[aarch64] Fix for pytorch-2.1.0 aarch64 wheels crash on A1/Raspberry Pie

aarch64_linux/aarch64_wheel_ci_build.py

@@ -21,11 +21,8 @@ def build_ArmComputeLibrary(git_clone_flags: str = "") -> None:
     print('Building Arm Compute Library')
     os.system("cd / && mkdir /acl")
     os.system(f"git clone https://github.com/ARM-software/ComputeLibrary.git -b v23.05.1 {git_clone_flags}")
-    os.system('sed -i -e \'s/"armv8.2-a"/"armv8-a"/g\' ComputeLibrary/SConscript; '
-              'sed -i -e \'s/-march=armv8.2-a+fp16/-march=armv8-a/g\' ComputeLibrary/SConstruct; '
-              'sed -i -e \'s/"-march=armv8.2-a"/"-march=armv8-a"/g\' ComputeLibrary/filedefs.json')
     os.system("cd ComputeLibrary; export acl_install_dir=/acl; "
-              "scons Werror=1 -j8 debug=0 neon=1 opencl=0 os=linux openmp=1 cppthreads=0 arch=armv8.2-a multi_isa=1 build=native build_dir=$acl_install_dir/build; "
+              "scons Werror=1 -j8 debug=0 neon=1 opencl=0 os=linux openmp=1 cppthreads=0 arch=armv8a multi_isa=1 build=native build_dir=$acl_install_dir/build; "
               "cp -r arm_compute $acl_install_dir; "
               "cp -r include $acl_install_dir; "
               "cp -r utils $acl_install_dir; "
@@ -108,6 +105,9 @@ def parse_arguments():
     else:
         print("build pytorch without mkldnn backend")
 
+    # work around to fix Raspberry pie crash
+    print("Applying mkl-dnn patch to fix Raspberry pie crash")
+    os.system(f"cd /pytorch/third_party/ideep/mkl-dnn && patch -p1 < /builder/mkldnn_fix/aarch64-fix-default-build-flags-to-armv8-a.patch")
     os.system(f"cd /pytorch; {build_vars} python3 setup.py bdist_wheel")
     pytorch_wheel_name = complete_wheel("pytorch")
     print(f"Build Compelete. Created {pytorch_wheel_name}..")

aarch64_linux/build_aarch64_wheel.py

@@ -557,7 +557,9 @@ def start_build(host: RemoteHost, *,
         build_ArmComputeLibrary(host, git_clone_flags)
         print("build pytorch with mkldnn+acl backend")
         build_vars += " USE_MKLDNN=ON USE_MKLDNN_ACL=ON"
-        host.run_cmd(f"cd pytorch && export ACL_ROOT_DIR=$HOME/ComputeLibrary && {build_vars} python3 setup.py bdist_wheel{build_opts}")
+        host.run_cmd(f"cd $HOME && git clone https://github.com/pytorch/builder.git")
+        host.run_cmd(f"cd $HOME/pytorch/third_party/ideep/mkl-dnn && patch -p1 < $HOME/builder/mkldnn_fix/aarch64-fix-default-build-flags-to-armv8-a.patch")
+        host.run_cmd(f"cd $HOME/pytorch && export ACL_ROOT_DIR=$HOME/ComputeLibrary && {build_vars} python3 setup.py bdist_wheel{build_opts}")
         print('Repair the wheel')
         pytorch_wheel_name = host.list_dir("pytorch/dist")[0]
         host.run_cmd(f"export LD_LIBRARY_PATH=$HOME/acl/build:$HOME/pytorch/build/lib && auditwheel repair $HOME/pytorch/dist/{pytorch_wheel_name}")

mkldnn_fix/aarch64-fix-default-build-flags-to-armv8-a.patch

@@ -0,0 +1,29 @@
+---
+ cmake/platform.cmake | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/cmake/platform.cmake b/cmake/platform.cmake
+index 8630460ce..602eafe8e 100644
+--- a/cmake/platform.cmake
++++ b/cmake/platform.cmake
+@@ -198,7 +198,7 @@ elseif(UNIX OR MINGW)
+              endif()
+              # For native compilation tune for the host processor
+              if (CMAKE_SYSTEM_PROCESSOR STREQUAL CMAKE_HOST_SYSTEM_PROCESSOR)
+-                 append(DEF_ARCH_OPT_FLAGS "-mcpu=native")
++                 append(DEF_ARCH_OPT_FLAGS "-march=armv8-a")
+              endif()
+         elseif(DNNL_TARGET_ARCH STREQUAL "PPC64")
+              if (NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
+@@ -295,7 +295,7 @@ elseif(UNIX OR MINGW)
+             endif()
+             # For native compilation tune for the host processor
+             if (CMAKE_SYSTEM_PROCESSOR STREQUAL CMAKE_HOST_SYSTEM_PROCESSOR)
+-                append(DEF_ARCH_OPT_FLAGS "-mcpu=native")
++                append(DEF_ARCH_OPT_FLAGS "-march=armv8-a")
+             endif()
+         elseif(DNNL_TARGET_ARCH STREQUAL "PPC64")
+             if (NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
+-- 
+2.34.1
+