cc3c29a81a
* v3.6 * update changelog * update readme * fix typo * fixing typos * hopper gemm with weight prefetch --------- Co-authored-by: yuzhai <yuzhai@nvidia.com> Co-authored-by: Haicheng Wu <haichengw@nvidia.com>
85 lines
3.4 KiB
C++
85 lines
3.4 KiB
C++
/***************************************************************************************************
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* Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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* SPDX-License-Identifier: BSD-3-Clause
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*
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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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*
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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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*
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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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*
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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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*
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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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*
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**************************************************************************************************/
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/*! \file
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\brief Grid dependent control (GDC) helpers for programmatic dependent launches (PDL).
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*/
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#pragma once
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#include "cute/arch/cluster_sm90.hpp"
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#include "cutlass/arch/barrier.h"
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#include "cutlass/conv/dispatch_policy.hpp"
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#include "cutlass/gemm/dispatch_policy.hpp"
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#ifndef CUTLASS_GDC_ENABLED
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#if (defined(CUTLASS_ENABLE_GDC_FOR_SM90) && \
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__CUDACC_VER_MAJOR__ >= 12 && \
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defined(__CUDA_ARCH__) && __CUDA_ARCH__ >= 900 && defined(__CUDA_ARCH_FEAT_SM90_ALL))
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#define CUTLASS_GDC_ENABLED
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#endif
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#endif
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namespace cutlass {
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namespace arch {
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// Issuing the launch_dependents instruction hints a dependent kernel to launch earlier
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// launch_dependents doesn't impact the functionality but the performance:
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// Launching a dependent kernel too early can compete with current kernels,
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// while launching too late can lead to a long latency.
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CUTLASS_DEVICE
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void launch_dependent_grids() {
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#if (defined(CUTLASS_GDC_ENABLED))
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asm volatile("griddepcontrol.launch_dependents;");
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#endif
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}
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// Issuing the griddepcontrol.wait instruction enforces no global memory access
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// prior to this istruction. This ensures the correctness of global memory access
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// when launching a dependent kernel earlier.
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CUTLASS_DEVICE
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void wait_on_dependent_grids() {
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#if (defined(CUTLASS_GDC_ENABLED))
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asm volatile("griddepcontrol.wait;");
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#endif
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}
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// Enable kernel-level query regarding whether the GDC feature is turned on
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#if (defined(CUTLASS_GDC_ENABLED))
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static constexpr bool IsGdcGloballyEnabled = true;
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#else
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static constexpr bool IsGdcGloballyEnabled = false;
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#endif
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} // namespace arch
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} // namespace cutlass
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