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Update __init__.py

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This commit is contained in:
Daniel Han 2025-09-08 02:02:11 -07:00
commit bcd609b1ac
1 changed files with 14 additions and 2 deletions
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16
unsloth/__init__.py
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@ -91,11 +91,23 @@ DEVICE_COUNT : int = get_device_count()
# Reduce VRAM usage by reducing fragmentation
# And optimize pinning of memory
if DEVICE_TYPE == "cuda" and os.environ.get("UNSLOTH_VLLM_STANDBY", "0")=="0":
if (DEVICE_TYPE == "cuda") and (os.environ.get("UNSLOTH_VLLM_STANDBY", "0")=="0"):
os.environ["PYTORCH_CUDA_ALLOC_CONF"] = \
"expandable_segments:True,"\
"roundup_power2_divisions:[32:256,64:128,256:64,>:32]"
elif (DEVICE_TYPE == "cuda") and (os.environ.get("UNSLOTH_VLLM_STANDBY", "0")=="1") and \
("expandable_segments:True" in os.environ.get("PYTORCH_CUDA_ALLOC_CONF", "")):
warnings.warn(
"Unsloth: `UNSLOTH_VLLM_STANDBY` is on, but `expandable_segments` is on.\n"\
"We will remove `expandable_segments`."
stacklevel = 2,
)
os.environ["PYTORCH_CUDA_ALLOC_CONF"] = re.sub(
r"expandable\_segments\:True\,?",
"",
os.environ["PYTORCH_CUDA_ALLOC_CONF"],
)
pass
# We support Pytorch 2
# Fixes https://github.com/unslothai/unsloth/issues/38
torch_version = str(re.match(r"[0-9\.]{3,}", str(torch.__version__)).group(0)).split(".")