86 lines
3.5 KiB
Markdown
86 lines
3.5 KiB
Markdown
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# Introduction
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CUTLASS is a collection of CUDA C++ template abstractions for implementing
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high-performance matrix-multiplication (GEMM) at all levels and scales within CUDA.
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It incorporates the same strategies for data movement and hierarchical decomposition
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that are used to implement cuBLAS. CUTLASS decomposes these “moving parts” into
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reusable, modular software components abstracted by C++ template classes. These
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thread-wide, warp-wide, block-wide, and device-wide primitives can be specialized
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and tuned via custom tiling sizes, data types, and other algorithmic policy.
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The resulting flexibility simplifies their use as building blocks within custom
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kernels and applications.
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To support a wide variety of applications, CUTLASS provides extensive support for
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mixed-precision computations, providing specialized data-movement and
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multiply-accumulate abstractions for 8-bit integer, half-precision floating
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point (FP16), single-precision floating point (FP32), and double-precision floating
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point (FP64) types.
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# Project Structure
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CUTLASS is arranged as a header-only library with several example test programs
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that demonstrate instantiating a GEMM task within a CUDA kernel. Comments inline
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with the source explain the individual components.
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The repository is organized in the following arrangement.
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cutlass/ Root of header-only source library for matrix multiply
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gemm/ Implementation of GEMM __device__ code and supporting components
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util/ Utility components for CUDA device-side CUDA development
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A test program is provided to illustrate the use of CUTLASS. This is implemented
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in the following directory.
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cutlass_test Root of test programs depicting CUTLASS kernels
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util/ Utilities
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gemm.cu Simple example calling CUTLASS and CUBLAS GEMM kernels
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Makefile Build script for test programs
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# Makefile usage
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There are different sample targets for different GEMM data types and
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transposititions. Be sure to specify your target architecture.
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make <sgemm|dgemm|hgemm|igemm|wgemm> sm=<60|61|70> \
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[transpose=<nn|nt|tn|tt>] [verbose=<0|1>] [keep=<0|1>]
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# Program usage
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Program usage:
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<s|d|h|i|w>gemm_<nn|nt|tn|tt>
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[--help]
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[--schmoo || --m=<height> --n=<width> --k=<depth>]
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[--i=<timing iterations>]
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[--device=<device-id>]
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[--alpha=<alpha> --beta=<beta>]
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# About
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CUTLASS is released by NVIDIA Corporation as Open Source software under the
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BSD license.
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# Copyright
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Copyright (c) 2011-2017, NVIDIA CORPORATION. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are not permitted.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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