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https://github.com/saymrwulf/pytorch.git
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b5594f7df0
This reverts commit 716b3b893d.
Reverted https://github.com/pytorch/pytorch/pull/103725 on behalf of https://github.com/osalpekar due to Broke caffe2 builds due. More info at [D46920675](https://www.internalfb.com/diff/D46920675) ([comment](https://github.com/pytorch/pytorch/pull/103725#issuecomment-1603129273))
80 lines
2.3 KiB
C++
80 lines
2.3 KiB
C++
#include "caffe2/core/common.h"
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#include "caffe2/core/flags.h"
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#include "caffe2/core/init.h"
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#include "caffe2/core/logging.h"
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#include "caffe2/utils/cpuid.h"
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C10_DEFINE_bool(
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caffe2_quit_on_unsupported_cpu_feature,
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false,
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"If set, when Caffe2 is built with a CPU feature (like avx2) but the "
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"current CPU does not support it, quit early. If not set (by default), "
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"log this as an error message and continue execution.");
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namespace caffe2 {
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inline void QuitIfFeatureUnsupported(
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const bool cpu_has_feature, const string& feature) {
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VLOG(1) << "Caffe2 built with " << feature << ".";
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if (!cpu_has_feature) {
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string err_string =
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"The Caffe2 binary is compiled with CPU feature " + feature +
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", but your CPU does not support it. This will lead to segfaults "
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"on your machine, such as SIGILL 'illegal instructions' on Linux. "
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"As a result Caffe2 will preemptively quit. Please install or "
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"build a Caffe2 binary with the feature turned off.";
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if (FLAGS_caffe2_quit_on_unsupported_cpu_feature) {
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LOG(FATAL) << err_string;
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} else {
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LOG(ERROR) << err_string;
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}
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}
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}
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static void WarnIfFeatureUnused(
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const bool cpu_has_feature, const string& feature) {
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VLOG(1) << "Caffe2 not built with " << feature << ".";
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if (cpu_has_feature) {
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#ifdef CAFFE2_NO_CROSS_ARCH_WARNING
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// When cross-compiling single binary for multiple archs - turns off the
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// annoying warning
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VLOG(1)
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#else
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LOG(ERROR)
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#endif
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<< "CPU feature " << feature
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<< " is present on your machine, "
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"but the Caffe2 binary is not compiled with it. It means you "
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"may not get the full speed of your CPU.";
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}
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}
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bool Caffe2CheckIntrinsicsFeatures(int*, char***) {
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#ifdef __AVX__
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QuitIfFeatureUnsupported(GetCpuId().avx(), "avx");
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#else
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WarnIfFeatureUnused(GetCpuId().avx(), "avx");
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#endif
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#ifdef __AVX2__
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QuitIfFeatureUnsupported(GetCpuId().avx2(), "avx2");
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#else
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WarnIfFeatureUnused(GetCpuId().avx2(), "avx2");
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#endif
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#ifdef __FMA__
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QuitIfFeatureUnsupported(GetCpuId().fma(), "fma");
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#else
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WarnIfFeatureUnused(GetCpuId().fma(), "fma");
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#endif
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return true;
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}
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REGISTER_CAFFE2_INIT_FUNCTION(
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Caffe2CheckIntrinsicsFeatures,
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&Caffe2CheckIntrinsicsFeatures,
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"Check intrinsics compatibility between the CPU feature and the binary.");
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} // namespace caffe2
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