RCCL 2.4 update
이 커밋은 다음에 포함됨:
Wenkai Du
@@ -0,0 +1,313 @@
|
||||
/*
|
||||
Copyright (c) 2019 - present Advanced Micro Devices, Inc. All rights reserved.
|
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
of this software and associated documentation files (the "Software"), to deal
|
||||
in the Software without restriction, including without limitation the rights
|
||||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
copies of the Software, and to permit persons to whom the Software is
|
||||
furnished to do so, subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included in
|
||||
all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
THE SOFTWARE.
|
||||
*/
|
||||
|
||||
// This program measures simultaneous copy performance across multiple GPUs
|
||||
// on the same node
|
||||
|
||||
#include <chrono>
|
||||
#include <cstdio>
|
||||
#include <cstdlib>
|
||||
#include <set>
|
||||
|
||||
#include <hip/hip_runtime.h>
|
||||
#include "copy_kernel.h"
|
||||
#include "TransferBench.hpp"
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
// Display usage
|
||||
if (argc <= 1)
|
||||
{
|
||||
printf("Usage: %s configFile <N>\n", argv[0]);
|
||||
printf("- configFile: file describing topologies to test\n");
|
||||
printf(" Each line should contain a single topology\n");
|
||||
printf(" L - number of links followed by L white-space separated triples (src, dst, # blocks)\n");
|
||||
printf(" For example:\n");
|
||||
printf(" 2 0 1 3 1 0 3\n");
|
||||
printf(" would define 2 links each using 3 threadblocks from GPU0 -> GPU1, and GPU1->GPU0\n");
|
||||
printf("- N: (Optional) Number of bytes to transfer per link.\n");
|
||||
printf(" If not specified, defaults to 2^28=256MB. Must be a multiple of 128 bytes\n");
|
||||
printf("Set env var USE_MEMCPY_ASYNC to use hipMemcpyAsync instead of copy kernel\n");
|
||||
exit(0);
|
||||
}
|
||||
|
||||
// Parse number of bytes to use (or use default if not specified)
|
||||
size_t const numBytesPerLink = argc > 2 ? atoll(argv[2]) : (1<<28);
|
||||
size_t N = numBytesPerLink / sizeof(float);
|
||||
if (numBytesPerLink % 128)
|
||||
{
|
||||
printf("[ERROR] numBytesPerLink (%lu) must be a multiple of 128\n", numBytesPerLink);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
// Currently an environment variable is required in order to enable fine-grained VRAM allocations
|
||||
if (!getenv("HSA_FORCE_FINE_GRAIN_PCIE"))
|
||||
{
|
||||
printf("[ERROR] Currently you must set HSA_FORCE_FINE_GRAIN_PCIE=1 prior to execution\n");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
bool useMemcpy = getenv("USE_MEMCPY_ASYNC");
|
||||
printf("Using %s\n", useMemcpy ? "hipMemcpyAsync (USE_MEMCPY_ASYNC found) [# of blocks to use will be ignored]" : "copy kernel (USE_MEMCPY_ASYNC not found)");
|
||||
|
||||
// Collect the number of available GPUs on this machine
|
||||
int numDevices;
|
||||
HIP_CALL(hipGetDeviceCount(&numDevices));
|
||||
if (numDevices < 1)
|
||||
{
|
||||
printf("[ERROR] No GPU devices found\n");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
// Print header
|
||||
printf("%-*s(GB/s)", MAX_NAME_LEN - 6, "Configuration");
|
||||
for (int i = 0; i < numDevices; i++)
|
||||
printf(" GPU %02d", i);
|
||||
printf(" Total\n");
|
||||
for (int i = 0; i < MAX_NAME_LEN + 8 * (numDevices + 1); i++) printf("=");
|
||||
printf("\n");
|
||||
|
||||
// Read configuration file
|
||||
FILE* fp = fopen(argv[1], "r");
|
||||
if (!fp)
|
||||
{
|
||||
printf("[ERROR] Unable to open link configuration file: [%s]\n", argv[1]);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
// Track links that get used
|
||||
std::map<std::pair<int, int>, int> linkMap;
|
||||
|
||||
char line[2048];
|
||||
while(fgets(line, 2048, fp))
|
||||
{
|
||||
// Parse links from configuration file
|
||||
std::vector<Link> links;
|
||||
ParseLinks(line, links);
|
||||
|
||||
int const numLinks = links.size();
|
||||
if (numLinks == 0) continue;
|
||||
|
||||
// Clear counters
|
||||
int linkCount[numDevices];
|
||||
for (int i = 0; i < numDevices; i++)
|
||||
linkCount[i] = 0;
|
||||
|
||||
float* linkSrcMem[numLinks];
|
||||
float* linkDstMem[numLinks];
|
||||
hipStream_t streams[numLinks];
|
||||
hipEvent_t startEvents[numLinks];
|
||||
hipEvent_t stopEvents[numLinks];
|
||||
std::vector<BlockParam> cpuBlockParams[numLinks];
|
||||
BlockParam* gpuBlockParams[numLinks];
|
||||
|
||||
char name[MAX_NAME_LEN+1] = {};
|
||||
|
||||
for (int i = 0; i < numLinks; i++)
|
||||
{
|
||||
int const src = links[i].srcGpu;
|
||||
int const dst = links[i].dstGpu;
|
||||
if (src < 0 || src >= numDevices ||
|
||||
dst < 0 || dst >= numDevices)
|
||||
{
|
||||
printf("[ERROR] Invalid link (%d to %d). Total devices: %d\n", src, dst, numDevices);
|
||||
exit(1);
|
||||
}
|
||||
snprintf(name + strlen(name), MAX_NAME_LEN, "%d->%d:%d ", src, dst, links[i].numBlocksToUse);
|
||||
|
||||
// Enable peer-to-peer access if this is the first time seeing this pair
|
||||
auto linkPair = std::make_pair(src, dst);
|
||||
linkMap[linkPair]++;
|
||||
if (linkMap[linkPair] == 1)
|
||||
{
|
||||
int canAccess;
|
||||
HIP_CALL(hipDeviceCanAccessPeer(&canAccess, src, dst));
|
||||
if (!canAccess)
|
||||
{
|
||||
printf("[ERROR] Unable to enable peer access between device %d and %d\n", src, dst);
|
||||
exit(1);
|
||||
}
|
||||
HIP_CALL(hipSetDevice(src));
|
||||
HIP_CALL(hipDeviceEnablePeerAccess(dst, 0));
|
||||
}
|
||||
|
||||
// Count # of links / total blocks each GPU will be working on
|
||||
linkCount[src]++;
|
||||
|
||||
// Allocate GPU memory on source GPU / streams / events
|
||||
HIP_CALL(hipSetDevice(links[i].srcGpu));
|
||||
HIP_CALL(hipStreamCreate(&streams[i]));
|
||||
HIP_CALL(hipEventCreate(&startEvents[i]));
|
||||
HIP_CALL(hipEventCreate(&stopEvents[i]));
|
||||
HIP_CALL(hipMalloc((void **)&linkSrcMem[i], numBytesPerLink));
|
||||
HIP_CALL(hipMalloc((void**)&gpuBlockParams[i], sizeof(BlockParam) * numLinks));
|
||||
CheckOrFill(N, linkSrcMem[i], false);
|
||||
|
||||
// Allocate fine-grained GPU memory on destination GPU
|
||||
HIP_CALL(hipSetDevice(links[i].dstGpu));
|
||||
HIP_CALL(hipExtMallocWithFlags((void**)&linkDstMem[i], numBytesPerLink, hipDeviceMallocFinegrained));
|
||||
|
||||
// Each block needs to know src/dst pointers and how many elements to transfer
|
||||
// Figure out the sub-array each block does for this link
|
||||
// NOTE: Have each sub-array to work on multiple of 32-floats (128-bytes),
|
||||
// but divide as evenly as possible
|
||||
// NOTE: N is always a multiple of 32
|
||||
int blocksWithExtra = (N / 32) % links[i].numBlocksToUse;
|
||||
int perBlockBaseN = (N / 32) / links[i].numBlocksToUse * 32;
|
||||
for (int j = 0; j < links[i].numBlocksToUse; j++)
|
||||
{
|
||||
BlockParam param;
|
||||
param.N = perBlockBaseN + ((j < blocksWithExtra) ? 32 : 0);
|
||||
param.src = linkSrcMem[i] + ((j * perBlockBaseN) + ((j < blocksWithExtra) ?
|
||||
j : blocksWithExtra) * 32);
|
||||
param.dst = linkDstMem[i] + ((j * perBlockBaseN) + ((j < blocksWithExtra) ?
|
||||
j : blocksWithExtra) * 32);
|
||||
cpuBlockParams[i].push_back(param);
|
||||
}
|
||||
|
||||
HIP_CALL(hipMemcpy(gpuBlockParams[i], cpuBlockParams[i].data(),
|
||||
sizeof(BlockParam) * links[i].numBlocksToUse, hipMemcpyHostToDevice));
|
||||
}
|
||||
|
||||
// Launch kernels (warmup iterations are not counted)
|
||||
int numWarmups = 3;
|
||||
int numIterations = 10;
|
||||
double totalCpuTime = 0;
|
||||
double totalGpuTime[numDevices];
|
||||
for (int i = 0; i < numDevices; i++) totalGpuTime[i] = 0.0;
|
||||
|
||||
for (int iteration = -numWarmups; iteration < numIterations; iteration++)
|
||||
{
|
||||
auto cpuStart = std::chrono::high_resolution_clock::now();
|
||||
#pragma omp parallel for num_threads(numLinks)
|
||||
for (int i = 0; i < numLinks; i++)
|
||||
{
|
||||
HIP_CALL(hipSetDevice(links[i].srcGpu));
|
||||
HIP_CALL(hipEventRecord(startEvents[i], streams[i]));
|
||||
if (useMemcpy)
|
||||
{
|
||||
HIP_CALL(hipMemcpyAsync(linkDstMem[i], linkSrcMem[i],
|
||||
numBytesPerLink, hipMemcpyDeviceToDevice,
|
||||
streams[i]));
|
||||
}
|
||||
else
|
||||
{
|
||||
hipLaunchKernelGGL(CopyKernel,
|
||||
dim3(links[i].numBlocksToUse, 1, 1),
|
||||
dim3(BLOCKSIZE, 1, 1),
|
||||
0,
|
||||
streams[i],
|
||||
gpuBlockParams[i]);
|
||||
}
|
||||
HIP_CALL(hipEventRecord(stopEvents[i], streams[i]));
|
||||
}
|
||||
|
||||
for (int i = 0; i < numLinks; i++)
|
||||
hipStreamSynchronize(streams[i]);
|
||||
|
||||
auto cpuDelta = std::chrono::high_resolution_clock::now() - cpuStart;
|
||||
double deltaSec = std::chrono::duration_cast<std::chrono::duration<double>>(cpuDelta).count();
|
||||
|
||||
if (iteration >= 0)
|
||||
{
|
||||
totalCpuTime += deltaSec;
|
||||
|
||||
for (int i = 0; i < numDevices; i++)
|
||||
{
|
||||
// Multiple links running on the same device may be running simultaneously
|
||||
// so try to figure out the first/last event across all links
|
||||
float maxTime = 0.0f;
|
||||
for (int j = 0; j < numLinks; j++)
|
||||
{
|
||||
if (links[j].srcGpu != i) continue;
|
||||
for (int k = 0; k < numLinks; k++)
|
||||
{
|
||||
if (links[k].srcGpu != i) continue;
|
||||
|
||||
float gpuDeltaMsec;
|
||||
HIP_CALL(hipEventElapsedTime(&gpuDeltaMsec, startEvents[j], stopEvents[k]));
|
||||
maxTime = std::max(maxTime, gpuDeltaMsec);
|
||||
}
|
||||
}
|
||||
totalGpuTime[i] += maxTime / 1000.0;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Validate that each link has transferred correctly
|
||||
for (int i = 0; i < numLinks; i++)
|
||||
CheckOrFill(N, linkDstMem[i], true);
|
||||
|
||||
// Report timings
|
||||
printf("%-*s", MAX_NAME_LEN, name);
|
||||
for (int i = 0; i < numDevices; i++)
|
||||
{
|
||||
if (linkCount[i] == 0)
|
||||
{
|
||||
printf("%8.3f", 0.0);
|
||||
}
|
||||
else
|
||||
{
|
||||
totalGpuTime[i] /= (1.0 * numIterations);
|
||||
printf("%8.3f", (linkCount[i] * numBytesPerLink / 1.0E9) / totalGpuTime[i]);
|
||||
}
|
||||
}
|
||||
|
||||
// Print off bandwidth (based on CPU wall-time timer)
|
||||
totalCpuTime /= numIterations;
|
||||
printf("%8.3f\n", (numLinks * numBytesPerLink / 1.0E9) / totalCpuTime);
|
||||
|
||||
// Release GPU memory
|
||||
for (int i = 0; i < numLinks; i++)
|
||||
{
|
||||
HIP_CALL(hipFree(linkSrcMem[i]));
|
||||
HIP_CALL(hipFree(linkDstMem[i]));
|
||||
HIP_CALL(hipFree(gpuBlockParams[i]));
|
||||
HIP_CALL(hipStreamDestroy(streams[i]));
|
||||
HIP_CALL(hipEventDestroy(startEvents[i]));
|
||||
HIP_CALL(hipEventDestroy(stopEvents[i]));
|
||||
|
||||
}
|
||||
}
|
||||
fclose(fp);
|
||||
|
||||
// Print link information
|
||||
for (int i = 0; i < MAX_NAME_LEN + 8 * (numDevices + 1); i++) printf("=");
|
||||
printf("\n");
|
||||
printf("Link topology:\n");
|
||||
uint32_t linkType;
|
||||
uint32_t hopCount;
|
||||
for (auto mapPair : linkMap)
|
||||
{
|
||||
int src = mapPair.first.first;
|
||||
int dst = mapPair.first.second;
|
||||
HIP_CALL(hipExtGetLinkTypeAndHopCount(src, dst, &linkType, &hopCount));
|
||||
printf("%d -> %d: %s [%d hop(s)]\n", src, dst,
|
||||
linkType == HSA_AMD_LINK_INFO_TYPE_HYPERTRANSPORT ? "HYPERTRANSPORT" :
|
||||
linkType == HSA_AMD_LINK_INFO_TYPE_QPI ? "QPI" :
|
||||
linkType == HSA_AMD_LINK_INFO_TYPE_PCIE ? "PCIE" :
|
||||
linkType == HSA_AMD_LINK_INFO_TYPE_INFINBAND ? "INFINIBAND" :
|
||||
linkType == HSA_AMD_LINK_INFO_TYPE_XGMI ? "XGMI" : "UNKNOWN",
|
||||
hopCount);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
새 이슈에서 참조
사용자 차단