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[PyTorch] Use FP16 tols for distributed tests with TF32 compute #1831

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Merged
timmoon10 merged 6 commits into from
Jun 19, 2025
Merged

[PyTorch] Use FP16 tols for distributed tests with TF32 compute #1831

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c84dd92
Use FP16 tols for tests with TF32
timmoon10 May 28, 2025
3cdc49c
Merge branch 'main' into debug-distributed-tests
timmoon10 May 31, 2025
99d4cbf
Use uniform init instead of constant init
timmoon10 Jun 4, 2025
fdbabb9
Merge branch 'main' into debug-distributed-tests
timmoon10 Jun 4, 2025
ed3bb12
Revert constant init test, but reduce value
timmoon10 Jun 4, 2025
5a60f5a
Merge branch 'main' into debug-distributed-tests
timmoon10 Jun 6, 2025
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10 changes: 3 additions & 7 deletions tests/pytorch/distributed/run_numerics.py
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Original file line number Diff line number Diff line change
Expand Up @@ -47,11 +47,6 @@
)


# Disable TF32
torch.backends.cuda.matmul.allow_tf32 = False
torch.backends.cudnn.allow_tf32 = False


# Quantization recipe setup
def quantization_recipe() -> Recipe:
if QUANTIZATION == "fp8":
Expand Down Expand Up @@ -166,7 +161,7 @@ def backward(ctx, grad_output):


def _constant(tensor):
return nn.init.constant_(tensor, 0.5)
return nn.init.constant_(tensor, 0.05)


def dist_print(msg, src=None, end="\n", error=False):
Expand All @@ -189,7 +184,8 @@ def _get_tolerances(dtype):
if dtype == torch.bfloat16:
return {"rtol": 1.6e-2, "atol": 1e-5}
if dtype == torch.float32:
return {"rtol": 1.2e-4, "atol": 1e-4}
# TF32 has same mantissa bits as FP16
return {"rtol": 1e-3, "atol": 1e-5}
raise ValueError(f"Unsupported dtype ({dtype})")


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2 changes: 1 addition & 1 deletion tests/pytorch/distributed/test_numerics.py
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Expand Up @@ -56,7 +56,7 @@ def test_distributed(quantization):
if quantization == "fp8" and not fp8_available:
pytest.skip(reason_for_no_fp8)
if quantization == "fp8_cs" and not fp8_available:
pytest.skip(fp8_available)
pytest.skip(reason_for_no_fp8)
if quantization == "mxfp8" and not mxfp8_available:
pytest.skip(reason_for_no_mxfp8)
if quantization == "fp8_block_scaling" and not fp8_block_scaling_available:
Expand Down
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