f74fea9ce3
Add dense_gemm_fp8_2xacc.py — a CuTeDSL port of CUTLASS Example 54 (54_hopper_fp8_warp_specialized_gemm.cu) for NVIDIA Hopper (SM90). Implements D = scale_a * scale_b * (A @ B) where A/B are FP8 E4M3FN using the 2xAcc (double accumulation) technique: a temporary accumulator is periodically promoted into the main accumulator every mma_promotion_interval MMA instructions to prevent FP8 precision loss. Features: - FP8 E4M3FN inputs with Float32 accumulation - 2xAcc for improved numerical accuracy - TMA with multicast for A/B/D transfers - WGMMA warp-specialized persistent tile scheduling - Configurable output dtype: Float16, Float32, Float8E4M3FN - Scalar scale_a / scale_b epilogue factors - Cluster shapes up to 2x2 Add pytest test suite covering: - L0 compile tests: all tile shapes, cluster shapes, output dtypes, mma_promotion_interval values - L1 correctness tests: numerical validation vs torch.einsum reference for all configs, non-trivial scale factors, and batched GEMM (L>1) - Benchmark tests (pytest -m bench -s): representative problem sizes with warmup, cold-L2, and TFLOPS reporting Also fix conftest.py to import cutlass before adding examples/python/CuTeDSL to sys.path, preventing the jax/ examples subdirectory from being detected as a namespace package and breaking cutlass's JAX availability check.
35 lines
1.8 KiB
Python
35 lines
1.8 KiB
Python
# Copyright (c) 2025 - 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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# SPDX-License-Identifier: BSD-3-Clause
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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# 1. Redistributions of source code must retain the above copyright notice, this
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# list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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# 3. Neither the name of the copyright holder nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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def pytest_configure(config):
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config.default_SMs[__file__] = "90a"
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config.addinivalue_line(
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"markers",
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"bench: mark test as a performance benchmark (skipped by default; run with -m bench).",
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)
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