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testing: recognise Neuron for flash-attention platform support #66

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testing: recognise Neuron for flash-attention platform support #66

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12 changes: 12 additions & 0 deletions torch/testing/_internal/common_cuda.py
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,16 @@
import unittest


# Neuron runs the upstream attention/CP tests through the PrivateUse1
# dispatcher. The PLATFORM_SUPPORTS_* LazyVals below only recognise
# CUDA/ROCm/XPU, so without this they short-circuit to a CUDA-only skip --
# including inside the spawn-ed subprocesses of multiprocess DTensor tests,
# where a main-process-only override does not run. Gating on the inherited
# PYTORCH_TESTING_DEVICE_ONLY_FOR env var makes the flags correct in both the
# controller and the subprocesses.
TEST_NEURON = os.environ.get("PYTORCH_TESTING_DEVICE_ONLY_FOR") == "neuron"


CUDA_ALREADY_INITIALIZED_ON_IMPORT = torch.cuda.is_initialized()


Expand Down Expand Up @@ -70,6 +80,8 @@ def CDNA2OrLater():
return evaluate_gfx_arch_within(["gfx90a", "gfx942"])

def evaluate_platform_supports_flash_attention():
if TEST_NEURON:
return True
if TEST_WITH_ROCM:
arch_list = ["gfx90a", "gfx942", "gfx1100", "gfx1201", "gfx950"]
if os.environ.get("TORCH_ROCM_AOTRITON_ENABLE_EXPERIMENTAL", "0") != "0":
Expand Down