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Revert "[ATen][CUDA][CUBLAS] cublasLtMatmul increase workspace_size (#120925)"

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This reverts commit 3239f86a3df133b5977d988324639e0de7af8749.

Reverted https://github.com/pytorch/pytorch/pull/120925 on behalf of https://github.com/malfet due to Breaks internal tests, likely due to the increased memory requirements ([comment](https://github.com/pytorch/pytorch/pull/120925#issuecomment-1983875400))
This commit is contained in:
PyTorch MergeBot
2024-03-07 16:16:07 +00:00
parent eea37c6db4
commit 862b99b571
1 changed files with 1 additions and 10 deletions
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11
aten/src/ATen/cuda/CUDABlas.cpp
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@ -183,22 +183,13 @@ uint32_t _getAlignment(uintptr_t address) {
static size_t _parseChosenWorkspaceSize() {
const char * val = getenv("CUBLASLT_WORKSPACE_SIZE");
size_t workspace_size = 1024;
#ifdef USE_ROCM
if (!val) {
// accept either env var
val = getenv("HIPBLASLT_WORKSPACE_SIZE");
}
#else
cudaDeviceProp* p = at::cuda::getDeviceProperties(c10::cuda::current_device());
// Keep workspace_size = 1024 for small Ampere GPUs
// See https://github.com/pytorch/pytorch/pull/120925#issuecomment-1977556485
if (p->major == 8 && p->totalGlobalMem / 1073741824 >= 24) {
workspace_size = 4096;
} else if (p->major >= 9) {
workspace_size = 32768;
}
#endif
size_t workspace_size = 1024; /* default size in KiB according to #73328 */
if (val) {
try {
workspace_size = std::stoi(val);