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add wait_tensor() after all_gather in float8 to fix mem leak #262

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add wait_tensor() after all_gather in float8 to fix mem leak #262

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1 change: 1 addition & 0 deletions float8_experimental/float8_ops.py
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Original file line number Diff line number Diff line change
Expand Up @@ -238,6 +238,7 @@ def allgather_fp8(aten_op, args, kwargs=None):
fp8_data = fp8_data.view(torch.uint8)
fp8_data = fp8_data.contiguous()
fp8_out = aten_op(fp8_data, *args[1:], **kwargs)
fp8_out = torch.ops._c10d_functional.wait_tensor(fp8_out)
fp8_out = fp8_out.view(fp8_input._data.dtype)
return Float8Tensor(
fp8_out, fp8_input._scale, fp8_input._orig_dtype, fp8_input._mm_config
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