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Merge pull request #272 from sfinktah/sfink-cudnn-env

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Added env var TORCH_BACKENDS_CUDNN_ENABLED, defaults to 1.
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patientx 2025-08-25 11:56:37 +03:00 committed by GitHub
commit cbeac36b57
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1 changed files with 8 additions and 2 deletions
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comfy/customzluda/zluda.py
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@ -430,6 +430,14 @@ try:
import triton import triton
import triton.language as tl import triton.language as tl
print(" :: Triton core imported successfully") print(" :: Triton core imported successfully")
# This needs to be up here, so it can disable cudnn before anything can even think about using it
torch.backends.cudnn.enabled = os.environ.get("TORCH_BACKENDS_CUDNN_ENABLED", "1").strip().lower() not in {"0", "off", "false", "disable", "disabled", "no"}
if torch.backends.cudnn.enabled:
print(" :: Enabled cuDNN")
else:
print(" :: Disabled cuDNN")
torch.backends.cudnn.benchmark = False
@triton.jit @triton.jit
def _zluda_kernel_test(x_ptr, y_ptr, n_elements, BLOCK_SIZE: tl.constexpr): def _zluda_kernel_test(x_ptr, y_ptr, n_elements, BLOCK_SIZE: tl.constexpr):
@ -676,8 +684,6 @@ def do_hijack():
print(" :: Configuring PyTorch backends...") print(" :: Configuring PyTorch backends...")
torch.backends.cuda.enable_mem_efficient_sdp(False) torch.backends.cuda.enable_mem_efficient_sdp(False)
torch.backends.cuda.enable_mem_efficient_sdp = do_nothing torch.backends.cuda.enable_mem_efficient_sdp = do_nothing
torch.backends.cudnn.enabled = False
torch.backends.cudnn.benchmark = False
if hasattr(torch.backends.cuda, "enable_flash_sdp"): if hasattr(torch.backends.cuda, "enable_flash_sdp"):
torch.backends.cuda.enable_flash_sdp(True) torch.backends.cuda.enable_flash_sdp(True)
print(" :: Disabled CUDA flash attention") print(" :: Disabled CUDA flash attention")