62 lines
2.3 KiB
Plaintext
62 lines
2.3 KiB
Plaintext
/*
|
|
* SPDX-FileCopyrightText: Copyright (c) 2023-2024 NVIDIA CORPORATION & AFFILIATES. All rights
|
|
* reserved. SPDX-License-Identifier: NVIDIA TensorRT Source Code License Agreement
|
|
*
|
|
* NVIDIA CORPORATION, its affiliates and licensors retain all intellectual
|
|
* property and proprietary rights in and to this material, related
|
|
* documentation and any modifications thereto. Any use, reproduction,
|
|
* disclosure or distribution of this material and related documentation
|
|
* without an express license agreement from NVIDIA CORPORATION or
|
|
* its affiliates is strictly prohibited.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "cuda_hint.cuh"
|
|
#ifndef __CUDACC__
|
|
#include <cuda_runtime.h>
|
|
#endif
|
|
#include "barriers.cuh"
|
|
|
|
namespace ldgsts {
|
|
// @fixme: prefetch makes it slower on sm_86. Try on other platforms.
|
|
template <uint32_t size>
|
|
__device__ inline void copyAsync(void* dst, void const* src,
|
|
uint32_t srcSize = size) // srcSize == 0 means filling with zeros.
|
|
{
|
|
static_assert(size == 4 || size == 8 || size == 16);
|
|
if constexpr (size == 16) {
|
|
// asm volatile("cp.async.ca.shared.global.L2::128B [%0], [%1], 16, %2;\n" ::
|
|
// "l"(__cvta_generic_to_shared(dst)), "l"(src), "r"(srcSize));
|
|
asm volatile(
|
|
"cp.async.cg.shared.global [%0], [%1], 16, %2;\n" ::"l"(__cvta_generic_to_shared(dst)),
|
|
"l"(src), "r"(srcSize));
|
|
} else {
|
|
asm volatile(
|
|
"cp.async.ca.shared.global [%0], [%1], %2, %3;\n" ::"l"(__cvta_generic_to_shared(dst)),
|
|
"l"(src), "n"(size), "r"(srcSize));
|
|
}
|
|
}
|
|
|
|
__device__ inline void commitGroup() { asm volatile("cp.async.commit_group;\n"); }
|
|
|
|
// wait until only targetNbInFlightGroups groups are still in-flight.
|
|
template <uint32_t targetNbInFlightGroups>
|
|
__device__ inline void waitGroup() {
|
|
asm volatile("cp.async.wait_group %0;\n" ::"n"(targetNbInFlightGroups));
|
|
}
|
|
|
|
// noInc = false: increase expected arrive count, in additional to increasing arrive count
|
|
// noInc = true: increases arrive count but does not modify expected arrive count
|
|
__device__ inline void barArrive(CtaBarrier& bar, bool noInc = false) {
|
|
if (noInc) {
|
|
asm volatile(
|
|
"cp.async.mbarrier.arrive.noinc.shared.b64 [%0];\n" ::"l"(__cvta_generic_to_shared(&bar)));
|
|
} else {
|
|
asm volatile(
|
|
"cp.async.mbarrier.arrive.shared.b64 [%0];\n" ::"l"(__cvta_generic_to_shared(&bar)));
|
|
}
|
|
}
|
|
|
|
} // namespace ldgsts
|