kernel_cache.cpp

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/* ************************************************************************
 * Copyright 2015 Vratis, Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
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 * ************************************************************************ */

#include <env.hpp>
#include <kernel_cache.hpp>
#include <stringutils.hpp>

#include <iostream>
#include <iterator>

namespace olCompile {

const std::vector<Kernel>& KernelCache::GetKernels(const std::string& algorithm,
                                                   const std::string& network_config)
{

    std::pair<std::string, std::string> key = std::make_pair(algorithm, network_config);

    const auto it = kernel_map.find(key);
    if(it != kernel_map.end())
    {
        return it->second;
    }

    static const std::vector<Kernel> empty{};
    return empty;
}

bool KernelCache::HasKernels(const std::string& algorithm, const std::string& network_config) const
{
    const auto key = std::make_pair(algorithm, network_config);
    const auto it  = kernel_map.find(key);
    if(it == kernel_map.end())
        return false;

    if(it->second.empty())
    {
        throw std::runtime_error(
            "There should be at least one kernel in kernel cache if an entry exists");
    }

    return true;
}

bool KernelCache::HasProgram(const std::string& name, const std::string& params) const
{
    const auto key = std::make_pair(name, params);
    return program_map.count(key) > 0;
}

void KernelCache::AddProgram(Program prog, const std::string& program_name, std::string params)
{
    program_map[std::make_pair(program_name, params)] = prog;
}

Kernel KernelCache::AddKernel(const Handle& h,
                              const std::string& algorithm,
                              const std::string& network_config,
                              const std::string& program_name,
                              const std::string& kernel_name,
                              const std::vector<size_t>& vld,
                              const std::vector<size_t>& vgd,
                              std::string params,
                              std::size_t cache_index)
{
    const std::pair<std::string, std::string> key = std::make_pair(algorithm, network_config);

    Program program;

    auto program_it = program_map.find(std::make_pair(program_name, params));
    if(program_it != program_map.end())
    {
        program = program_it->second;
    }
    else
    {
        program                                           = h.LoadProgram(program_name, params);
        program_map[std::make_pair(program_name, params)] = program;
    }

    Kernel kernel{};

    kernel = Kernel{program, kernel_name, vld, vgd};

    if(!network_config.empty() && !algorithm.empty())
    {
        this->AddKernel(key, kernel, cache_index);
    }
    return kernel;
}

void KernelCache::AddKernel(Key key, Kernel k, std::size_t cache_index)
{
    auto&& v = kernel_map[key];
    if(cache_index >= v.size())
    {
        v.resize(cache_index + 1);
    }
    v[cache_index] = k;
}

void KernelCache::ClearKernels(const std::string& algorithm, const std::string& network_config)
{
    if(network_config.empty() || algorithm.empty())
    {
        throw std::runtime_error("Network config or algorithm empty.");
    }
    const std::pair<std::string, std::string> key = std::make_pair(algorithm, network_config);
    auto&& v                                      = this->kernel_map[key];
    if(!v.empty()) {}
    v.clear();
}

KernelCache::KernelCache() {}

} // namespace olCompile