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Add environment variable to opt out of #10302 (forced disablement of cudnn for all AMD users)

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Christopher Anderson 2025-10-24 18:40:17 +11:00
parent 388b306a2b
commit 00184d155b
1 changed files with 7 additions and 5 deletions
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12
comfy/model_management.py
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@ -334,11 +334,13 @@ SUPPORT_FP8_OPS = args.supports_fp8_compute
AMD_RDNA2_AND_OLDER_ARCH = ["gfx1030", "gfx1031", "gfx1010", "gfx1011", "gfx1012", "gfx906", "gfx900", "gfx803"] AMD_RDNA2_AND_OLDER_ARCH = ["gfx1030", "gfx1031", "gfx1010", "gfx1011", "gfx1012", "gfx906", "gfx900", "gfx803"]
try: try:
if is_amd(): arch = torch.cuda.get_device_properties(get_torch_device()).gcnArchName
arch = torch.cuda.get_device_properties(get_torch_device()).gcnArchName if not (any((a in arch) for a in AMD_RDNA2_AND_OLDER_ARCH)):
if not (any((a in arch) for a in AMD_RDNA2_AND_OLDER_ARCH)): torch.backends.cudnn.enabled = os.environ.get("TORCH_BACKENDS_CUDNN_ENABLED", "0").strip().lower() not in {
torch.backends.cudnn.enabled = False # Seems to improve things a lot on AMD "0", "off", "false", "disable", "disabled", "no"}
logging.info("Set: torch.backends.cudnn.enabled = False for better AMD performance.") if not torch.backends.cudnn.enabled:
logging.info(
"ComfyUI has set torch.backends.cudnn.enabled to False for better AMD performance. Set environment var TORCH_BACKENDS_CUDDNN_ENABLED=1 to enable it again.")
try: try:
rocm_version = tuple(map(int, str(torch.version.hip).split(".")[:2])) rocm_version = tuple(map(int, str(torch.version.hip).split(".")[:2]))