only add 1bit adam reqs if mpi is installed, update cond build for cpu-adam (#400)

setup.py

@@ -10,8 +10,10 @@ The wheel will be located at: dist/*.whl
 
 import os
 import torch
+import shutil
 import subprocess
 import warnings
+import cpufeature
 from setuptools import setup, find_packages
 from torch.utils.cpp_extension import CUDAExtension, BuildExtension, CppExtension
 
@@ -27,47 +29,53 @@ install_requires = fetch_requirements('requirements/requirements.txt')
 dev_requires = fetch_requirements('requirements/requirements-dev.txt')
 sparse_attn_requires = fetch_requirements('requirements/requirements-sparse-attn.txt')
 
-onebit_adam_requires = fetch_requirements('requirements/requirements-1bit-adam.txt')
+# If MPI is available add 1bit-adam requirements
 if torch.cuda.is_available():
-    onebit_adam_requires.append(f"cupy-cuda{torch.version.cuda.replace('.','')[:3]}")
-install_requires += onebit_adam_requires
+    if shutil.which('ompi_info') or shutil.which('mpiname'):
+        onebit_adam_requires = fetch_requirements(
+            'requirements/requirements-1bit-adam.txt')
+        onebit_adam_requires.append(f"cupy-cuda{torch.version.cuda.replace('.','')[:3]}")
+        install_requires += onebit_adam_requires
 
 # Constants for each op
 LAMB = "lamb"
 TRANSFORMER = "transformer"
 SPARSE_ATTN = "sparse-attn"
-ADAM = "cpu-adam"
+CPU_ADAM = "cpu-adam"
 
 # Build environment variables for custom builds
 DS_BUILD_LAMB_MASK = 1
 DS_BUILD_TRANSFORMER_MASK = 10
 DS_BUILD_SPARSE_ATTN_MASK = 100
-DS_BUILD_ADAM_MASK = 1000
+DS_BUILD_CPU_ADAM_MASK = 1000
 DS_BUILD_AVX512_MASK = 10000
 
 # Allow for build_cuda to turn on or off all ops
-DS_BUILD_ALL_OPS = DS_BUILD_LAMB_MASK | DS_BUILD_TRANSFORMER_MASK | DS_BUILD_SPARSE_ATTN_MASK | DS_BUILD_ADAM_MASK | DS_BUILD_AVX512_MASK
+DS_BUILD_ALL_OPS = DS_BUILD_LAMB_MASK | DS_BUILD_TRANSFORMER_MASK | DS_BUILD_SPARSE_ATTN_MASK | DS_BUILD_CPU_ADAM_MASK | DS_BUILD_AVX512_MASK
 DS_BUILD_CUDA = int(os.environ.get('DS_BUILD_CUDA', 1)) * DS_BUILD_ALL_OPS
 
 # Set default of each op based on if build_cuda is set
 OP_DEFAULT = DS_BUILD_CUDA == DS_BUILD_ALL_OPS
-DS_BUILD_ADAM = int(os.environ.get('DS_BUILD_ADAM', OP_DEFAULT)) * DS_BUILD_ADAM_MASK
+DS_BUILD_CPU_ADAM = int(os.environ.get('DS_BUILD_CPU_ADAM',
+                                       OP_DEFAULT)) * DS_BUILD_CPU_ADAM_MASK
 DS_BUILD_LAMB = int(os.environ.get('DS_BUILD_LAMB', OP_DEFAULT)) * DS_BUILD_LAMB_MASK
 DS_BUILD_TRANSFORMER = int(os.environ.get('DS_BUILD_TRANSFORMER',
                                           OP_DEFAULT)) * DS_BUILD_TRANSFORMER_MASK
 DS_BUILD_SPARSE_ATTN = int(os.environ.get('DS_BUILD_SPARSE_ATTN',
-                                          0)) * DS_BUILD_SPARSE_ATTN_MASK
-DS_BUILD_AVX512 = int(os.environ.get('DS_BUILD_AVX512', 0)) * DS_BUILD_AVX512_MASK
+                                          OP_DEFAULT)) * DS_BUILD_SPARSE_ATTN_MASK
+DS_BUILD_AVX512 = int(os.environ.get(
+    'DS_BUILD_AVX512',
+    cpufeature.CPUFeature['AVX512f'])) * DS_BUILD_AVX512_MASK
 
 # Final effective mask is the bitwise OR of each op
 BUILD_MASK = (DS_BUILD_LAMB | DS_BUILD_TRANSFORMER | DS_BUILD_SPARSE_ATTN
-              | DS_BUILD_ADAM)
+              | DS_BUILD_CPU_ADAM)
 
-install_ops = dict.fromkeys([LAMB, TRANSFORMER, SPARSE_ATTN, ADAM], False)
+install_ops = dict.fromkeys([LAMB, TRANSFORMER, SPARSE_ATTN, CPU_ADAM], False)
 if BUILD_MASK & DS_BUILD_LAMB:
     install_ops[LAMB] = True
-if BUILD_MASK & DS_BUILD_ADAM:
-    install_ops[ADAM] = True
+if BUILD_MASK & DS_BUILD_CPU_ADAM:
+    install_ops[CPU_ADAM] = True
 if BUILD_MASK & DS_BUILD_TRANSFORMER:
     install_ops[TRANSFORMER] = True
 if BUILD_MASK & DS_BUILD_SPARSE_ATTN:
@@ -103,9 +111,7 @@ if (TORCH_MAJOR > 1) or (TORCH_MAJOR == 1 and TORCH_MINOR > 4):
     version_ge_1_5 = ['-DVERSION_GE_1_5']
 version_dependent_macros = version_ge_1_1 + version_ge_1_3 + version_ge_1_5
 
-import cpufeature
 cpu_info = cpufeature.CPUFeature
-
 SIMD_WIDTH = ''
 if cpu_info['AVX512f'] and DS_BUILD_AVX512:
     SIMD_WIDTH = '-D__AVX512__'
@@ -133,7 +139,7 @@ if BUILD_MASK & DS_BUILD_LAMB:
                       }))
 
 ## Adam ##
-if BUILD_MASK & DS_BUILD_ADAM:
+if BUILD_MASK & DS_BUILD_CPU_ADAM:
     ext_modules.append(
         CUDAExtension(name='deepspeed.ops.adam.cpu_adam_op',
                       sources=[