Skip to content

GitLab

Commit 8df54762 authored by Lee-Ping Wang's avatar Lee-Ping Wang
Browse files

Merge branch 'master' of github.com:leeping/openmm

parents 3cb25ad8 59854c5e
Expand all Hide whitespace changes
Inline Side-by-side
Showing with 4201 additions and 13 deletions
platforms/cpu/include/CpuKernels.h 0 → 100644
View file @ 8df54762
#ifndef OPENMM_CPUKERNELS_H_
#define OPENMM_CPUKERNELS_H_
/* -------------------------------------------------------------------------- *
* OpenMM *
* -------------------------------------------------------------------------- *
* This is part of the OpenMM molecular simulation toolkit originating from *
* Simbios, the NIH National Center for Physics-Based Simulation of *
* Biological Structures at Stanford, funded under the NIH Roadmap for *
* Medical Research, grant U54 GM072970. See https://simtk.org. *
* *
* Portions copyright (c) 2013 Stanford University and the Authors. *
* Authors: Peter Eastman *
* Contributors: *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the "Software"), *
* to deal in the Software without restriction, including without limitation *
* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
* and/or sell copies of the Software, and to permit persons to whom the *
* Software is furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included in *
* all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS, CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE *
* USE OR OTHER DEALINGS IN THE SOFTWARE. *
* -------------------------------------------------------------------------- */
#include "CpuPlatform.h"
#include "CpuNeighborList.h"
#include "CpuNonbondedForce.h"
#include "openmm/kernels.h"
#include "openmm/System.h"
#include "openmm/internal/ThreadPool.h"
namespace OpenMM {
/**
* This kernel is invoked by NonbondedForce to calculate the forces acting on the system.
*/
class CpuCalcNonbondedForceKernel : public CalcNonbondedForceKernel {
public:
CpuCalcNonbondedForceKernel(std::string name, const Platform& platform) : CalcNonbondedForceKernel(name, platform),
bonded14IndexArray(NULL), bonded14ParamArray(NULL), hasInitializedPme(false) {
}
~CpuCalcNonbondedForceKernel();
/**
* Initialize the kernel.
*
* @param system the System this kernel will be applied to
* @param force the NonbondedForce this kernel will be used for
*/
void initialize(const System& system, const NonbondedForce& force);
/**
* Execute the kernel to calculate the forces and/or energy.
*
* @param context the context in which to execute this kernel
* @param includeForces true if forces should be calculated
* @param includeEnergy true if the energy should be calculated
* @param includeDirect true if direct space interactions should be included
* @param includeReciprocal true if reciprocal space interactions should be included
* @return the potential energy due to the force
*/
double execute(ContextImpl& context, bool includeForces, bool includeEnergy, bool includeDirect, bool includeReciprocal);
/**
* Copy changed parameters over to a context.
*
* @param context the context to copy parameters to
* @param force the NonbondedForce to copy the parameters from
*/
void copyParametersToContext(ContextImpl& context, const NonbondedForce& force);
private:
class PmeIO;
int numParticles, num14;
int **bonded14IndexArray;
double **bonded14ParamArray;
double nonbondedCutoff, switchingDistance, rfDielectric, ewaldAlpha, ewaldSelfEnergy, dispersionCoefficient;
int kmax[3], gridSize[3];
bool useSwitchingFunction, useOptimizedPme, hasInitializedPme;
std::vector<std::set<int> > exclusions;
std::vector<std::pair<float, float> > particleParams;
std::vector<float> posq;
std::vector<float> forces;
std::vector<RealVec> lastPositions;
NonbondedMethod nonbondedMethod;
CpuNeighborList neighborList;
CpuNonbondedForce nonbonded;
ThreadPool threads;
Kernel optimizedPme;
};
} // namespace OpenMM
#endif /*OPENMM_CPUKERNELS_H_*/
platforms/cpu/include/CpuNeighborList.h 0 → 100644
View file @ 8df54762
#ifndef OPENMM_CPU_NEIGHBORLIST_H_
#define OPENMM_CPU_NEIGHBORLIST_H_
/* -------------------------------------------------------------------------- *
* OpenMM *
* -------------------------------------------------------------------------- *
* This is part of the OpenMM molecular simulation toolkit originating from *
* Simbios, the NIH National Center for Physics-Based Simulation of *
* Biological Structures at Stanford, funded under the NIH Roadmap for *
* Medical Research, grant U54 GM072970. See https://simtk.org. *
* *
* Portions copyright (c) 2013 Stanford University and the Authors. *
* Authors: Peter Eastman *
* Contributors: *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the "Software"), *
* to deal in the Software without restriction, including without limitation *
* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
* and/or sell copies of the Software, and to permit persons to whom the *
* Software is furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included in *
* all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS, CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE *
* USE OR OTHER DEALINGS IN THE SOFTWARE. *
* -------------------------------------------------------------------------- */
#include "windowsExportCpu.h"
#include "openmm/internal/ThreadPool.h"
#include <set>
#include <utility>
#include <vector>
namespace OpenMM {
class OPENMM_EXPORT_CPU CpuNeighborList {
public:
class ThreadTask;
class Voxels;
static const int BlockSize;
CpuNeighborList();
void computeNeighborList(int numAtoms, const std::vector<float>& atomLocations, const std::vector<std::set<int> >& exclusions,
const float* periodicBoxSize, bool usePeriodic, float maxDistance, ThreadPool& threads);
int getNumBlocks() const;
const std::vector<int>& getSortedAtoms() const;
const std::vector<int>& getBlockNeighbors(int blockIndex) const;
const std::vector<char>& getBlockExclusions(int blockIndex) const;
/**
* This routine contains the code executed by each thread.
*/
void threadComputeNeighborList(ThreadPool& threads, int threadIndex);
void runThread(int index);
private:
std::vector<int> sortedAtoms;
std::vector<std::vector<int> > blockNeighbors;
std::vector<std::vector<char> > blockExclusions;
// The following variables are used to make information accessible to the individual threads.
float minx, maxx, miny, maxy, minz, maxz;
std::vector<std::pair<int, int> > atomBins;
Voxels* voxels;
const std::vector<std::set<int> >* exclusions;
const float* atomLocations;
const float* periodicBoxSize;
int numAtoms;
bool usePeriodic;
float maxDistance;
};
} // namespace OpenMM
#endif // OPENMM_CPU_NEIGHBORLIST_H_
platforms/reference/include/ReferenceShakeAlgorithm.h → platforms/cpu/include/CpuNonbondedForce.h
View file @ 8df54762
/* Portions copyright (c) 2006-2009 Stanford University and Simbios.
/* Portions copyright (c) 2006-2013 Stanford University and Simbios.
* Contributors: Pande Group
*
* Permission is hereby granted, free of charge, to any person obtaining
......@@ -22,152 +22,229 @@
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef __ReferenceShakeAlgorithm_H__
#define __ReferenceShakeAlgorithm_H__
#include "ReferenceConstraintAlgorithm.h"
#ifndef OPENMM_CPU_NONBONDED_FORCE_H__
#define OPENMM_CPU_NONBONDED_FORCE_H__
#include "CpuNeighborList.h"
#include "ReferencePairIxn.h"
#include "openmm/internal/ThreadPool.h"
#include "openmm/internal/vectorize.h"
#include <set>
#include <utility>
#include <vector>
// ---------------------------------------------------------------------------------------
class ReferenceShakeAlgorithm : public ReferenceConstraintAlgorithm {
protected:
int _maximumNumberOfIterations;
RealOpenMM _tolerance;
namespace OpenMM {
int _numberOfConstraints;
int** _atomIndices;
RealOpenMM* _distance;
RealOpenMM** _r_ij;
RealOpenMM* _d_ij2;
RealOpenMM* _distanceTolerance;
RealOpenMM* _reducedMasses;
bool _hasInitializedMasses;
public:
/**---------------------------------------------------------------------------------------
ReferenceShakeAlgorithm constructor
@param numberOfConstraints number of constraints
@param atomIndices atom indices for contraints
@param distance distances for constraints
@param tolerance constraint tolerance
--------------------------------------------------------------------------------------- */
ReferenceShakeAlgorithm( int numberOfConstraints, int** atomIndices, RealOpenMM* distance, RealOpenMM tolerance );
class CpuNonbondedForce {
public:
class ComputeDirectTask;
/**---------------------------------------------------------------------------------------
Destructor
Constructor
--------------------------------------------------------------------------------------- */
~ReferenceShakeAlgorithm( );
CpuNonbondedForce();
/**---------------------------------------------------------------------------------------
Get number of constraints
Set the force to use a cutoff.
@return number of constraints
@param distance the cutoff distance
@param neighbors the neighbor list to use
@param solventDielectric the dielectric constant of the bulk solvent
--------------------------------------------------------------------------------------- */
int getNumberOfConstraints( void ) const;
void setUseCutoff(float distance, const CpuNeighborList& neighbors, float solventDielectric);
/**---------------------------------------------------------------------------------------
Get maximum number of iterations
Set the force to use a switching function on the Lennard-Jones interaction.
@return maximum number of iterations
@param distance the switching distance
--------------------------------------------------------------------------------------- */
int getMaximumNumberOfIterations( void ) const;
void setUseSwitchingFunction(float distance);
/**---------------------------------------------------------------------------------------
Set maximum number of iterations
Set the force to use periodic boundary conditions. This requires that a cutoff has
already been set, and the smallest side of the periodic box is at least twice the cutoff
distance.
@param maximumNumberOfIterations new maximum number of iterations
@param boxSize the X, Y, and Z widths of the periodic box
--------------------------------------------------------------------------------------- */
void setMaximumNumberOfIterations( int maximumNumberOfIterations );
void setPeriodic(float* periodicBoxSize);
/**---------------------------------------------------------------------------------------
Get tolerance
Set the force to use Ewald summation.
@return tolerance
@param alpha the Ewald separation parameter
@param kmaxx the largest wave vector in the x direction
@param kmaxy the largest wave vector in the y direction
@param kmaxz the largest wave vector in the z direction
--------------------------------------------------------------------------------------- */
RealOpenMM getTolerance( void ) const;
void setUseEwald(float alpha, int kmaxx, int kmaxy, int kmaxz);
/**---------------------------------------------------------------------------------------
Set tolerance
Set the force to use Particle-Mesh Ewald (PME) summation.
@param tolerance new tolerance
@param alpha the Ewald separation parameter
@param gridSize the dimensions of the mesh
--------------------------------------------------------------------------------------- */
void setTolerance( RealOpenMM tolerance );
void setUsePME(float alpha, int meshSize[3]);
/**---------------------------------------------------------------------------------------
Apply Shake algorithm
Calculate Ewald ixn
@param numberOfAtoms number of atoms
@param atomCoordinates atom coordinates
@param atomCoordinatesP atom coordinates prime
@param inverseMasses 1/mass
@return SimTKOpenMMCommon::DefaultReturn if converge; else
return SimTKOpenMMCommon::ErrorReturn
@param posq atom coordinates and charges
@param atomCoordinates atom coordinates (in format needed by PME)
@param atomParameters atom parameters (sigma/2, 2*sqrt(epsilon))
@param exclusions atom exclusion indices
exclusions[atomIndex] contains the list of exclusions for that atom
@param forces force array (forces added)
@param totalEnergy total energy
--------------------------------------------------------------------------------------- */
void calculateReciprocalIxn(int numberOfAtoms, float* posq, const std::vector<RealVec>& atomCoordinates,
const std::vector<std::pair<float, float> >& atomParameters, const std::vector<std::set<int> >& exclusions,
std::vector<RealVec>& forces, float* totalEnergy) const;
int apply( int numberOfAtoms, std::vector<OpenMM::RealVec>& atomCoordinates,
std::vector<OpenMM::RealVec>& atomCoordinatesP, std::vector<RealOpenMM>& inverseMasses );
/**---------------------------------------------------------------------------------------
Apply constraint algorithm to velocities.
Calculate LJ Coulomb pair ixn
@param numberOfAtoms number of atoms
@param atomCoordinates atom coordinates
@param velocities atom velocities
@param inverseMasses 1/mass
@return SimTKOpenMMCommon::DefaultReturn if converge; else
return SimTKOpenMMCommon::ErrorReturn
--------------------------------------------------------------------------------------- */
int applyToVelocities(int numberOfAtoms, std::vector<OpenMM::RealVec>& atomCoordinates,
std::vector<OpenMM::RealVec>& velocities, std::vector<RealOpenMM>& inverseMasses);
@param posq atom coordinates and charges
@param atomCoordinates atom coordinates (periodic boundary conditions not applied)
@param atomParameters atom parameters (sigma/2, 2*sqrt(epsilon))
@param exclusions atom exclusion indices
exclusions[atomIndex] contains the list of exclusions for that atom
@param forces force array (forces added)
@param totalEnergy total energy
@param threads the thread pool to use
--------------------------------------------------------------------------------------- */
void calculateDirectIxn(int numberOfAtoms, float* posq, const std::vector<RealVec>& atomCoordinates, const std::vector<std::pair<float, float> >& atomParameters,
const std::vector<std::set<int> >& exclusions, float* forces, float* totalEnergy, ThreadPool& threads);
/**
* This routine contains the code executed by each thread.
*/
void threadComputeDirect(ThreadPool& threads, int threadIndex);
private:
bool cutoff;
bool useSwitch;
bool periodic;
bool ewald;
bool pme;
const CpuNeighborList* neighborList;
float periodicBoxSize[3];
float cutoffDistance, switchingDistance;
float krf, crf;
float alphaEwald;
int numRx, numRy, numRz;
int meshDim[3];
std::vector<float> ewaldScaleTable;
float ewaldDX, ewaldDXInv;
std::vector<std::vector<float> > threadForce;
std::vector<double> threadEnergy;
// The following variables are used to make information accessible to the individual threads.
int numberOfAtoms;
float* posq;
RealVec const* atomCoordinates;
std::pair<float, float> const* atomParameters;
std::set<int> const* exclusions;
bool includeEnergy;
static const float TWO_OVER_SQRT_PI;
static const int NUM_TABLE_POINTS;
/**---------------------------------------------------------------------------------------
Report any violated constraints
Calculate LJ Coulomb pair ixn between two atoms
@param numberOfAtoms number of atoms
@param atomCoordinates atom coordinates
@param message report
@param atom1 the index of the first atom
@param atom2 the index of the second atom
@param forces force array (forces added)
@param totalEnergy total energy
--------------------------------------------------------------------------------------- */
void calculateOneIxn(int atom1, int atom2, float* forces, double* totalEnergy, const fvec4& boxSize, const fvec4& invBoxSize);
/**---------------------------------------------------------------------------------------
@return number of violated constraints
Calculate all the interactions for one atom block.
@param blockIndex the index of the atom block
@param forces force array (forces added)
@param totalEnergy total energy
--------------------------------------------------------------------------------------- */
void calculateBlockIxn(int blockIndex, float* forces, double* totalEnergy, const fvec4& boxSize, const fvec4& invBoxSize);
/**---------------------------------------------------------------------------------------
Calculate all the interactions for one atom block.
int reportShake( int numberOfAtoms, std::vector<OpenMM::RealVec>& atomCoordinates, std::stringstream& message );
@param blockIndex the index of the atom block
@param forces force array (forces added)
@param totalEnergy total energy
--------------------------------------------------------------------------------------- */
void calculateBlockEwaldIxn(int blockIndex, float* forces, double* totalEnergy, const fvec4& boxSize, const fvec4& invBoxSize);
/**
* Compute the displacement and squared distance between two points, optionally using
* periodic boundary conditions.
*/
void getDeltaR(const fvec4& posI, const fvec4& posJ, fvec4& deltaR, float& r2, bool periodic, const fvec4& boxSize, const fvec4& invBoxSize) const;
/**
* Compute the displacement and squared distance between a collection of points, optionally using
* periodic boundary conditions.
*/
void getDeltaR(const fvec4& posI, const fvec4& x, const fvec4& y, const fvec4& z, fvec4& dx, fvec4& dy, fvec4& dz, fvec4& r2, bool periodic, const fvec4& boxSize, const fvec4& invBoxSize) const;
/**
* Compute a fast approximation to erfc(x).
*/
static fvec4 erfcApprox(fvec4 x);
/**
* Create a lookup table for the scale factor used with Ewald and PME.
*/
void tabulateEwaldScaleFactor();
/**
* Evaluate the scale factor used with Ewald and PME: erfc(alpha*r) + 2*alpha*r*exp(-alpha*alpha*r*r)/sqrt(PI)
*/
fvec4 ewaldScaleFunction(fvec4 x);
};
} // namespace OpenMM
// ---------------------------------------------------------------------------------------
#endif // __ReferenceShakeAlgorithm_H__
#endif // OPENMM_CPU_NONBONDED_FORCE_H__
platforms/cpu/include/CpuPlatform.h 0 → 100644
View file @ 8df54762
#ifndef OPENMM_CPUPLATFORM_H_
#define OPENMM_CPUPLATFORM_H_
/* -------------------------------------------------------------------------- *
* OpenMM *
* -------------------------------------------------------------------------- *
* This is part of the OpenMM molecular simulation toolkit originating from *
* Simbios, the NIH National Center for Physics-Based Simulation of *
* Biological Structures at Stanford, funded under the NIH Roadmap for *
* Medical Research, grant U54 GM072970. See https://simtk.org. *
* *
* Portions copyright (c) 2013 Stanford University and the Authors. *
* Authors: Peter Eastman *
* Contributors: *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the "Software"), *
* to deal in the Software without restriction, including without limitation *
* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
* and/or sell copies of the Software, and to permit persons to whom the *
* Software is furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included in *
* all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS, CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE *
* USE OR OTHER DEALINGS IN THE SOFTWARE. *
* -------------------------------------------------------------------------- */
#include "ReferencePlatform.h"
#include "windowsExportCpu.h"
namespace OpenMM {
/**
* This Platform subclass uses CPU implementations of the OpenMM kernels.
*/
class OPENMM_EXPORT_CPU CpuPlatform : public ReferencePlatform {
public:
CpuPlatform();
const std::string& getName() const {
static const std::string name = "CPU";
return name;
}
double getSpeed() const;
bool supportsDoublePrecision() const;
static bool isProcessorSupported();
};
} // namespace OpenMM
#endif /*OPENMM_CPUPLATFORM_H_*/
platforms/cpu/include/windowsExportCpu.h 0 → 100644
View file @ 8df54762
#ifndef OPENMM_WINDOWSEXPORTCPU_H_
#define OPENMM_WINDOWSEXPORTCPU_H_
/*
* Shared libraries are messy in Visual Studio. We have to distinguish three
* cases:
* (1) this header is being used to build the OpenMM shared library
* (dllexport)
* (2) this header is being used by a *client* of the OpenMM shared
* library (dllimport)
* (3) we are building the OpenMM static library, or the client is
* being compiled with the expectation of linking with the
* OpenMM static library (nothing special needed)
* In the CMake script for building this library, we define one of the symbols
* OPENMM_CPU_BUILDING_{SHARED|STATIC}_LIBRARY
* Client code normally has no special symbol defined, in which case we'll
* assume it wants to use the shared library. However, if the client defines
* the symbol OPENMM_USE_STATIC_LIBRARIES we'll suppress the dllimport so
* that the client code can be linked with static libraries. Note that
* the client symbol is not library dependent, while the library symbols
* affect only the OpenMM library, meaning that other libraries can
* be clients of this one. However, we are assuming all-static or all-shared.
*/
#ifdef _MSC_VER
// We don't want to hear about how sprintf is "unsafe".
#pragma warning(disable:4996)
// Keep MS VC++ quiet about lack of dll export of private members.
#pragma warning(disable:4251)
#if defined(OPENMM_CPU_BUILDING_SHARED_LIBRARY)
#define OPENMM_EXPORT_CPU __declspec(dllexport)
#elif defined(OPENMM_CPU_BUILDING_STATIC_LIBRARY) || defined(OPENMM_CPU_USE_STATIC_LIBRARIES)
#define OPENMM_EXPORT_CPU
#else
#define OPENMM_EXPORT_CPU __declspec(dllimport) // i.e., a client of a shared library
#endif
#else
#define OPENMM_EXPORT_CPU // Linux, Mac
#endif
#endif // OPENMM_WINDOWSEXPORTCPU_H_
platforms/cpu/sharedTarget/CMakeLists.txt 0 → 100644
View file @ 8df54762
SET_SOURCE_FILES_PROPERTIES(${SOURCE_FILES} PROPERTIES COMPILE_FLAGS "-msse4.1")
ADD_LIBRARY(${SHARED_TARGET} SHARED ${SOURCE_FILES} ${SOURCE_INCLUDE_FILES} ${API_ABS_INCLUDE_FILES})
IF (UNIX AND CMAKE_BUILD_TYPE MATCHES Debug)
SET(MAIN_OPENMM_LIB ${OPENMM_LIBRARY_NAME}_d)
ELSE (UNIX AND CMAKE_BUILD_TYPE MATCHES Debug)
SET(MAIN_OPENMM_LIB ${OPENMM_LIBRARY_NAME})
ENDIF (UNIX AND CMAKE_BUILD_TYPE MATCHES Debug)
TARGET_LINK_LIBRARIES(${SHARED_TARGET} ${MAIN_OPENMM_LIB} ${PTHREADS_LIB})
SET_TARGET_PROPERTIES(${SHARED_TARGET} PROPERTIES COMPILE_FLAGS "-DOPENMM_CPU_BUILDING_SHARED_LIBRARY")
INSTALL_TARGETS(/lib/plugins RUNTIME_DIRECTORY /lib/plugins ${SHARED_TARGET})
platforms/cpu/src/CpuKernelFactory.cpp 0 → 100644
View file @ 8df54762
/* -------------------------------------------------------------------------- *
* OpenMM *
* -------------------------------------------------------------------------- *
* This is part of the OpenMM molecular simulation toolkit originating from *
* Simbios, the NIH National Center for Physics-Based Simulation of *
* Biological Structures at Stanford, funded under the NIH Roadmap for *
* Medical Research, grant U54 GM072970. See https://simtk.org. *
* *
* Portions copyright (c) 2013 Stanford University and the Authors. *
* Authors: Peter Eastman *
* Contributors: *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the "Software"), *
* to deal in the Software without restriction, including without limitation *
* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
* and/or sell copies of the Software, and to permit persons to whom the *
* Software is furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included in *
* all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS, CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE *
* USE OR OTHER DEALINGS IN THE SOFTWARE. *
* -------------------------------------------------------------------------- */
#include "CpuKernelFactory.h"
#include "CpuKernels.h"
#include "CpuPlatform.h"
#include "openmm/internal/ContextImpl.h"
#include "openmm/OpenMMException.h"
using namespace OpenMM;
KernelImpl* CpuKernelFactory::createKernelImpl(std::string name, const Platform& platform, ContextImpl& context) const {
ReferencePlatform::PlatformData& data = *static_cast<ReferencePlatform::PlatformData*>(context.getPlatformData());
if (name == CalcNonbondedForceKernel::Name())
return new CpuCalcNonbondedForceKernel(name, platform);
throw OpenMMException((std::string("Tried to create kernel with illegal kernel name '") + name + "'").c_str());
}
platforms/cpu/src/CpuKernels.cpp 0 → 100644
View file @ 8df54762
/* -------------------------------------------------------------------------- *
* OpenMM *
* -------------------------------------------------------------------------- *
* This is part of the OpenMM molecular simulation toolkit originating from *
* Simbios, the NIH National Center for Physics-Based Simulation of *
* Biological Structures at Stanford, funded under the NIH Roadmap for *
* Medical Research, grant U54 GM072970. See https://simtk.org. *
* *
* Portions copyright (c) 2013 Stanford University and the Authors. *
* Authors: Peter Eastman *
* Contributors: *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the "Software"), *
* to deal in the Software without restriction, including without limitation *
* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
* and/or sell copies of the Software, and to permit persons to whom the *
* Software is furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included in *
* all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS, CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE *
* USE OR OTHER DEALINGS IN THE SOFTWARE. *
* -------------------------------------------------------------------------- */
#include "CpuKernels.h"
#include "ReferenceBondForce.h"
#include "ReferenceLJCoulomb14.h"
#include "openmm/Context.h"
#include "openmm/OpenMMException.h"
#include "openmm/internal/ContextImpl.h"
#include "openmm/internal/NonbondedForceImpl.h"
#include "RealVec.h"
using namespace OpenMM;
using namespace std;
static vector<RealVec>& extractPositions(ContextImpl& context) {
ReferencePlatform::PlatformData* data = reinterpret_cast<ReferencePlatform::PlatformData*>(context.getPlatformData());
return *((vector<RealVec>*) data->positions);
}
static vector<RealVec>& extractVelocities(ContextImpl& context) {
ReferencePlatform::PlatformData* data = reinterpret_cast<ReferencePlatform::PlatformData*>(context.getPlatformData());
return *((vector<RealVec>*) data->velocities);
}
static vector<RealVec>& extractForces(ContextImpl& context) {
ReferencePlatform::PlatformData* data = reinterpret_cast<ReferencePlatform::PlatformData*>(context.getPlatformData());
return *((vector<RealVec>*) data->forces);
}
static RealVec& extractBoxSize(ContextImpl& context) {
ReferencePlatform::PlatformData* data = reinterpret_cast<ReferencePlatform::PlatformData*>(context.getPlatformData());
return *(RealVec*) data->periodicBoxSize;
}
class CpuCalcNonbondedForceKernel::PmeIO : public CalcPmeReciprocalForceKernel::IO {
public:
PmeIO(float* posq, float* force, int numParticles) : posq(posq), force(force), numParticles(numParticles) {
}
float* getPosq() {
return posq;
}
void setForce(float* f) {
for (int i = 0; i < numParticles; i++) {
force[4*i] += f[4*i];
force[4*i+1] += f[4*i+1];
force[4*i+2] += f[4*i+2];
}
}
private:
float* posq;
float* force;
int numParticles;
};
CpuCalcNonbondedForceKernel::~CpuCalcNonbondedForceKernel() {
if (bonded14ParamArray != NULL) {
for (int i = 0; i < num14; i++) {
delete[] bonded14IndexArray[i];
delete[] bonded14ParamArray[i];
}
delete bonded14IndexArray;
delete bonded14ParamArray;
}
}
void CpuCalcNonbondedForceKernel::initialize(const System& system, const NonbondedForce& force) {
// Identify which exceptions are 1-4 interactions.
numParticles = force.getNumParticles();
posq.resize(4*numParticles, 0);
forces.resize(4*numParticles, 0);
exclusions.resize(numParticles);
vector<int> nb14s;
for (int i = 0; i < force.getNumExceptions(); i++) {
int particle1, particle2;
double chargeProd, sigma, epsilon;
force.getExceptionParameters(i, particle1, particle2, chargeProd, sigma, epsilon);
exclusions[particle1].insert(particle2);
exclusions[particle2].insert(particle1);
if (chargeProd != 0.0 || epsilon != 0.0)
nb14s.push_back(i);
}
// Record the particle parameters.
num14 = nb14s.size();
bonded14IndexArray = new int*[num14];
for (int i = 0; i < num14; i++)
bonded14IndexArray[i] = new int[2];
bonded14ParamArray = new double*[num14];
for (int i = 0; i < num14; i++)
bonded14ParamArray[i] = new double[3];
particleParams.resize(numParticles);
double sumSquaredCharges = 0.0;
for (int i = 0; i < numParticles; ++i) {
double charge, radius, depth;
force.getParticleParameters(i, charge, radius, depth);
posq[4*i+3] = (float) charge;
particleParams[i] = make_pair((float) (0.5*radius), (float) (2.0*sqrt(depth)));
sumSquaredCharges += charge*charge;
}
// Recorded exception parameters.
for (int i = 0; i < num14; ++i) {
int particle1, particle2;
double charge, radius, depth;
force.getExceptionParameters(nb14s[i], particle1, particle2, charge, radius, depth);
bonded14IndexArray[i][0] = particle1;
bonded14IndexArray[i][1] = particle2;
bonded14ParamArray[i][0] = static_cast<RealOpenMM>(radius);
bonded14ParamArray[i][1] = static_cast<RealOpenMM>(4.0*depth);
bonded14ParamArray[i][2] = static_cast<RealOpenMM>(charge);
}
// Record other parameters.
nonbondedMethod = CalcNonbondedForceKernel::NonbondedMethod(force.getNonbondedMethod());
nonbondedCutoff = force.getCutoffDistance();
if (nonbondedMethod == NoCutoff)
useSwitchingFunction = false;
else {
useSwitchingFunction = force.getUseSwitchingFunction();
switchingDistance = force.getSwitchingDistance();
}
if (nonbondedMethod == Ewald) {
double alpha;
NonbondedForceImpl::calcEwaldParameters(system, force, alpha, kmax[0], kmax[1], kmax[2]);
ewaldAlpha = alpha;
}
else if (nonbondedMethod == PME) {
double alpha;
NonbondedForceImpl::calcPMEParameters(system, force, alpha, gridSize[0], gridSize[1], gridSize[2]);
ewaldAlpha = alpha;
}
if (nonbondedMethod == Ewald || nonbondedMethod == PME)
ewaldSelfEnergy = -ONE_4PI_EPS0*ewaldAlpha*sumSquaredCharges/sqrt(M_PI);
else
ewaldSelfEnergy = 0.0;
rfDielectric = force.getReactionFieldDielectric();
if (force.getUseDispersionCorrection())
dispersionCoefficient = NonbondedForceImpl::calcDispersionCorrection(system, force);
else
dispersionCoefficient = 0.0;
lastPositions.resize(numParticles, Vec3(1e10, 1e10, 1e10));
}
double CpuCalcNonbondedForceKernel::execute(ContextImpl& context, bool includeForces, bool includeEnergy, bool includeDirect, bool includeReciprocal) {
if (!hasInitializedPme) {
hasInitializedPme = true;
useOptimizedPme = false;
if (nonbondedMethod == PME) {
// If available, use the optimized PME implementation.
try {
optimizedPme = getPlatform().createKernel(CalcPmeReciprocalForceKernel::Name(), context);
optimizedPme.getAs<CalcPmeReciprocalForceKernel>().initialize(gridSize[0], gridSize[1], gridSize[2], numParticles, ewaldAlpha);
useOptimizedPme = true;
}
catch (OpenMMException& ex) {
// The CPU PME plugin isn't available.
}
}
}
vector<RealVec>& posData = extractPositions(context);
vector<RealVec>& forceData = extractForces(context);
RealVec boxSize = extractBoxSize(context);
float floatBoxSize[3] = {(float) boxSize[0], (float) boxSize[1], (float) boxSize[2]};
double energy = ewaldSelfEnergy;
bool periodic = (nonbondedMethod == CutoffPeriodic);
bool ewald = (nonbondedMethod == Ewald);
bool pme = (nonbondedMethod == PME);
// Convert the positions to single precision.
if (periodic || ewald || pme)
for (int i = 0; i < numParticles; i++)
for (int j = 0; j < 3; j++) {
RealOpenMM x = posData[i][j];
double base = floor(x/boxSize[j])*boxSize[j];
posq[4*i+j] = (float) (x-base);
}
else
for (int i = 0; i < numParticles; i++) {
posq[4*i] = (float) posData[i][0];
posq[4*i+1] = (float) posData[i][1];
posq[4*i+2] = (float) posData[i][2];
}
for (int i = 0; i < 4*numParticles; i++)
forces[i] = 0.0f;
if (nonbondedMethod != NoCutoff) {
// Determine whether we need to recompute the neighbor list.
double padding = 0.15*nonbondedCutoff;
bool needRecompute = false;
double closeCutoff2 = 0.25*padding*padding;
double farCutoff2 = 0.5*padding*padding;
int maxNumMoved = numParticles/10;
vector<int> moved;
for (int i = 0; i < numParticles; i++) {
RealVec delta = posData[i]-lastPositions[i];
double dist2 = delta.dot(delta);
if (dist2 > closeCutoff2) {
moved.push_back(i);
if (dist2 > farCutoff2 || moved.size() > maxNumMoved) {
needRecompute = true;
break;
}
}
}
if (!needRecompute && moved.size() > 0) {
// Some particles have moved further than half the padding distance. Look for pairs
// that are missing from the neighbor list.
int numMoved = moved.size();
double cutoff2 = nonbondedCutoff*nonbondedCutoff;
double paddedCutoff2 = (nonbondedCutoff+padding)*(nonbondedCutoff+padding);
for (int i = 1; i < numMoved && !needRecompute; i++)
for (int j = 0; j < i; j++) {
RealVec delta = posData[moved[i]]-posData[moved[j]];
if (delta.dot(delta) < cutoff2) {
// These particles should interact. See if they are in the neighbor list.
RealVec oldDelta = lastPositions[moved[i]]-lastPositions[moved[j]];
if (oldDelta.dot(oldDelta) > paddedCutoff2) {
needRecompute = true;
break;
}
}
}
}
if (needRecompute) {
neighborList.computeNeighborList(numParticles, posq, exclusions, floatBoxSize, periodic || ewald || pme, nonbondedCutoff+padding, threads);
lastPositions = posData;
}
nonbonded.setUseCutoff(nonbondedCutoff, neighborList, rfDielectric);
}
if (periodic || ewald || pme) {
double minAllowedSize = 1.999999*nonbondedCutoff;
if (boxSize[0] < minAllowedSize || boxSize[1] < minAllowedSize || boxSize[2] < minAllowedSize)
throw OpenMMException("The periodic box size has decreased to less than twice the nonbonded cutoff.");
nonbonded.setPeriodic(floatBoxSize);
}
if (ewald)
nonbonded.setUseEwald(ewaldAlpha, kmax[0], kmax[1], kmax[2]);
if (pme)
nonbonded.setUsePME(ewaldAlpha, gridSize);
if (useSwitchingFunction)
nonbonded.setUseSwitchingFunction(switchingDistance);
float nonbondedEnergy = 0;
if (includeDirect)
nonbonded.calculateDirectIxn(numParticles, &posq[0], posData, particleParams, exclusions, &forces[0], includeEnergy ? &nonbondedEnergy : NULL, threads);
if (includeReciprocal) {
if (useOptimizedPme) {
PmeIO io(&posq[0], &forces[0], numParticles);
Vec3 periodicBoxSize(boxSize[0], boxSize[1], boxSize[2]);
optimizedPme.getAs<CalcPmeReciprocalForceKernel>().beginComputation(io, periodicBoxSize, includeEnergy);
optimizedPme.getAs<CalcPmeReciprocalForceKernel>().finishComputation(io);
}
else
nonbonded.calculateReciprocalIxn(numParticles, &posq[0], posData, particleParams, exclusions, forceData, includeEnergy ? &nonbondedEnergy : NULL);
}
energy += nonbondedEnergy;
for (int i = 0; i < numParticles; i++) {
forceData[i][0] += forces[4*i];
forceData[i][1] += forces[4*i+1];
forceData[i][2] += forces[4*i+2];
}
if (includeDirect) {
ReferenceBondForce refBondForce;
ReferenceLJCoulomb14 nonbonded14;
refBondForce.calculateForce(num14, bonded14IndexArray, posData, bonded14ParamArray, forceData, includeEnergy ? &energy : NULL, nonbonded14);
if (periodic || ewald || pme)
energy += dispersionCoefficient/(boxSize[0]*boxSize[1]*boxSize[2]);
}
return energy;
}
void CpuCalcNonbondedForceKernel::copyParametersToContext(ContextImpl& context, const NonbondedForce& force) {
if (force.getNumParticles() != numParticles)
throw OpenMMException("updateParametersInContext: The number of particles has changed");
vector<int> nb14s;
for (int i = 0; i < force.getNumExceptions(); i++) {
int particle1, particle2;
double chargeProd, sigma, epsilon;
force.getExceptionParameters(i, particle1, particle2, chargeProd, sigma, epsilon);
if (chargeProd != 0.0 || epsilon != 0.0)
nb14s.push_back(i);
}
if (nb14s.size() != num14)
throw OpenMMException("updateParametersInContext: The number of non-excluded exceptions has changed");
// Record the values.
double sumSquaredCharges = 0.0;
for (int i = 0; i < numParticles; ++i) {
double charge, radius, depth;
force.getParticleParameters(i, charge, radius, depth);
posq[4*i+3] = (float) charge;
particleParams[i] = make_pair((float) (0.5*radius), (float) (2.0*sqrt(depth)));
sumSquaredCharges += charge*charge;
}
if (nonbondedMethod == Ewald || nonbondedMethod == PME)
ewaldSelfEnergy = -ONE_4PI_EPS0*ewaldAlpha*sumSquaredCharges/sqrt(M_PI);
else
ewaldSelfEnergy = 0.0;
for (int i = 0; i < num14; ++i) {
int particle1, particle2;
double charge, radius, depth;
force.getExceptionParameters(nb14s[i], particle1, particle2, charge, radius, depth);
bonded14IndexArray[i][0] = particle1;
bonded14IndexArray[i][1] = particle2;
bonded14ParamArray[i][0] = static_cast<RealOpenMM>(radius);
bonded14ParamArray[i][1] = static_cast<RealOpenMM>(4.0*depth);
bonded14ParamArray[i][2] = static_cast<RealOpenMM>(charge);
}
// Recompute the coefficient for the dispersion correction.
NonbondedForce::NonbondedMethod method = force.getNonbondedMethod();
if (force.getUseDispersionCorrection() && (method == NonbondedForce::CutoffPeriodic || method == NonbondedForce::Ewald || method == NonbondedForce::PME))
dispersionCoefficient = NonbondedForceImpl::calcDispersionCorrection(context.getSystem(), force);
}
platforms/cpu/src/CpuNeighborList.cpp 0 → 100644
View file @ 8df54762
/* -------------------------------------------------------------------------- *
* OpenMM *
* -------------------------------------------------------------------------- *
* This is part of the OpenMM molecular simulation toolkit originating from *
* Simbios, the NIH National Center for Physics-Based Simulation of *
* Biological Structures at Stanford, funded under the NIH Roadmap for *
* Medical Research, grant U54 GM072970. See https://simtk.org. *
* *
* Portions copyright (c) 2013 Stanford University and the Authors. *
* Authors: Peter Eastman *
* Contributors: *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the "Software"), *
* to deal in the Software without restriction, including without limitation *
* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
* and/or sell copies of the Software, and to permit persons to whom the *
* Software is furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included in *
* all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS, CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE *
* USE OR OTHER DEALINGS IN THE SOFTWARE. *
* -------------------------------------------------------------------------- */
#include "CpuNeighborList.h"
#include "openmm/internal/hardware.h"
#include "openmm/internal/vectorize.h"
#include "hilbert.h"
#include <algorithm>
#include <set>
#include <map>
#include <cmath>
#include <smmintrin.h>
using namespace std;
namespace OpenMM {
const int CpuNeighborList::BlockSize = 4;
class VoxelIndex
{
public:
VoxelIndex(int x, int y) : x(x), y(y) {
}
int x;
int y;
};
/**
* This data structure organizes the particles spatially. It divides them into bins along the x and y axes,
* then sorts each bin along the z axis so ranges can be identified quickly with a binary search.
*/
class CpuNeighborList::Voxels {
public:
Voxels(float vsx, float vsy, float minx, float maxx, float miny, float maxy, const float* periodicBoxSize, bool usePeriodic) :
voxelSizeX(vsx), voxelSizeY(vsy), minx(minx), maxx(maxx), miny(miny), maxy(maxy), periodicBoxSize(periodicBoxSize), usePeriodic(usePeriodic) {
if (usePeriodic) {
nx = (int) floorf(periodicBoxSize[0]/voxelSizeX+0.5f);
ny = (int) floorf(periodicBoxSize[1]/voxelSizeY+0.5f);
voxelSizeX = periodicBoxSize[0]/nx;
voxelSizeY = periodicBoxSize[1]/ny;
}
else {
nx = max(1, (int) floorf((maxx-minx)/voxelSizeX+0.5f));
ny = max(1, (int) floorf((maxy-miny)/voxelSizeY+0.5f));
if (maxx > minx)
voxelSizeX = (maxx-minx)/nx;
if (maxy > miny)
voxelSizeY = (maxy-miny)/ny;
}
bins.resize(nx);
for (int i = 0; i < nx; i++) {
bins[i].resize(ny);
for (int j = 0; j < ny; j++)
bins[i][j].resize(0);
}
}
/**
* Insert a particle into the voxel data structure.
*/
void insert(const int& atom, const float* location) {
VoxelIndex voxelIndex = getVoxelIndex(location);
bins[voxelIndex.x][voxelIndex.y].push_back(make_pair(location[2], atom));
}
/**
* Sort the particles in each voxel by z coordinate.
*/
void sortItems() {
for (int i = 0; i < nx; i++)
for (int j = 0; j < ny; j++)
sort(bins[i][j].begin(), bins[i][j].end());
}
/**
* Find the index of the first particle in voxel (x,y) whose z coordinate in >= the specified value.
*/
int findLowerBound(int x, int y, double z) const {
const vector<pair<float, int> >& bin = bins[x][y];
int lower = 0;
int upper = bin.size();
while (lower < upper) {
int middle = (lower+upper)/2;
if (bin[middle].first < z)
lower = middle+1;
else
upper = middle;
}
return lower;
}
/**
* Find the index of the first particle in voxel (x,y) whose z coordinate in greater than the specified value.
*/
int findUpperBound(int x, int y, double z) const {
const vector<pair<float, int> >& bin = bins[x][y];
int lower = 0;
int upper = bin.size();
while (lower < upper) {
int middle = (lower+upper)/2;
if (bin[middle].first > z)
upper = middle;
else
lower = middle+1;
}
return upper;
}
/**
* Get the voxel index containing a particular location.
*/
VoxelIndex getVoxelIndex(const float* location) const {
float xperiodic, yperiodic;
if (!usePeriodic) {
xperiodic = location[0]-minx;
yperiodic = location[1]-miny;
}
else {
xperiodic = location[0]-periodicBoxSize[0]*floorf(location[0]/periodicBoxSize[0]);
yperiodic = location[1]-periodicBoxSize[1]*floorf(location[1]/periodicBoxSize[1]);
}
int x = min(nx-1, int(floorf(xperiodic / voxelSizeX)));
int y = min(ny-1, int(floorf(yperiodic / voxelSizeY)));
return VoxelIndex(x, y);
}
void getNeighbors(vector<int>& neighbors, int blockIndex, fvec4 blockCenter, fvec4 blockWidth, const vector<int>& sortedAtoms, vector<char>& exclusions, float maxDistance, const vector<int> blockAtoms, const float* atomLocations) const {
neighbors.resize(0);
exclusions.resize(0);
fvec4 boxSize(periodicBoxSize[0], periodicBoxSize[1], periodicBoxSize[2], 0);
fvec4 invBoxSize(1/periodicBoxSize[0], 1/periodicBoxSize[1], 1/periodicBoxSize[2], 0);
float maxDistanceSquared = maxDistance * maxDistance;
float refineCutoff = maxDistance-max(max(blockWidth[0], blockWidth[1]), blockWidth[2]);
float refineCutoffSquared = refineCutoff*refineCutoff;
int dIndexX = min(nx/2, int((maxDistance+blockWidth[0])/voxelSizeX)+1); // How may voxels away do we have to look?
int dIndexY = min(ny/2, int((maxDistance+blockWidth[1])/voxelSizeY)+1);
float centerPos[4];
blockCenter.store(centerPos);
VoxelIndex centerVoxelIndex = getVoxelIndex(centerPos);
int startx = centerVoxelIndex.x-dIndexX;
int starty = centerVoxelIndex.y-dIndexY;
int endx = centerVoxelIndex.x+dIndexX;
int endy = centerVoxelIndex.y+dIndexY;
int numRanges;
if (usePeriodic) {
endx = min(endx, centerVoxelIndex.x-dIndexX+nx-1);
endy = min(endy, centerVoxelIndex.y-dIndexY+ny-1);
}
else {
startx = max(startx, 0);
starty = max(starty, 0);
endx = min(endx, nx-1);
endy = min(endy, ny-1);
}
int lastSortedIndex = BlockSize*(blockIndex+1);
VoxelIndex voxelIndex(0, 0);
for (int x = startx; x <= endx; ++x) {
voxelIndex.x = x;
if (usePeriodic)
voxelIndex.x = (x < 0 ? x+nx : (x >= nx ? x-nx : x));
float dx = max(0.0f, voxelSizeX*max(0, abs(centerVoxelIndex.x-x)-1)-blockWidth[0]);
for (int y = starty; y <= endy; ++y) {
voxelIndex.y = y;
if (usePeriodic)
voxelIndex.y = (y < 0 ? y+ny : (y >= ny ? y-ny : y));
float dy = max(0.0f, voxelSizeY*max(0, abs(centerVoxelIndex.y-y)-1)-blockWidth[1]);
// Identify the range of atoms within this bin we need to search. When using periodic boundary
// conditions, there may be two separate ranges.
float dz = maxDistance+blockWidth[2];
dz = sqrtf(max(0.0f, dz*dz-dx*dx-dy*dy));
bool needPeriodic = (voxelIndex.x != x || voxelIndex.y != y || centerPos[2]-dz < 0.0f || centerPos[2]+dz > periodicBoxSize[2]);
int rangeStart[2];
int rangeEnd[2];
rangeStart[0] = findLowerBound(voxelIndex.x, voxelIndex.y, centerPos[2]-dz);
if (needPeriodic) {
numRanges = 2;
rangeEnd[0] = findUpperBound(voxelIndex.x, voxelIndex.y, centerPos[2]+dz);
if (rangeStart[0] > 0) {
rangeStart[1] = 0;
rangeEnd[1] = min(findUpperBound(voxelIndex.x, voxelIndex.y, centerPos[2]+dz-periodicBoxSize[2]), rangeStart[0]);
}
else {
rangeStart[1] = max(findLowerBound(voxelIndex.x, voxelIndex.y, centerPos[2]-dz+periodicBoxSize[2]), rangeEnd[0]);
rangeEnd[1] = bins[voxelIndex.x][voxelIndex.y].size();
}
}
else {
numRanges = 1;
rangeEnd[0] = findUpperBound(voxelIndex.x, voxelIndex.y, centerPos[2]+dz);
}
// Loop over atoms and check to see if they are neighbors of this block.
for (int range = 0; range < numRanges; range++) {
for (int item = rangeStart[range]; item < rangeEnd[range]; item++) {
const int sortedIndex = bins[voxelIndex.x][voxelIndex.y][item].second;
// Avoid duplicate entries.
if (sortedIndex >= lastSortedIndex)
continue;
fvec4 atomPos(atomLocations+4*sortedAtoms[sortedIndex]);
fvec4 delta = atomPos-centerPos;
if (needPeriodic) {
fvec4 base = round(delta*invBoxSize)*boxSize;
delta = delta-base;
}
delta = max(0.0f, abs(delta)-blockWidth);
float dSquared = dot3(delta, delta);
if (dSquared > maxDistanceSquared)
continue;
if (dSquared > refineCutoffSquared) {
// The distance is large enough that there might not be any actual interactions.
// Check individual atom pairs to be sure.
bool any = false;
for (int k = 0; k < (int) blockAtoms.size(); k++) {
fvec4 pos1(&atomLocations[4*blockAtoms[k]]);
delta = atomPos-pos1;
if (needPeriodic) {
fvec4 base = round(delta*invBoxSize)*boxSize;
delta = delta-base;
}
float r2 = dot3(delta, delta);
if (r2 < maxDistanceSquared) {
any = true;
break;
}
}
if (!any)
continue;
}
// Add this atom to the list of neighbors.
neighbors.push_back(sortedAtoms[sortedIndex]);
if (sortedIndex < BlockSize*blockIndex)
exclusions.push_back(0);
else
exclusions.push_back(0xF & (0xF<<(sortedIndex-BlockSize*blockIndex)));
}
}
}
}
}
private:
float voxelSizeX, voxelSizeY;
float minx, maxx, miny, maxy;
int nx, ny;
const float* periodicBoxSize;
const bool usePeriodic;
vector<vector<vector<pair<float, int> > > > bins;
};
class CpuNeighborList::ThreadTask : public ThreadPool::Task {
public:
ThreadTask(CpuNeighborList& owner) : owner(owner) {
}
void execute(ThreadPool& threads, int threadIndex) {
owner.threadComputeNeighborList(threads, threadIndex);
}
CpuNeighborList& owner;
};
CpuNeighborList::CpuNeighborList() {
}
void CpuNeighborList::computeNeighborList(int numAtoms, const vector<float>& atomLocations, const vector<set<int> >& exclusions,
const float* periodicBoxSize, bool usePeriodic, float maxDistance, ThreadPool& threads) {
int numBlocks = (numAtoms+BlockSize-1)/BlockSize;
blockNeighbors.resize(numBlocks);
blockExclusions.resize(numBlocks);
sortedAtoms.resize(numAtoms);
// Record the parameters for the threads.
this->exclusions = &exclusions;
this->atomLocations = &atomLocations[0];
this->periodicBoxSize = periodicBoxSize;
this->numAtoms = numAtoms;
this->usePeriodic = usePeriodic;
this->maxDistance = maxDistance;
// Identify the range of atom positions along each axis.
fvec4 minPos(&atomLocations[0]);
fvec4 maxPos = minPos;
for (int i = 0; i < numAtoms; i++) {
fvec4 pos(&atomLocations[4*i]);
minPos = min(minPos, pos);
maxPos = max(maxPos, pos);
}
minx = minPos[0];
maxx = maxPos[0];
miny = minPos[1];
maxy = maxPos[1];
minz = minPos[2];
maxz = maxPos[2];
// Sort the atoms based on a Hilbert curve.
atomBins.resize(numAtoms);
ThreadTask task(*this);
threads.execute(task);
threads.waitForThreads();
sort(atomBins.begin(), atomBins.end());
// Build the voxel hash.
float edgeSizeX, edgeSizeY;
if (!usePeriodic)
edgeSizeX = edgeSizeY = maxDistance; // TODO - adjust this as needed
else {
edgeSizeX = 0.5f*periodicBoxSize[0]/floorf(periodicBoxSize[0]/maxDistance);
edgeSizeY = 0.5f*periodicBoxSize[1]/floorf(periodicBoxSize[1]/maxDistance);
}
Voxels voxels(edgeSizeX, edgeSizeY, minx, maxx, miny, maxy, periodicBoxSize, usePeriodic);
for (int i = 0; i < numAtoms; i++) {
int atomIndex = atomBins[i].second;
sortedAtoms[i] = atomIndex;
voxels.insert(i, &atomLocations[4*atomIndex]);
}
voxels.sortItems();
this->voxels = &voxels;
// Signal the threads to start running and wait for them to finish.
threads.resumeThreads();
threads.waitForThreads();
// Add padding atoms to fill up the last block.
int numPadding = numBlocks*BlockSize-numAtoms;
if (numPadding > 0) {
char mask = (0xF0 >> numPadding) & 0xF;
for (int i = 0; i < numPadding; i++)
sortedAtoms.push_back(0);
vector<char>& exc = blockExclusions[blockExclusions.size()-1];
for (int i = 0; i < (int) exc.size(); i++)
exc[i] |= mask;
}
}
int CpuNeighborList::getNumBlocks() const {
return sortedAtoms.size()/BlockSize;
}
const std::vector<int>& CpuNeighborList::getSortedAtoms() const {
return sortedAtoms;
}
const std::vector<int>& CpuNeighborList::getBlockNeighbors(int blockIndex) const {
return blockNeighbors[blockIndex];
}
const std::vector<char>& CpuNeighborList::getBlockExclusions(int blockIndex) const {
return blockExclusions[blockIndex];
}
void CpuNeighborList::threadComputeNeighborList(ThreadPool& threads, int threadIndex) {
// Compute the positions of atoms along the Hilbert curve.
float binWidth = max(max(maxx-minx, maxy-miny), maxz-minz)/255.0f;
float invBinWidth = 1.0f/binWidth;
bitmask_t coords[3];
int numThreads = threads.getNumThreads();
for (int i = threadIndex; i < numAtoms; i += numThreads) {
const float* pos = &atomLocations[4*i];
coords[0] = (bitmask_t) ((pos[0]-minx)*invBinWidth);
coords[1] = (bitmask_t) ((pos[1]-miny)*invBinWidth);
coords[2] = (bitmask_t) ((pos[2]-minz)*invBinWidth);
int bin = (int) hilbert_c2i(3, 8, coords);
atomBins[i] = pair<int, int>(bin, i);
}
threads.syncThreads();
// Compute this thread's subset of neighbors.
int numBlocks = blockNeighbors.size();
vector<int> blockAtoms;
for (int i = threadIndex; i < numBlocks; i += numThreads) {
// Find the atoms in this block and compute their bounding box.
int firstIndex = BlockSize*i;
int atomsInBlock = min(BlockSize, numAtoms-firstIndex);
blockAtoms.resize(atomsInBlock);
for (int j = 0; j < atomsInBlock; j++)
blockAtoms[j] = sortedAtoms[firstIndex+j];
fvec4 minPos(&atomLocations[4*sortedAtoms[firstIndex]]);
fvec4 maxPos = minPos;
for (int j = 1; j < atomsInBlock; j++) {
fvec4 pos(&atomLocations[4*sortedAtoms[firstIndex+j]]);
minPos = min(minPos, pos);
maxPos = max(maxPos, pos);
}
voxels->getNeighbors(blockNeighbors[i], i, (maxPos+minPos)*0.5f, (maxPos-minPos)*0.5f, sortedAtoms, blockExclusions[i], maxDistance, blockAtoms, atomLocations);
// Record the exclusions for this block.
for (int j = 0; j < atomsInBlock; j++) {
const set<int>& atomExclusions = (*exclusions)[sortedAtoms[firstIndex+j]];
char mask = 1<<j;
for (int k = 0; k < (int) blockNeighbors[i].size(); k++) {
int atomIndex = blockNeighbors[i][k];
if (atomExclusions.find(atomIndex) != atomExclusions.end())
blockExclusions[i][k] |= mask;
}
}
}
}
} // namespace OpenMM
platforms/cpu/src/CpuNonbondedForce.cpp 0 → 100644
View file @ 8df54762
This diff is collapsed.
platforms/cpu/src/CpuPlatform.cpp 0 → 100644
View file @ 8df54762
/* -------------------------------------------------------------------------- *
* OpenMM *
* -------------------------------------------------------------------------- *
* This is part of the OpenMM molecular simulation toolkit originating from *
* Simbios, the NIH National Center for Physics-Based Simulation of *
* Biological Structures at Stanford, funded under the NIH Roadmap for *
* Medical Research, grant U54 GM072970. See https://simtk.org. *
* *
* Portions copyright (c) 2013 Stanford University and the Authors. *
* Authors: Peter Eastman *
* Contributors: *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the "Software"), *
* to deal in the Software without restriction, including without limitation *
* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
* and/or sell copies of the Software, and to permit persons to whom the *
* Software is furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included in *
* all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS, CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE *
* USE OR OTHER DEALINGS IN THE SOFTWARE. *
* -------------------------------------------------------------------------- */
#include "CpuPlatform.h"
#include "CpuKernelFactory.h"
#include "CpuKernels.h"
#include "openmm/internal/hardware.h"
using namespace OpenMM;
extern "C" OPENMM_EXPORT_CPU void registerPlatforms() {
// Only register this platform if the CPU supports SSE 4.1.
if (CpuPlatform::isProcessorSupported())
Platform::registerPlatform(new CpuPlatform());
}
CpuPlatform::CpuPlatform() {
CpuKernelFactory* factory = new CpuKernelFactory();
registerKernelFactory(CalcNonbondedForceKernel::Name(), factory);
}
double CpuPlatform::getSpeed() const {
return 10;
}
bool CpuPlatform::supportsDoublePrecision() const {
return false;
}
bool CpuPlatform::isProcessorSupported() {
// Make sure the CPU supports SSE 4.1.
int cpuInfo[4];
cpuid(cpuInfo, 0);
if (cpuInfo[0] >= 1) {
cpuid(cpuInfo, 1);
return ((cpuInfo[2] & ((int) 1 << 19)) != 0);
}
return false;
}
platforms/cpu/tests/CMakeLists.txt 0 → 100644
View file @ 8df54762
#
# Testing
#
ENABLE_TESTING()
SET( INCLUDE_SERIALIZATION FALSE )
#SET( INCLUDE_SERIALIZATION TRUE )
IF( INCLUDE_SERIALIZATION )
INCLUDE_DIRECTORIES(${OPENMM_DIR}/serialization/include)
SET( SHARED_OPENMM_SERIALIZATION "OpenMMSerialization" )
ENDIF( INCLUDE_SERIALIZATION )
# Automatically create tests using files named "Test*.cpp"
FILE(GLOB TEST_PROGS "*Test*.cpp")
FOREACH(TEST_PROG ${TEST_PROGS})
GET_FILENAME_COMPONENT(TEST_ROOT ${TEST_PROG} NAME_WE)
# Link with shared library
ADD_EXECUTABLE(${TEST_ROOT} ${TEST_PROG})
TARGET_LINK_LIBRARIES(${TEST_ROOT} ${SHARED_TARGET})
ADD_TEST(${TEST_ROOT} ${EXECUTABLE_OUTPUT_PATH}/${TEST_ROOT} single)
ENDFOREACH(TEST_PROG ${TEST_PROGS})
platforms/cpu/tests/TestCpuEwald.cpp 0 → 100644
View file @ 8df54762
/* -------------------------------------------------------------------------- *
* OpenMM *
* -------------------------------------------------------------------------- *
* This is part of the OpenMM molecular simulation toolkit originating from *
* Simbios, the NIH National Center for Physics-Based Simulation of *
* Biological Structures at Stanford, funded under the NIH Roadmap for *
* Medical Research, grant U54 GM072970. See https://simtk.org. *
* *
* Portions copyright (c) 2008-2013 Stanford University and the Authors. *
* Authors: Peter Eastman *
* Contributors: *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the "Software"), *
* to deal in the Software without restriction, including without limitation *
* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
* and/or sell copies of the Software, and to permit persons to whom the *
* Software is furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included in *
* all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS, CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE *
* USE OR OTHER DEALINGS IN THE SOFTWARE. *
* -------------------------------------------------------------------------- */
/**
* This tests the Ewald summation method CPU implementation of NonbondedForce.
*/
#include "openmm/internal/AssertionUtilities.h"
#include "openmm/Context.h"
#include "CpuPlatform.h"
#include "ReferencePlatform.h"
#include "openmm/NonbondedForce.h"
#include "openmm/System.h"
#include "openmm/LangevinIntegrator.h"
#include "openmm/VerletIntegrator.h"
#include "openmm/internal/ContextImpl.h"
#include "SimTKOpenMMRealType.h"
#include "sfmt/SFMT.h"
#include <iostream>
#include <vector>
using namespace OpenMM;
using namespace std;
CpuPlatform platform;
const double TOL = 1e-5;
void testEwaldPME(bool includeExceptions) {
// Use amorphous NaCl system for the tests
const int numParticles = 894;
const double cutoff = 1.2;
const double boxSize = 3.00646;
double tol = 1e-5;
ReferencePlatform reference;
System system;
NonbondedForce* nonbonded = new NonbondedForce();
nonbonded->setNonbondedMethod(NonbondedForce::Ewald);
nonbonded->setCutoffDistance(cutoff);
nonbonded->setEwaldErrorTolerance(tol);
for (int i = 0; i < numParticles/2; i++)
system.addParticle(22.99);
for (int i = 0; i < numParticles/2; i++)
system.addParticle(35.45);
for (int i = 0; i < numParticles/2; i++)
nonbonded->addParticle(1.0, 1.0,0.0);
for (int i = 0; i < numParticles/2; i++)
nonbonded->addParticle(-1.0, 1.0,0.0);
system.setDefaultPeriodicBoxVectors(Vec3(boxSize, 0, 0), Vec3(0, boxSize, 0), Vec3(0, 0, boxSize));
system.addForce(nonbonded);
vector<Vec3> positions(numParticles);
#include "nacl_amorph.dat"
if (includeExceptions) {
// Add some exclusions.
for (int i = 0; i < numParticles-1; i++) {
Vec3 delta = positions[i]-positions[i+1];
if (sqrt(delta.dot(delta)) < 0.5*cutoff)
nonbonded->addException(i, i+1, i%2 == 0 ? 0.0 : 0.5, 1.0, 0.0);
}
}
// (1) Check whether the Reference and CPU platforms agree when using Ewald Method
VerletIntegrator integrator1(0.01);
VerletIntegrator integrator2(0.01);
Context cpuContext(system, integrator1, platform);
Context referenceContext(system, integrator2, reference);
cpuContext.setPositions(positions);
referenceContext.setPositions(positions);
State cpuState = cpuContext.getState(State::Forces | State::Energy);
State referenceState = referenceContext.getState(State::Forces | State::Energy);
tol = 1e-2;
for (int i = 0; i < numParticles; i++) {
ASSERT_EQUAL_VEC(referenceState.getForces()[i], cpuState.getForces()[i], tol);
}
tol = 1e-5;
ASSERT_EQUAL_TOL(referenceState.getPotentialEnergy(), cpuState.getPotentialEnergy(), tol);
// (2) Check whether Ewald method in CPU is self-consistent
double norm = 0.0;
for (int i = 0; i < numParticles; ++i) {
Vec3 f = cpuState.getForces()[i];
norm += f[0]*f[0] + f[1]*f[1] + f[2]*f[2];
}
norm = std::sqrt(norm);
const double delta = 5e-3;
double step = delta/norm;
for (int i = 0; i < numParticles; ++i) {
Vec3 p = positions[i];
Vec3 f = cpuState.getForces()[i];
positions[i] = Vec3(p[0]-f[0]*step, p[1]-f[1]*step, p[2]-f[2]*step);
}
VerletIntegrator integrator3(0.01);
Context cpuContext2(system, integrator3, platform);
cpuContext2.setPositions(positions);
tol = 1e-2;
State cpuState2 = cpuContext2.getState(State::Energy);
ASSERT_EQUAL_TOL(norm, (cpuState2.getPotentialEnergy()-cpuState.getPotentialEnergy())/delta, tol)
// (3) Check whether the Reference and CPU platforms agree when using PME
nonbonded->setNonbondedMethod(NonbondedForce::PME);
cpuContext.reinitialize();
referenceContext.reinitialize();
cpuContext.setPositions(positions);
referenceContext.setPositions(positions);
cpuState = cpuContext.getState(State::Forces | State::Energy);
referenceState = referenceContext.getState(State::Forces | State::Energy);
tol = 1e-2;
for (int i = 0; i < numParticles; i++) {
ASSERT_EQUAL_VEC(referenceState.getForces()[i], cpuState.getForces()[i], tol);
}
tol = 1e-5;
ASSERT_EQUAL_TOL(referenceState.getPotentialEnergy(), cpuState.getPotentialEnergy(), tol);
// (4) Check whether PME method in CPU is self-consistent
norm = 0.0;
for (int i = 0; i < numParticles; ++i) {
Vec3 f = cpuState.getForces()[i];
norm += f[0]*f[0] + f[1]*f[1] + f[2]*f[2];
}
norm = std::sqrt(norm);
step = delta/norm;
for (int i = 0; i < numParticles; ++i) {
Vec3 p = positions[i];
Vec3 f = cpuState.getForces()[i];
positions[i] = Vec3(p[0]-f[0]*step, p[1]-f[1]*step, p[2]-f[2]*step);
}
VerletIntegrator integrator4(0.01);
Context cpuContext3(system, integrator4, platform);
cpuContext3.setPositions(positions);
tol = 1e-2;
State cpuState3 = cpuContext3.getState(State::Energy);
ASSERT_EQUAL_TOL(norm, (cpuState3.getPotentialEnergy()-cpuState.getPotentialEnergy())/delta, tol)
}
void testEwald2Ions() {
System system;
system.addParticle(1.0);
system.addParticle(1.0);
VerletIntegrator integrator(0.01);
NonbondedForce* nonbonded = new NonbondedForce();
nonbonded->addParticle(1.0, 1, 0);
nonbonded->addParticle(-1.0, 1, 0);
nonbonded->setNonbondedMethod(NonbondedForce::Ewald);
const double cutoff = 2.0;
nonbonded->setCutoffDistance(cutoff);
nonbonded->setEwaldErrorTolerance(TOL);
system.setDefaultPeriodicBoxVectors(Vec3(6, 0, 0), Vec3(0, 6, 0), Vec3(0, 0, 6));
system.addForce(nonbonded);
Context context(system, integrator, platform);
vector<Vec3> positions(2);
positions[0] = Vec3(3.048000,2.764000,3.156000);
positions[1] = Vec3(2.809000,2.888000,2.571000);
context.setPositions(positions);
State state = context.getState(State::Forces | State::Energy);
const vector<Vec3>& forces = state.getForces();
ASSERT_EQUAL_VEC(Vec3(-123.711, 64.1877, -302.716), forces[0], 10*TOL);
ASSERT_EQUAL_VEC(Vec3( 123.711, -64.1877, 302.716), forces[1], 10*TOL);
ASSERT_EQUAL_TOL(-217.276, state.getPotentialEnergy(), 0.01/*10*TOL*/);
}
void testErrorTolerance(NonbondedForce::NonbondedMethod method) {
// Create a cloud of random point charges.
const int numParticles = 51;
const double boxWidth = 5.0;
System system;
system.setDefaultPeriodicBoxVectors(Vec3(boxWidth, 0, 0), Vec3(0, boxWidth, 0), Vec3(0, 0, boxWidth));
NonbondedForce* force = new NonbondedForce();
system.addForce(force);
vector<Vec3> positions(numParticles);
OpenMM_SFMT::SFMT sfmt;
init_gen_rand(0, sfmt);
for (int i = 0; i < numParticles; i++) {
system.addParticle(1.0);
force->addParticle(-1.0+i*2.0/(numParticles-1), 1.0, 0.0);
positions[i] = Vec3(boxWidth*genrand_real2(sfmt), boxWidth*genrand_real2(sfmt), boxWidth*genrand_real2(sfmt));
}
force->setNonbondedMethod(method);
// For various values of the cutoff and error tolerance, see if the actual error is reasonable.
for (double cutoff = 1.0; cutoff < boxWidth/2; cutoff *= 1.2) {
force->setCutoffDistance(cutoff);
vector<Vec3> refForces;
double norm = 0.0;
for (double tol = 5e-5; tol < 1e-3; tol *= 2.0) {
force->setEwaldErrorTolerance(tol);
VerletIntegrator integrator(0.01);
Context context(system, integrator, platform);
context.setPositions(positions);
State state = context.getState(State::Forces);
if (refForces.size() == 0) {
refForces = state.getForces();
for (int i = 0; i < numParticles; i++)
norm += refForces[i].dot(refForces[i]);
norm = sqrt(norm);
}
else {
double diff = 0.0;
for (int i = 0; i < numParticles; i++) {
Vec3 delta = refForces[i]-state.getForces()[i];
diff += delta.dot(delta);
}
diff = sqrt(diff)/norm;
ASSERT(diff < 2*tol);
}
}
}
}
int main(int argc, char* argv[]) {
try {
if (!CpuPlatform::isProcessorSupported()) {
cout << "CPU is not supported. Exiting." << endl;
return 0;
}
testEwaldPME(false);
testEwaldPME(true);
// testEwald2Ions();
testErrorTolerance(NonbondedForce::Ewald);
testErrorTolerance(NonbondedForce::PME);
}
catch(const exception& e) {
cout << "exception: " << e.what() << endl;
return 1;
}
cout << "Done" << endl;
return 0;
}
platforms/cpu/tests/TestCpuNeighborList.cpp 0 → 100644
View file @ 8df54762
/* -------------------------------------------------------------------------- *
* OpenMM *
* -------------------------------------------------------------------------- *
* This is part of the OpenMM molecular simulation toolkit originating from *
* Simbios, the NIH National Center for Physics-Based Simulation of *
* Biological Structures at Stanford, funded under the NIH Roadmap for *
* Medical Research, grant U54 GM072970. See https://simtk.org. *
* *
* Portions copyright (c) 2013 Stanford University and the Authors. *
* Authors: Peter Eastman *
* Contributors: *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the "Software"), *
* to deal in the Software without restriction, including without limitation *
* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
* and/or sell copies of the Software, and to permit persons to whom the *
* Software is furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included in *
* all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS, CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE *
* USE OR OTHER DEALINGS IN THE SOFTWARE. *
* -------------------------------------------------------------------------- */
/**
* This tests all the CPU implementation of neighbor list construction.
*/
#include "openmm/internal/AssertionUtilities.h"
#include "openmm/internal/ThreadPool.h"
#include "CpuNeighborList.h"
#include "CpuPlatform.h"
#include "sfmt/SFMT.h"
#include <iostream>
#include <set>
#include <utility>
#include <vector>
using namespace OpenMM;
using namespace std;
void testNeighborList(bool periodic) {
const int numParticles = 500;
const float cutoff = 2.0f;
const float boxSize[3] = {20.0f, 15.0f, 22.0f};
OpenMM_SFMT::SFMT sfmt;
init_gen_rand(0, sfmt);
vector<float> positions(4*numParticles);
for (int i = 0; i < 4*numParticles; i++)
if (i%4 < 3)
positions[i] = boxSize[i%4]*genrand_real2(sfmt);
vector<set<int> > exclusions(numParticles);
for (int i = 0; i < numParticles; i++) {
int num = min(i+1, 10);
for (int j = 0; j < num; j++) {
exclusions[i].insert(i-j);
exclusions[i-j].insert(i);
}
}
ThreadPool threads;
CpuNeighborList neighborList;
neighborList.computeNeighborList(numParticles, positions, exclusions, boxSize, periodic, cutoff, threads);
// Convert the neighbor list to a set for faster lookup.
set<pair<int, int> > neighbors;
for (int i = 0; i < (int) neighborList.getSortedAtoms().size(); i++) {
int blockIndex = i/CpuNeighborList::BlockSize;
int indexInBlock = i-blockIndex*CpuNeighborList::BlockSize;
char mask = 1<<indexInBlock;
for (int j = 0; j < (int) neighborList.getBlockExclusions(blockIndex).size(); j++) {
if ((neighborList.getBlockExclusions(blockIndex)[j] & mask) == 0) {
int atom1 = neighborList.getSortedAtoms()[i];
int atom2 = neighborList.getBlockNeighbors(blockIndex)[j];
pair<int, int> entry = make_pair(min(atom1, atom2), max(atom1, atom2));
ASSERT(neighbors.find(entry) == neighbors.end() && neighbors.find(make_pair(entry.second, entry.first)) == neighbors.end()); // No duplicates
neighbors.insert(entry);
}
}
}
// Check each particle pair and figure out whether they should be in the neighbor list.
for (int i = 0; i < numParticles; i++)
for (int j = 0; j <= i; j++) {
bool shouldInclude = (exclusions[i].find(j) == exclusions[i].end());
float dx = positions[4*i]-positions[4*j];
float dy = positions[4*i+1]-positions[4*j+1];
float dz = positions[4*i+2]-positions[4*j+2];
if (periodic) {
dx -= floor(dx/boxSize[0]+0.5f)*boxSize[0];
dy -= floor(dy/boxSize[1]+0.5f)*boxSize[1];
dz -= floor(dz/boxSize[2]+0.5f)*boxSize[2];
}
if (dx*dx + dy*dy + dz*dz > cutoff*cutoff)
shouldInclude = false;
bool isIncluded = (neighbors.find(make_pair(i, j)) != neighbors.end() || neighbors.find(make_pair(j, i)) != neighbors.end());
if (shouldInclude)
ASSERT(isIncluded);
}
}
int main() {
try {
if (!CpuPlatform::isProcessorSupported()) {
cout << "CPU is not supported. Exiting." << endl;
return 0;
}
testNeighborList(false);
testNeighborList(true);
}
catch(const exception& e) {
cout << "exception: " << e.what() << endl;
return 1;
}
cout << "Done" << endl;
return 0;
}
platforms/cpu/tests/TestCpuNonbondedForce.cpp 0 → 100644
View file @ 8df54762
This diff is collapsed.
platforms/cpu/tests/nacl_amorph.dat 0 → 100644
View file @ 8df54762
This diff is collapsed.
platforms/cuda/src/CudaIntegrationUtilities.cpp
View file @ 8df54762
......@@ -123,15 +123,21 @@ CudaIntegrationUtilities::CudaIntegrationUtilities(CudaContext& context, const S
// Record the set of constraints and how many constraints each atom is involved in.
int numConstraints = system.getNumConstraints();
vector<int> atom1(numConstraints);
vector<int> atom2(numConstraints);
vector<double> distance(numConstraints);
vector<int> atom1;
vector<int> atom2;
vector<double> distance;
vector<int> constraintCount(context.getNumAtoms(), 0);
for (int i = 0; i < numConstraints; i++) {
system.getConstraintParameters(i, atom1[i], atom2[i], distance[i]);
constraintCount[atom1[i]]++;
constraintCount[atom2[i]]++;
for (int i = 0; i < system.getNumConstraints(); i++) {
int p1, p2;
double d;
system.getConstraintParameters(i, p1, p2, d);
if (system.getParticleMass(p1) != 0 || system.getParticleMass(p2) != 0) {
atom1.push_back(p1);
atom2.push_back(p2);
distance.push_back(d);
constraintCount[p1]++;
constraintCount[p2]++;
}
}
// Identify clusters of three atoms that can be treated with SETTLE. First, for every
......
platforms/cuda/src/CudaKernels.cpp
View file @ 8df54762
......@@ -5752,7 +5752,7 @@ void CudaRemoveCMMotionKernel::initialize(const System& system, const CMMotionRe
for (int i = 0; i < numAtoms; i++)
totalMass += system.getParticleMass(i);
map<string, string> defines;
defines["INVERSE_TOTAL_MASS"] = cu.doubleToString(1.0/totalMass);
defines["INVERSE_TOTAL_MASS"] = cu.doubleToString(totalMass == 0 ? 0.0 : 1.0/totalMass);
CUmodule module = cu.createModule(CudaKernelSources::removeCM, defines);
kernel1 = cu.getKernel(module, "calcCenterOfMassMomentum");
kernel2 = cu.getKernel(module, "removeCenterOfMassMomentum");
......
platforms/cuda/src/kernels/gbsaObc1.cu
View file @ 8df54762
......@@ -468,11 +468,16 @@ extern "C" __global__ void computeGBSAForce1(unsigned long long* __restrict__ fo
real expTerm = EXP(-D_ij);
real denominator2 = r2 + alpha2_ij*expTerm;
real denominator = SQRT(denominator2);
real tempEnergy = (PREFACTOR*posq1.w*posq2.w)*RECIP(denominator);
real scaledChargeProduct = PREFACTOR*posq1.w*posq2.w;
real tempEnergy = scaledChargeProduct*RECIP(denominator);
real Gpol = tempEnergy*RECIP(denominator2);
real dGpol_dalpha2_ij = -0.5f*Gpol*expTerm*(1.0f+D_ij);
real dEdR = Gpol*(1.0f - 0.25f*expTerm);
force.w += dGpol_dalpha2_ij*bornRadius2;
#ifdef USE_CUTOFF
if (atom1 != y*TILE_SIZE+j)
tempEnergy -= scaledChargeProduct/CUTOFF;
#endif
energy += 0.5f*tempEnergy;
delta *= dEdR;
force.x -= delta.x;
......@@ -520,11 +525,15 @@ extern "C" __global__ void computeGBSAForce1(unsigned long long* __restrict__ fo
real expTerm = EXP(-D_ij);
real denominator2 = r2 + alpha2_ij*expTerm;
real denominator = SQRT(denominator2);
real tempEnergy = (PREFACTOR*posq1.w*posq2.w)*RECIP(denominator);
real scaledChargeProduct = PREFACTOR*posq1.w*posq2.w;
real tempEnergy = scaledChargeProduct*RECIP(denominator);
real Gpol = tempEnergy*RECIP(denominator2);
real dGpol_dalpha2_ij = -0.5f*Gpol*expTerm*(1.0f+D_ij);
real dEdR = Gpol*(1.0f - 0.25f*expTerm);
force.w += dGpol_dalpha2_ij*bornRadius2;
#ifdef USE_CUTOFF
tempEnergy -= scaledChargeProduct/CUTOFF;
#endif
energy += tempEnergy;
delta *= dEdR;
force.x -= delta.x;
......@@ -670,11 +679,15 @@ extern "C" __global__ void computeGBSAForce1(unsigned long long* __restrict__ fo
real expTerm = EXP(-D_ij);
real denominator2 = r2 + alpha2_ij*expTerm;
real denominator = SQRT(denominator2);
real tempEnergy = (PREFACTOR*posq1.w*posq2.w)*RECIP(denominator);
real scaledChargeProduct = PREFACTOR*posq1.w*posq2.w;
real tempEnergy = scaledChargeProduct*RECIP(denominator);
real Gpol = tempEnergy*RECIP(denominator2);
real dGpol_dalpha2_ij = -0.5f*Gpol*expTerm*(1.0f+D_ij);
real dEdR = Gpol*(1.0f - 0.25f*expTerm);
force.w += dGpol_dalpha2_ij*bornRadius2;
#ifdef USE_CUTOFF
tempEnergy -= scaledChargeProduct/CUTOFF;
#endif
energy += tempEnergy;
delta *= dEdR;
force.x -= delta.x;
......@@ -717,11 +730,15 @@ extern "C" __global__ void computeGBSAForce1(unsigned long long* __restrict__ fo
real expTerm = EXP(-D_ij);
real denominator2 = r2 + alpha2_ij*expTerm;
real denominator = SQRT(denominator2);
real tempEnergy = (PREFACTOR*posq1.w*posq2.w)*RECIP(denominator);
real scaledChargeProduct = PREFACTOR*posq1.w*posq2.w;
real tempEnergy = scaledChargeProduct*RECIP(denominator);
real Gpol = tempEnergy*RECIP(denominator2);
real dGpol_dalpha2_ij = -0.5f*Gpol*expTerm*(1.0f+D_ij);
real dEdR = Gpol*(1.0f - 0.25f*expTerm);
force.w += dGpol_dalpha2_ij*bornRadius2;
#ifdef USE_CUTOFF
tempEnergy -= scaledChargeProduct/CUTOFF;
#endif
energy += tempEnergy;
delta *= dEdR;
force.x -= delta.x;
......
platforms/cuda/tests/TestCudaBrownianIntegrator.cpp
View file @ 8df54762
......@@ -172,6 +172,37 @@ void testConstraints() {
}
}
void testConstrainedMasslessParticles() {
System system;
system.addParticle(0.0);
system.addParticle(1.0);
system.addConstraint(0, 1, 1.5);
vector<Vec3> positions(2);
positions[0] = Vec3(-1, 0, 0);
positions[1] = Vec3(1, 0, 0);
BrownianIntegrator integrator(300.0, 2.0, 0.01);
bool failed = false;
try {
// This should throw an exception.
Context context(system, integrator, platform);
}
catch (exception& ex) {
failed = true;
}
ASSERT(failed);
// Now make both particles massless, which should work.
system.setParticleMass(1, 0.0);
Context context(system, integrator, platform);
context.setPositions(positions);
context.setVelocitiesToTemperature(300.0);
integrator.step(1);
State state = context.getState(State::Velocities);
ASSERT_EQUAL(0.0, state.getVelocities()[0][0]);
}
void testRandomSeed() {
const int numParticles = 8;
const double temp = 100.0;
......@@ -237,6 +268,7 @@ int main(int argc, char* argv[]) {
testSingleBond();
testTemperature();
testConstraints();
testConstrainedMasslessParticles();
testRandomSeed();
}
catch(const exception& e) {
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment