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rocm-systems/tools/TransferBench/TransferBench.cpp
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/*
Copyright (c) 2019-2020 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 "TransferBench.hpp"
#include "GetClosestNumaNode.hpp"
#include <numa.h>
#include <numaif.h>
#include <stack>
#include <thread>
// Simple configuration parameters
size_t const DEFAULT_BYTES_PER_LINK = (1<<26); // Amount of data transferred per Link
int main(int argc, char **argv)
{
// Display usage
if (argc <= 1)
{
DisplayUsage(argv[0]);
DisplayTopology();
exit(0);
}
// If a negative value is listed for N, generate a comprehensive config file for this node
if (argc > 2 && atoll(argv[2]) < 0)
{
GenerateConfigFile(argv[1], -1*atoi(argv[2]));
exit(0);
}
// Check that Link configuration file can be opened
FILE* fp = fopen(argv[1], "r");
if (!fp)
{
printf("[ERROR] Unable to open link configuration file: [%s]\n", argv[1]);
exit(1);
}
// Check for NUMA library support
if (numa_available() == -1)
{
printf("[ERROR] NUMA library not supported. Check to see if libnuma has been installed on this system\n");
exit(1);
}
// Collect environment variables / display current run configuration
EnvVars ev;
ev.DisplayEnvVars();
// Determine number of bytes to run per Link
// If a non-zero number of bytes is specified, use it
// Otherwise generate array of bytes values to execute over
std::vector<size_t> valuesOfN;
size_t numBytesPerLink = argc > 2 ? atoll(argv[2]) : DEFAULT_BYTES_PER_LINK;
if (argc > 2)
{
// Adjust bytes if unit specified
char units = argv[2][strlen(argv[2])-1];
switch (units)
{
case 'K': case 'k': numBytesPerLink *= 1024; break;
case 'M': case 'm': numBytesPerLink *= 1024*1024; break;
case 'G': case 'g': numBytesPerLink *= 1024*1024*1024; break;
}
}
PopulateTestSizes(numBytesPerLink, ev.samplingFactor, valuesOfN);
// Find the largest N to be used - memory will only be allocated once per link config
size_t maxN = valuesOfN[0];
for (auto N : valuesOfN)
maxN = std::max(maxN, N);
int const initOffset = ev.byteOffset / sizeof(float);
std::stack<std::thread> threads;
// Collect the number of available CPUs/GPUs on this machine
int numGpuDevices;
HIP_CALL(hipGetDeviceCount(&numGpuDevices));
int const numCpuDevices = numa_num_configured_nodes();
// Track links that get used
std::set<std::pair<int, int>> peerAccessTracker;
// Print CSV header
if (ev.outputToCsv)
{
printf("Test,NumBytes,SrcMem,Executor,DstMem,CUs,BW(GB/s),Time(ms),LinkDesc,SrcAddr,DstAddr,ByteOffset,numWarmups,numIters,useHipCall,useMemSet,useSingleSync,combinedTiming\n");
}
// Loop over each line in the Link configuration file
int testNum = 0;
char line[2048];
while(fgets(line, 2048, fp))
{
// Parse links from configuration file
std::vector<Link> links;
ParseLinks(line, numCpuDevices, numGpuDevices, links);
int const numLinks = links.size();
if (numLinks == 0) continue;
testNum++;
// Prepare link
for (int i = 0; i < numLinks; i++)
{
// Get some aliases to link variables
MemType const& exeMemType = links[i].exeMemType;
int const& exeIndex = links[i].exeIndex;
MemType const& srcMemType = links[i].srcMemType;
MemType const& dstMemType = links[i].dstMemType;
int const& srcIndex = links[i].srcIndex;
int const& dstIndex = links[i].dstIndex;
int const& blocksToUse = links[i].numBlocksToUse;
// Enable peer-to-peer access if necessary (can only be called once per unique pair)
if (exeMemType == MEM_GPU)
{
// Ensure executing GPU can access source memory
if ((srcMemType == MEM_GPU || srcMemType == MEM_GPU_FINE) && srcIndex != exeIndex)
{
auto exeSrcPair = std::make_pair(exeIndex, srcIndex);
if (!peerAccessTracker.count(exeSrcPair))
{
EnablePeerAccess(exeIndex, srcIndex);
peerAccessTracker.insert(exeSrcPair);
}
}
// Ensure executing GPU can access destination memory
if ((dstMemType == MEM_GPU || dstMemType == MEM_GPU_FINE) && dstIndex != exeIndex)
{
auto exeDstPair = std::make_pair(exeIndex, dstIndex);
if (!peerAccessTracker.count(exeDstPair))
{
EnablePeerAccess(exeIndex, dstIndex);
peerAccessTracker.insert(exeDstPair);
}
}
}
// Allocate (maximum) source / destination memory based on type / device index
AllocateMemory(srcMemType, srcIndex, maxN * sizeof(float) + ev.byteOffset, &links[i].srcMem);
AllocateMemory(dstMemType, dstIndex, maxN * sizeof(float) + ev.byteOffset, &links[i].dstMem);
// Prepare execution agent
if (exeMemType == MEM_GPU)
{
HIP_CALL(hipSetDevice(exeIndex));
HIP_CALL(hipEventCreate(&links[i].startEvent));
HIP_CALL(hipEventCreate(&links[i].stopEvent));
HIP_CALL(hipMalloc((void**)&links[i].blockParam, sizeof(BlockParam) * blocksToUse));
HIP_CALL(hipStreamCreate(&links[i].stream));
}
else if (exeMemType == MEM_CPU)
{
links[i].blockParam = (BlockParam*)malloc(ev.numCpuPerLink * sizeof(BlockParam));
}
}
// Loop over all the different number of bytes to use per Link
for (auto N : valuesOfN)
{
if (!ev.outputToCsv) printf("Test %d: [%lu bytes]\n", testNum, N * sizeof(float));
// Prepare links based on current N
for (int i = 0; i < numLinks; i++)
{
// Initialize source memory with patterned data
CheckOrFill(MODE_FILL, N, ev.useMemset, ev.useHipCall, ev.fillPattern, links[i].srcMem + initOffset);
// 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
// - Partition N as evenly as posible, but try to keep blocks as multiples of 32,
// except the very last one, for alignment reasons
if (links[i].exeMemType == MEM_GPU)
{
size_t assigned = 0;
int maxNumBlocksToUse = std::min((N + 31) / 32, (size_t)links[i].numBlocksToUse);
for (int j = 0; j < links[i].numBlocksToUse; j++)
{
BlockParam param;
int blocksLeft = std::max(0, maxNumBlocksToUse - j);
size_t leftover = N - assigned;
size_t roundedN = (leftover + 31) / 32;
param.N = blocksLeft ? std::min(leftover, ((roundedN / blocksLeft) * 32)) : 0;
param.src = links[i].srcMem + assigned + initOffset;
param.dst = links[i].dstMem + assigned + initOffset;
assigned += param.N;
HIP_CALL(hipMemcpy(&links[i].blockParam[j], &param, sizeof(BlockParam), hipMemcpyHostToDevice));
}
}
else if (links[i].exeMemType == MEM_CPU)
{
// For CPU-based copy, divded based on the number of child threads
size_t assigned = 0;
int maxNumBlocksToUse = std::min((N + 31) / 32, (size_t)ev.numCpuPerLink);
for (int j = 0; j < ev.numCpuPerLink; j++)
{
int blocksLeft = std::max(0, maxNumBlocksToUse - j);
size_t leftover = N - assigned;
size_t roundedN = (leftover + 31) / 32;
links[i].blockParam[j].N = blocksLeft ? std::min(leftover, ((roundedN / blocksLeft) * 32)) : 0;
links[i].blockParam[j].src = links[i].srcMem + assigned + initOffset;
links[i].blockParam[j].dst = links[i].dstMem + assigned + initOffset;
assigned += links[i].blockParam[j].N;
}
}
// Initialize timing
links[i].totalTime = 0.0;
}
double totalCpuTime = 0;
// Launch kernels (warmup iterations are not counted)
for (int iteration = -ev.numWarmups; iteration < ev.numIterations; iteration++)
{
// Pause before starting first timed iteration in interactive mode
if (ev.useInteractive && iteration == 0)
{
printf("Hit <Enter> to continue: ");
scanf("%*c");
printf("\n");
}
// Start CPU timing for this iteration
auto cpuStart = std::chrono::high_resolution_clock::now();
// Execute all links in parallel
for (int i = 0; i < numLinks; i++)
threads.push(std::thread(RunLink, std::ref(ev), N, iteration, std::ref(links[i])));
// Wait for all threads to finish
for (int i = 0; i < numLinks; i++)
{
threads.top().join();
threads.pop();
}
// Stop CPU timing for this iteration
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;
}
// Pause for interactive mode
if (ev.useInteractive)
{
printf("Transfers complete. Hit <Enter> to continue: ");
scanf("%*c");
printf("\n");
}
// Validate that each link has transferred correctly
for (int i = 0; i < numLinks; i++)
CheckOrFill(MODE_CHECK, N, ev.useMemset, ev.useHipCall, ev.fillPattern, links[i].dstMem + initOffset);
// Report timings
totalCpuTime = totalCpuTime / (1.0 * ev.numIterations) * 1000;
double totalBandwidthGbs = (numLinks * N * sizeof(float) / 1.0E6) / totalCpuTime;
double maxGpuTime = 0;
for (int i = 0; i < numLinks; i++)
{
double linkDurationMsec = links[i].totalTime / (1.0 * ev.numIterations);
double linkBandwidthGbs = (N * sizeof(float) / 1.0E9) / linkDurationMsec * 1000.0f;
maxGpuTime = std::max(maxGpuTime, linkDurationMsec);
if (!ev.outputToCsv)
{
printf(" Link %02d: %c%02d -> [%cPU %02d:%02d] -> %c%02d | %9.3f GB/s | %8.3f ms | %-16s",
i + 1,
MemTypeStr[links[i].srcMemType], links[i].srcIndex,
MemTypeStr[links[i].exeMemType], links[i].exeIndex,
links[i].exeMemType == MEM_CPU ? ev.numCpuPerLink : links[i].numBlocksToUse,
MemTypeStr[links[i].dstMemType], links[i].dstIndex,
linkBandwidthGbs, linkDurationMsec,
GetLinkDesc(links[i]).c_str());
if (ev.showAddr) printf(" %16p | %16p |", links[i].srcMem + initOffset, links[i].dstMem + initOffset);
printf("\n");
}
else
{
printf("%d,%lu,%c%02d,%c%02d,%c%02d,%d,%9.3f,%8.3f,%s,%p,%p,%d,%d,%d,%s,%s,%s,%s\n",
testNum, N * sizeof(float),
MemTypeStr[links[i].srcMemType], links[i].srcIndex,
MemTypeStr[links[i].exeMemType], links[i].exeIndex,
MemTypeStr[links[i].dstMemType], links[i].dstIndex,
links[i].exeMemType == MEM_CPU ? ev.numCpuPerLink : links[i].numBlocksToUse,
linkBandwidthGbs, linkDurationMsec,
GetLinkDesc(links[i]).c_str(),
links[i].srcMem + initOffset, links[i].dstMem + initOffset,
ev.byteOffset,
ev.numWarmups, ev.numIterations,
ev.useHipCall ? "true" : "false",
ev.useMemset ? "true" : "false",
ev.useSingleSync ? "true" : "false",
ev.combineTiming ? "true" : "false");
}
}
// Display aggregate statistics
if (!ev.outputToCsv)
{
printf(" Aggregate Bandwidth (CPU timed) | %9.3f GB/s | %8.3f ms | Overhead: %.3f ms\n", totalBandwidthGbs, totalCpuTime,
totalCpuTime - maxGpuTime);
}
else
{
printf("%d,%lu,ALL,ALL,ALL,ALL,%9.3f,%8.3f,ALL,ALL,ALL,%d,%d,%d,%s,%s,%s,%s\n",
testNum, N * sizeof(float), totalBandwidthGbs, totalCpuTime, ev.byteOffset,
ev.numWarmups, ev.numIterations,
ev.useHipCall ? "true" : "false",
ev.useMemset ? "true" : "false",
ev.useSingleSync ? "true" : "false",
ev.combineTiming ? "true" : "false");
}
}
// Release GPU memory
for (int i = 0; i < numLinks; i++)
{
DeallocateMemory(links[i].srcMemType, links[i].srcIndex, links[i].srcMem);
DeallocateMemory(links[i].dstMemType, links[i].dstIndex, links[i].dstMem);
if (links[i].exeMemType == MEM_GPU)
{
HIP_CALL(hipEventDestroy(links[i].startEvent));
HIP_CALL(hipEventDestroy(links[i].stopEvent));
HIP_CALL(hipStreamDestroy(links[i].stream));
HIP_CALL(hipFree(links[i].blockParam));
}
else if (links[i].exeMemType == MEM_CPU)
{
free(links[i].blockParam);
}
}
}
fclose(fp);
return 0;
}
void DisplayUsage(char const* cmdName)
{
if (numa_available() == -1)
{
printf("[ERROR] NUMA library not supported. Check to see if libnuma has been installed on this system\n");
exit(1);
}
int numGpuDevices;
HIP_CALL(hipGetDeviceCount(&numGpuDevices));
int const numCpuDevices = numa_num_configured_nodes();
printf("Usage: %s configFile <N>\n", cmdName);
printf(" configFile: File containing Links to execute (see below for format)\n");
printf(" N : (Optional) Number of bytes to transfer per link.\n");
printf(" If not specified, defaults to %lu bytes. Must be a multiple of 4 bytes\n", DEFAULT_BYTES_PER_LINK);
printf(" If 0 is specified, a range of Ns will be benchmarked\n");
printf(" If a negative number is specified, a configFile gets generated with this number as default number of CUs per link\n");
printf(" May append a suffix ('K', 'M', 'G') for kilobytes / megabytes / gigabytes\n");
printf("\n");
printf("Configfile Format:\n");
printf("==================\n");
printf("A Link is defined as a uni-directional transfer from src memory location to dst memory location executed by either CPU or GPU\n");
printf("Each single line in the configuration file defines a set of Links to run in parallel\n");
printf("\n");
printf("There are two ways to specify the configuration file:\n");
printf("\n");
printf("1) Basic\n");
printf(" The basic specification assumes the same number of threadblocks/CUs used per GPU-executed Link\n");
printf(" A positive number of Links is specified followed by that number of triplets describing each Link\n");
printf("\n");
printf(" #Links #CUs (srcMem1->Executor1->dstMem1) ... (srcMemL->ExecutorL->dstMemL)\n");
printf("\n");
printf("2) Advanced\n");
printf(" The advanced specification allows different number of threadblocks/CUs used per GPU-executed Link\n");
printf(" A negative number of links is specified, followed by quadruples describing each Link\n");
printf(" -#Links (srcMem1->Executor1->dstMem1 #CUs1) ... (srcMemL->ExecutorL->dstMemL #CUsL)\n");
printf("\n");
printf("Argument Details:\n");
printf(" #Links : Number of Links to be run in parallel\n");
printf(" #CUs : Number of threadblocks/CUs to use for a GPU-executed Link\n");
printf(" srcMemL : Source memory location (Where the data is to be read from). Ignored in memset mode\n");
printf(" Executor: Executor are specified by a character indicating executor type, followed by device index (0-indexed)\n");
printf(" - C: CPU-executed (Indexed from 0 to %d)\n", numCpuDevices-1);
printf(" - G: GPU-executed (Indexed from 0 to %d)\n", numGpuDevices-1);
printf(" dstMemL : Destination memory location (Where the data is to be written to)\n");
printf("\n");
printf(" Memory locations are specified by a character indicating memory type, followed by device index (0-indexed)\n");
printf(" Supported memory locations are:\n");
printf(" - C: Pinned host memory (on NUMA node, indexed from 0 to %d)\n", numCpuDevices-1);
printf(" - G: Global device memory (on GPU device indexed from 0 to %d)\n", numGpuDevices-1);
printf(" - F: Fine-grain device memory (on GPU device indexed from 0 to %d)\n", numGpuDevices-1);
printf("\n");
printf("Examples:\n");
printf("1 4 (G0->G0->G1) Single Link that uses 4 CUs on GPU 0 that reads memory from GPU 0 and copies it to memory on GPU 1\n");
printf("1 4 (G1->C0->G0) Single Link that uses CPU 0 to read memory from GPU 1 and then copies it to memory on GPU 0\n");
printf("1 4 (C0->G2->G2) Single Link that uses 4 CUs on GPU 2 that reads memory from CPU 0 and copies it to memory on GPU 2\n");
printf("2 4 G0->G0->G1 G1->G1->G0 Runs 2 Links in parallel. GPU 0 - > GPU1, and GP1 -> GPU 0, each with 4 CUs\n");
printf("-2 (G0 G0 G1 4) (G1 G1 G0 2) Runs 2 Links in parallel. GPU 0 - > GPU 1 using four CUs, and GPU1 -> GPU 0 using two CUs\n");
printf("\n");
printf("Round brackets and arrows' ->' may be included for human clarity, but will be ignored and are unnecessary\n");
printf("\n");
EnvVars::DisplayUsage();
}
void GenerateConfigFile(char const* cfgFile, int numBlocks)
{
// Detect number of available GPUs and skip if less than 2
int numGpuDevices;
HIP_CALL(hipGetDeviceCount(&numGpuDevices));
printf("Generating configFile %s for %d device(s) / %d CUs per link\n", cfgFile, numGpuDevices, numBlocks);
if (numGpuDevices < 2)
{
printf("Skipping. (Less than 2 GPUs detected)\n");
exit(0);
}
// Check first to see if file exists, and issue warning
FILE* exists = fopen(cfgFile, "r");
if (exists)
{
fclose(exists);
printf("[WARN] File %s alreadys exists. Enter 'Y' to confirm overwrite\n", cfgFile);
char ch;
scanf(" %c", &ch);
if (ch != 'Y' && ch != 'y')
{
printf("Aborting\n");
exit(0);
}
}
// Open config file for writing
FILE* fp = fopen(cfgFile, "w");
if (!fp)
{
printf("Unable to open [%s] for writing\n", cfgFile);
exit(1);
}
// CU testing
fprintf(fp, "# CU scaling tests\n");
for (int i = 1; i < 16; i++)
fprintf(fp, "1 %d (G0->G0->G1)\n", i);
fprintf(fp, "\n");
// Pinned memory testing
fprintf(fp, "# Pinned CPU memory read tests\n");
for (int i = 0; i < numGpuDevices; i++)
fprintf(fp, "1 %d (C0->G%d->G%d)\n", numBlocks, i, i);
fprintf(fp, "\n");
fprintf(fp, "# Pinned CPU memory write tests\n");
for (int i = 0; i < numGpuDevices; i++)
fprintf(fp, "1 %d (G%d->G%d->C0)\n", numBlocks, i, i);
fprintf(fp, "\n");
// Single link testing GPU testing
fprintf(fp, "# Unidirectional link GPU tests\n");
for (int i = 0; i < numGpuDevices; i++)
for (int j = 0; j < numGpuDevices; j++)
{
if (i == j) continue;
fprintf(fp, "1 %d (G%d->G%d->G%d)\n", numBlocks, i, i, j);
}
fprintf(fp, "\n");
// Bi-directional link testing
fprintf(fp, "# Bi-directional link tests\n");
for (int i = 0; i < numGpuDevices; i++)
for (int j = 0; j < numGpuDevices; j++)
{
if (i == j) continue;
fprintf(fp, "2 %d (G%d->G%d->G%d) (G%d->G%d->G%d)\n", numBlocks, i, i, j, j, j, i);
}
fprintf(fp, "\n");
// Simple uni-directional ring
fprintf(fp, "# Simple unidirectional ring\n");
fprintf(fp, "%d %d", numGpuDevices, numBlocks);
for (int i = 0; i < numGpuDevices; i++)
{
fprintf(fp, " (G%d->G%d->G%d)", i, i, (i+1)%numGpuDevices);
}
fprintf(fp, "\n\n");
// Simple bi-directional ring
fprintf(fp, "# Simple bi-directional ring\n");
fprintf(fp, "%d %d", numGpuDevices * 2, numBlocks);
for (int i = 0; i < numGpuDevices; i++)
fprintf(fp, " (G%d->G%d->G%d)", i, i, (i+1)%numGpuDevices);
for (int i = 0; i < numGpuDevices; i++)
fprintf(fp, " (G%d->G%d->G%d)", i, i, (i+numGpuDevices-1)%numGpuDevices);
fprintf(fp, "\n\n");
// Broadcast from GPU 0
fprintf(fp, "# GPU 0 Broadcast\n");
fprintf(fp, "%d %d", numGpuDevices-1, numBlocks);
for (int i = 1; i < numGpuDevices; i++)
fprintf(fp, " (G%d->G%d->G%d)", 0, 0, i);
fprintf(fp, "\n\n");
// Gather to GPU 0
fprintf(fp, "# GPU 0 Gather\n");
fprintf(fp, "%d %d", numGpuDevices-1, numBlocks);
for (int i = 1; i < numGpuDevices; i++)
fprintf(fp, " (G%d->G%d->G%d)", i, 0, 0);
fprintf(fp, "\n\n");
// Full stress test
fprintf(fp, "# Full stress test\n");
fprintf(fp, "%d %d", numGpuDevices * (numGpuDevices-1), numBlocks);
for (int i = 0; i < numGpuDevices; i++)
for (int j = 0; j < numGpuDevices; j++)
{
if (i == j) continue;
fprintf(fp, " (G%d->G%d->G%d)", i, i, j);
}
fprintf(fp, "\n\n");
// All single-hop XGMI links
int numSingleHopXgmiLinks = 0;
for (int i = 0; i < numGpuDevices; i++)
for (int j = 0; j < numGpuDevices; j++)
{
if (i == j) continue;
uint32_t linkType, hopCount;
HIP_CALL(hipExtGetLinkTypeAndHopCount(i, j, &linkType, &hopCount));
if (linkType == HSA_AMD_LINK_INFO_TYPE_XGMI && hopCount == 1) numSingleHopXgmiLinks++;
}
if (numSingleHopXgmiLinks > 0)
{
fprintf(fp, "# All single-hop links\n");
fprintf(fp, "%d %d", numSingleHopXgmiLinks, numBlocks);
for (int i = 0; i < numGpuDevices; i++)
for (int j = 0; j < numGpuDevices; j++)
{
if (i == j) continue;
uint32_t linkType, hopCount;
HIP_CALL(hipExtGetLinkTypeAndHopCount(i, j, &linkType, &hopCount));
if (linkType == HSA_AMD_LINK_INFO_TYPE_XGMI && hopCount == 1)
{
fprintf(fp, " (G%d G%d F%d)", i, i, j);
}
}
fprintf(fp, "\n\n");
}
fclose(fp);
}
void DisplayTopology()
{
int numGpuDevices;
HIP_CALL(hipGetDeviceCount(&numGpuDevices));
printf("\nDetected topology: %d CPU NUMA node(s) %d GPU device(s)\n", numa_num_configured_nodes(), numGpuDevices);
printf(" |");
for (int j = 0; j < numGpuDevices; j++)
printf(" GPU %02d |", j);
printf(" PCIe Bus ID | Closest NUMA\n");
for (int j = 0; j <= numGpuDevices; j++)
printf("--------+");
printf("--------------+-------------\n");
char pciBusId[20];
for (int i = 0; i < numGpuDevices; i++)
{
printf(" GPU %02d |", i);
for (int j = 0; j < numGpuDevices; j++)
{
if (i == j)
printf(" - |");
else
{
uint32_t linkType, hopCount;
HIP_CALL(hipExtGetLinkTypeAndHopCount(i, j, &linkType, &hopCount));
printf(" %s-%d |",
linkType == HSA_AMD_LINK_INFO_TYPE_HYPERTRANSPORT ? " HT" :
linkType == HSA_AMD_LINK_INFO_TYPE_QPI ? " QPI" :
linkType == HSA_AMD_LINK_INFO_TYPE_PCIE ? "PCIE" :
linkType == HSA_AMD_LINK_INFO_TYPE_INFINBAND ? "INFB" :
linkType == HSA_AMD_LINK_INFO_TYPE_XGMI ? "XGMI" : "????",
hopCount);
}
}
HIP_CALL(hipDeviceGetPCIBusId(pciBusId, 20, i));
printf(" %11s | %d \n", pciBusId, GetClosestNumaNode(i));
}
}
void PopulateTestSizes(size_t const numBytesPerLink,
int const samplingFactor,
std::vector<size_t>& valuesOfN)
{
valuesOfN.clear();
// If the number of bytes is specified, use it
if (numBytesPerLink != 0)
{
if (numBytesPerLink % 4)
{
printf("[ERROR] numBytesPerLink (%lu) must be a multiple of 4\n", numBytesPerLink);
exit(1);
}
size_t N = numBytesPerLink / sizeof(float);
valuesOfN.push_back(N);
}
else
{
// Otherwise generate a range of values
// (Powers of 2, with samplingFactor samples between successive powers of 2)
for (int N = 256; N <= (1<<27); N *= 2)
{
int delta = std::max(32, N / samplingFactor);
int curr = N;
while (curr < N * 2)
{
valuesOfN.push_back(curr);
curr += delta;
}
}
}
}
void ParseMemType(std::string const& token, int const numCpus, int const numGpus, MemType* memType, int* memIndex)
{
char typeChar;
if (sscanf(token.c_str(), " %c %d", &typeChar, memIndex) != 2)
{
printf("[ERROR] Unable to parse memory type token %s - expecting either 'C' or 'G' or 'F' followed by an index\n", token.c_str());
exit(1);
}
switch (typeChar)
{
case 'C': case 'c':
*memType = MEM_CPU;
if (*memIndex < 0 || *memIndex >= numCpus)
{
printf("[ERROR] CPU index must be between 0 and %d (instead of %d)\n", numCpus-1, *memIndex);
exit(1);
}
break;
case 'G': case 'g':
*memType = MEM_GPU;
if (*memIndex < 0 || *memIndex >= numGpus)
{
printf("[ERROR] GPU index must be between 0 and %d (instead of %d)\n", numGpus-1, *memIndex);
exit(1);
}
break;
case 'F': case 'f':
*memType = MEM_GPU_FINE;
if (*memIndex < 0 || *memIndex >= numGpus)
{
printf("[ERROR] GPU index must be between 0 and %d (instead of %d)\n", numGpus-1, *memIndex);
exit(1);
}
break;
default:
printf("[ERROR] Unrecognized memory type %s. Expecting either 'C' or 'G' or 'F'\n", token.c_str());
exit(1);
}
}
// Helper function to parse a list of link definitions
void ParseLinks(char* line, int numCpus, int numGpus, std::vector<Link>& links)
{
// Replace any round brackets or '->' with spaces,
for (int i = 1; line[i]; i++)
if (line[i] == '(' || line[i] == ')' || line[i] == '-' || line[i] == '>' ) line[i] = ' ';
links.clear();
int numLinks = 0;
std::istringstream iss;
iss.clear();
iss.str(line);
iss >> numLinks;
if (iss.fail()) return;
std::string exeMem;
std::string srcMem;
std::string dstMem;
if (numLinks > 0)
{
// Method 1: Take in triples (srcMem, exeMem, dstMem)
int numBlocksToUse;
iss >> numBlocksToUse;
if (numBlocksToUse <= 0 || iss.fail())
{
printf("Parsing error: Number of blocks to use (%d) must be greater than 0\n", numBlocksToUse);
exit(1);
}
links.resize(numLinks);
for (int i = 0; i < numLinks; i++)
{
iss >> srcMem >> exeMem >> dstMem;
if (iss.fail())
{
printf("Parsing error: Unable to read valid Link triplet (possibly missing a SRC or EXE or DST)\n");
exit(1);
}
ParseMemType(srcMem, numCpus, numGpus, &links[i].srcMemType, &links[i].srcIndex);
ParseMemType(exeMem, numCpus, numGpus, &links[i].exeMemType, &links[i].exeIndex);
ParseMemType(dstMem, numCpus, numGpus, &links[i].dstMemType, &links[i].dstIndex);
links[i].numBlocksToUse = numBlocksToUse;
if (links[i].exeMemType != MEM_CPU && links[i].exeMemType != MEM_GPU)
{
printf("[ERROR] Executor must either be CPU ('C') or GPU ('G'), (from (%s->%s->%s %d))\n",
srcMem.c_str(), exeMem.c_str(), dstMem.c_str(), links[i].numBlocksToUse);
exit(1);
}
}
}
else
{
// Method 2: Read in quads (srcMem, exeMem, dstMem, Read common # blocks to use, then read (src, dst) doubles
numLinks *= -1;
links.resize(numLinks);
for (int i = 0; i < numLinks; i++)
{
iss >> srcMem >> exeMem >> dstMem >> links[i].numBlocksToUse;
if (iss.fail())
{
printf("Parsing error: Unable to read valid Link quadruple (possibly missing a SRC or EXE or DST or #CU)\n");
exit(1);
}
ParseMemType(srcMem, numCpus, numGpus, &links[i].srcMemType, &links[i].srcIndex);
ParseMemType(exeMem, numCpus, numGpus, &links[i].exeMemType, &links[i].exeIndex);
ParseMemType(dstMem, numCpus, numGpus, &links[i].dstMemType, &links[i].dstIndex);
if (links[i].exeMemType != MEM_CPU && links[i].exeMemType != MEM_GPU)
{
printf("[ERROR] Executor must either be CPU ('C') or GPU ('G'), (from (%s->%s->%s %d))\n"
, srcMem.c_str(), exeMem.c_str(), dstMem.c_str(), links[i].numBlocksToUse);
exit(1);
}
}
}
}
void EnablePeerAccess(int const deviceId, int const peerDeviceId)
{
int canAccess;
HIP_CALL(hipDeviceCanAccessPeer(&canAccess, deviceId, peerDeviceId));
if (!canAccess)
{
printf("[ERROR] Unable to enable peer access from GPU devices %d to %d\n", peerDeviceId, deviceId);
exit(1);
}
HIP_CALL(hipSetDevice(deviceId));
HIP_CALL(hipDeviceEnablePeerAccess(peerDeviceId, 0));
}
void AllocateMemory(MemType memType, int devIndex, size_t numBytes, float** memPtr)
{
if (numBytes == 0)
{
printf("[ERROR] Unable to allocate 0 bytes\n");
exit(1);
}
if (memType == MEM_CPU)
{
// Set numa policy prior to call to hipHostMalloc
unsigned long nodemask = (1ULL << devIndex);
long retCode = set_mempolicy(MPOL_BIND, &nodemask, sizeof(nodemask)*8);
if (retCode)
{
printf("[ERROR] Unable to set NUMA memory policy to bind to NUMA node %d\n", devIndex);
exit(1);
}
// Allocate host-pinned memory (should respect NUMA mem policy)
HIP_CALL(hipHostMalloc((void **)memPtr, numBytes, hipHostMallocNumaUser));
// Check that the allocated pages are actually on the correct NUMA node
CheckPages((char*)*memPtr, numBytes, devIndex);
// Reset to default numa mem policy
retCode = set_mempolicy(MPOL_DEFAULT, NULL, 8);
if (retCode)
{
printf("[ERROR] Unable reset to default NUMA memory policy\n");
exit(1);
}
}
else if (memType == MEM_GPU)
{
// Allocate GPU memory on appropriate device
HIP_CALL(hipSetDevice(devIndex));
HIP_CALL(hipMalloc((void**)memPtr, numBytes));
}
else if (memType == MEM_GPU_FINE)
{
HIP_CALL(hipSetDevice(devIndex));
HIP_CALL(hipExtMallocWithFlags((void**)memPtr, numBytes, hipDeviceMallocFinegrained));
}
else
{
printf("[ERROR] Unsupported memory type %d\n", memType);
exit(1);
}
}
void DeallocateMemory(MemType memType, int devIndex, float* memPtr)
{
if (memType == MEM_CPU)
{
HIP_CALL(hipHostFree(memPtr));
}
else if (memType == MEM_GPU || memType == MEM_GPU_FINE)
{
HIP_CALL(hipFree(memPtr));
}
}
void CheckPages(char* array, size_t numBytes, int targetId)
{
unsigned long const pageSize = getpagesize();
unsigned long const numPages = (numBytes + pageSize - 1) / pageSize;
std::vector<void *> pages(numPages);
std::vector<int> status(numPages);
pages[0] = array;
for (int i = 1; i < numPages; i++)
{
pages[i] = (char*)pages[i-1] + pageSize;
}
long const retCode = move_pages(0, numPages, pages.data(), NULL, status.data(), 0);
if (retCode)
{
printf("[ERROR] Unable to collect page info\n");
exit(1);
}
size_t mistakeCount = 0;
for (int i = 0; i < numPages; i++)
{
if (status[i] < 0)
{
printf("[ERROR] Unexpected page status %d for page %d\n", status[i], i);
exit(1);
}
if (status[i] != targetId) mistakeCount++;
}
if (mistakeCount > 0)
{
printf("[ERROR] %lu out of %lu pages for memory allocation were not on NUMA node %d\n", mistakeCount, numPages, targetId);
// NOTE: Some older versions of HIP do not properly respect NUMA policy so avoid failing for now
// exit(1);
}
}
// Helper function to either fill a device pointer with pseudo-random data, or to check to see if it matches
void CheckOrFill(ModeType mode, int N, bool isMemset, bool isHipCall, std::vector<float>const& fillPattern, float* ptr)
{
// Prepare reference resultx
float* refBuffer = (float*)malloc(N * sizeof(float));
if (isMemset)
{
if (isHipCall)
{
memset(refBuffer, 42, N * sizeof(float));
}
else
{
for (int i = 0; i < N; i++)
refBuffer[i] = 1234.0f;
}
}
else
{
// Fill with repeated pattern if specified
size_t patternLen = fillPattern.size();
if (patternLen > 0)
{
for (int i = 0; i < N; i++)
refBuffer[i] = fillPattern[i % patternLen];
}
else // Otherwise fill with pseudo-random values
{
for (int i = 0; i < N; i++)
refBuffer[i] = (i % 383 + 31);
}
}
// Either fill the memory with the reference buffer, or compare against it
if (mode == MODE_FILL)
{
HIP_CALL(hipMemcpy(ptr, refBuffer, N * sizeof(float), hipMemcpyDefault));
}
else if (mode == MODE_CHECK)
{
float* hostBuffer = (float*) malloc(N * sizeof(float));
HIP_CALL(hipMemcpy(hostBuffer, ptr, N * sizeof(float), hipMemcpyDefault));
for (int i = 0; i < N; i++)
{
if (refBuffer[i] != hostBuffer[i])
{
printf("[ERROR] Mismatch at element %d Ref: %f Actual: %f\n", i, refBuffer[i], hostBuffer[i]);
exit(1);
}
}
free(hostBuffer);
}
free(refBuffer);
}
std::string GetLinkTypeDesc(uint32_t linkType, uint32_t hopCount)
{
char result[10];
switch (linkType)
{
case HSA_AMD_LINK_INFO_TYPE_HYPERTRANSPORT: sprintf(result, " HT-%d", hopCount); break;
case HSA_AMD_LINK_INFO_TYPE_QPI : sprintf(result, " QPI-%d", hopCount); break;
case HSA_AMD_LINK_INFO_TYPE_PCIE : sprintf(result, "PCIE-%d", hopCount); break;
case HSA_AMD_LINK_INFO_TYPE_INFINBAND : sprintf(result, "INFB-%d", hopCount); break;
case HSA_AMD_LINK_INFO_TYPE_XGMI : sprintf(result, "XGMI-%d", hopCount); break;
default: sprintf(result, "??????");
}
return result;
}
std::string GetDesc(MemType srcMemType, int srcIndex,
MemType dstMemType, int dstIndex)
{
if (srcMemType == MEM_CPU)
{
if (dstMemType == MEM_CPU)
return (srcIndex == dstIndex) ? "LOCAL" : "NUMA";
else if (dstMemType == MEM_GPU || dstMemType == MEM_GPU_FINE)
return "PCIE";
else
goto error;
}
else if (srcMemType == MEM_GPU || srcMemType == MEM_GPU_FINE)
{
if (dstMemType == MEM_CPU)
return "PCIE";
else if (dstMemType == MEM_GPU || dstMemType == MEM_GPU_FINE)
{
if (srcIndex == dstIndex) return "LOCAL";
else
{
uint32_t linkType, hopCount;
HIP_CALL(hipExtGetLinkTypeAndHopCount(srcIndex, dstIndex, &linkType, &hopCount));
return GetLinkTypeDesc(linkType, hopCount);
}
}
else
goto error;
}
error:
printf("[ERROR] Unrecognized memory type\n");
exit(1);
}
std::string GetLinkDesc(Link const& link)
{
return GetDesc(link.srcMemType, link.srcIndex, link.exeMemType, link.exeIndex) + "-"
+ GetDesc(link.exeMemType, link.exeIndex, link.dstMemType, link.dstIndex);
}
void RunLink(EnvVars const& ev, size_t const N, int const iteration, Link& link)
{
// GPU execution agent
if (link.exeMemType == MEM_GPU)
{
// Switch to executing GPU
HIP_CALL(hipSetDevice(link.exeIndex));
bool recordStart = (!ev.useSingleSync || iteration == 0);
bool recordStop = (!ev.useSingleSync || iteration == ev.numIterations - 1);
int const initOffset = ev.byteOffset / sizeof(float);
if (ev.useHipCall)
{
// Record start event
if (recordStart) HIP_CALL(hipEventRecord(link.startEvent, link.stream));
// Execute hipMemset / hipMemcpy
if (ev.useMemset)
HIP_CALL(hipMemsetAsync(link.dstMem + initOffset, 42, N * sizeof(float), link.stream));
else
HIP_CALL(hipMemcpyAsync(link.dstMem + initOffset,
link.srcMem + initOffset,
N * sizeof(float), hipMemcpyDefault,
link.stream));
// Record stop event
if (recordStop) HIP_CALL(hipEventRecord(link.stopEvent, link.stream));
}
else
{
if (!ev.combineTiming && recordStart) HIP_CALL(hipEventRecord(link.startEvent, link.stream));
hipExtLaunchKernelGGL(ev.useMemset ? GpuMemsetKernel : GpuCopyKernel,
dim3(link.numBlocksToUse, 1, 1),
dim3(BLOCKSIZE, 1, 1),
0, link.stream,
(ev.combineTiming && recordStart) ? link.startEvent : NULL,
(ev.combineTiming && recordStop) ? link.stopEvent : NULL,
0, link.blockParam);
if (!ev.combineTiming & recordStop) HIP_CALL(hipEventRecord(link.stopEvent, link.stream));
}
// Synchronize per iteration, unless in single sync mode, in which case
// synchronize during last warmup / last actual iteration
if (!ev.useSingleSync || iteration == -1 || iteration == ev.numIterations - 1)
{
HIP_CALL(hipStreamSynchronize(link.stream));
}
if (iteration >= 0)
{
// Record GPU timing
if (!ev.useSingleSync || iteration == ev.numIterations - 1)
{
HIP_CALL(hipEventSynchronize(link.stopEvent));
float gpuDeltaMsec;
HIP_CALL(hipEventElapsedTime(&gpuDeltaMsec, link.startEvent, link.stopEvent));
link.totalTime += gpuDeltaMsec;
}
}
}
else if (link.exeMemType == MEM_CPU) // CPU execution agent
{
// Force this thread and all child threads onto correct NUMA node
if (numa_run_on_node(link.exeIndex))
{
printf("[ERROR] Unable to set CPU to NUMA node %d\n", link.exeIndex);
exit(1);
}
std::vector<std::thread> childThreads;
auto cpuStart = std::chrono::high_resolution_clock::now();
// Launch child-threads to perform memcopies
for (int i = 0; i < ev.numCpuPerLink; i++)
childThreads.push_back(std::thread(ev.useMemset ? CpuMemsetKernel : CpuCopyKernel, std::ref(link.blockParam[i])));
// Wait for child-threads to finish
for (int i = 0; i < ev.numCpuPerLink; i++)
childThreads[i].join();
auto cpuDelta = std::chrono::high_resolution_clock::now() - cpuStart;
// Record time if not a warmup iteration
if (iteration >= 0)
link.totalTime += (std::chrono::duration_cast<std::chrono::duration<double>>(cpuDelta).count() * 1000.0);
}
}
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