Add support for bmm and to for fbgemm Tensor#2337
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drisspg
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Jun 8, 2025
drisspg
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Jun 8, 2025
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| # not used | ||
| num_tokens = torch.empty([input_tensor.size(0)], device=input_tensor.device) | ||
| xq, x_scale = torch.ops.fbgemm.quantize_fp8_per_row( |
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This ot use num_tokens feels weird, maybe make an issue on fbgemm? or update the op to not need
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yeah I checked with @jiawenliu64 and this arg is indeed only used in internal use cases, he was recommending to use the triton op, although I found the triton op is a bit slower, maybe it requires some tuning. I'll double check
drisspg
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Jun 8, 2025
drisspg
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Summary: att, this PR adds support for running quantized bmm, the quantized bmm kernel for int4 and fp8 (with dynamic activation quantization) requires transpose of weights in order to run, so added transpose_input to the convert function to transpose the weights first Test Plan: python test/dtypes/test_fbgemm_fp8.py -k test_bmm python test/dtypes/test_fbgemm_int4.py -k test_bmm Reviewers: Subscribers: Tasks: Tags:
drisspg
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Add support for bmm for fbgemm config Summary: att, this PR adds support for running quantized bmm, the quantized bmm kernel for int4 and fp8 (with dynamic activation quantization) requires transpose of weights in order to run, so added transpose_input to the convert function to transpose the weights first Test Plan: python test/dtypes/test_fbgemm_fp8.py -k test_bmm python test/dtypes/test_fbgemm_int4.py -k test_bmm Reviewers: Subscribers: Tasks: Tags:
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Summary:
att, this PR adds support for running quantized bmm, the quantized bmm kernel for int4 and fp8 (with dynamic activation quantization) requires transpose of weights in order to run, so added transpose_input to the convert function to transpose the weights first
Test Plan:
python test/dtypes/test_fbgemm_fp8.py -k test_bmm
python test/dtypes/test_fbgemm_int4.py -k test_bmm
Reviewers:
Subscribers:
Tasks:
Tags: