Adding interactive mode for profiling purposes (#150)
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gilbertlee-amd
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GitHub
родитель
c49de785d2
Коммит
fd94f4fa25
@@ -34,374 +34,401 @@ THE SOFTWARE.
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int main(int argc, char **argv)
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{
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// Display usage
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if (argc <= 1)
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{
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printf("Usage: %s configFile <N>\n", argv[0]);
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printf("- configFile: file describing topologies to test\n");
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printf(" Each line should contain a single topology\n");
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printf(" L - number of links followed by L white-space separated triples (src, dst, # blocks)\n");
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printf(" For example:\n");
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printf(" 2 0 1 3 1 0 3\n");
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printf(" would define 2 links each using 3 threadblocks from GPU0 -> GPU1, and GPU1->GPU0\n");
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printf("- N: (Optional) Number of bytes to transfer per link.\n");
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printf(" If not specified, defaults to 2^28=256MB. Must be a multiple of 128 bytes\n");
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printf("\n");
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printf("Environment variables:\n");
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printf("======================\n");
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printf(" USE_HIP_CALL - Use hip calls (hipMemcpyAsync/hipMemset) instead of kernel\n");
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printf(" USE_MEMSET - Write constant value (instead of doing a copy)\n");
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printf(" USE_COARSE_MEM - Use coarse-grained dst GPU memory (instead of fine-grained)\n");
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printf(" USE_SINGLE_SYNC - Only synchronize once at end of iterations (disables GPU times)\n");
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exit(0);
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}
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// Display usage
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if (argc <= 1)
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{
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printf("Usage: %s configFile <N>\n", argv[0]);
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printf("- configFile: file describing topologies to test\n");
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printf(" Each line should contain a single topology\n");
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printf(" L - number of links followed by L white-space separated triples (src, dst, # blocks)\n");
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printf(" For example:\n");
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printf(" 2 0 1 3 1 0 3\n");
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printf(" would define 2 links each using 3 threadblocks from GPU0 -> GPU1, and GPU1->GPU0\n");
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printf("- N: (Optional) Number of bytes to transfer per link.\n");
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printf(" If not specified, defaults to 2^28=256MB. Must be a multiple of 128 bytes\n");
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printf("\n");
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printf("Environment variables:\n");
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printf("======================\n");
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printf(" USE_HIP_CALL - Use hip calls (hipMemcpyAsync/hipMemset) instead of kernel\n");
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printf(" USE_MEMSET - Write constant value (instead of doing a copy)\n");
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printf(" USE_COARSE_MEM - Use coarse-grained dst GPU memory (instead of fine-grained)\n");
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printf(" USE_SINGLE_SYNC - Only synchronize once at end of iterations (disables GPU times)\n");
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printf(" USE_INTERACTIVE - Waits for user-input prior to start and after transfer loop (for profiling)\n");
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printf(" USE_ITERATIONS=N - Sets number of iterations to run (default is 10)\n");
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exit(0);
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}
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// Parse number of bytes to use (or use default if not specified)
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size_t const numBytesPerLink = argc > 2 ? atoll(argv[2]) : (1<<28);
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size_t N = numBytesPerLink / sizeof(float);
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if (numBytesPerLink % 128)
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{
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printf("[ERROR] numBytesPerLink (%lu) must be a multiple of 128\n", numBytesPerLink);
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exit(1);
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}
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printf("Operating on %zu bytes per link (%zu floats)\n", numBytesPerLink, N);
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// Parse number of bytes to use (or use default if not specified)
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size_t const numBytesPerLink = argc > 2 ? atoll(argv[2]) : (1<<28);
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size_t N = numBytesPerLink / sizeof(float);
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if (numBytesPerLink % 128)
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{
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printf("[ERROR] numBytesPerLink (%lu) must be a multiple of 128\n", numBytesPerLink);
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exit(1);
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}
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printf("Operating on %zu bytes per link (%zu floats)\n", numBytesPerLink, N);
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bool useHipCall = getenv("USE_HIP_CALL");
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bool useMemset = getenv("USE_MEMSET");
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bool useCoarseMem = getenv("USE_COARSE_MEM");
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bool useSingleSync = getenv("USE_SINGLE_SYNC");
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// Collect environment variables / display current run configuration
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bool useHipCall = getenv("USE_HIP_CALL");
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bool useMemset = getenv("USE_MEMSET");
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bool useCoarseMem = getenv("USE_COARSE_MEM");
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bool useSingleSync = getenv("USE_SINGLE_SYNC");
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bool useInteractive = getenv("USE_INTERACTIVE");
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printf("Running %s%s tests (control using USE_HIP_CALL/USE_MEMSET)\n",
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useHipCall ? "hipMem" : "mem",
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useMemset ? "set" : "cpy");
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printf("Destination memory: %s-grained (control using USE_COARSE_MEM)\n",
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useCoarseMem ? "coarse" : "fine");
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if (useHipCall && !useMemset)
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{
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if (getenv("HSA_ENABLE_SDMA") && !strcmp(getenv("HSA_ENABLE_SDMA"), "0"))
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printf("Using blit kernels for hipMemcpy. (HSA_ENABLE_SDMA=0)\n");
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else
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printf("Using DMA copy engines (disable by setting HSA_ENABLE_SDMA=0)\n");
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}
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if (useSingleSync)
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printf("Synchronizing only once, after all iterations (disables GPU timers)\n");
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int numWarmups = 3;
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int numIterations = getenv("USE_ITERATIONS") ? atoi(getenv("USE_ITERATIONS")) : 10;
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printf("Running %s%s tests (control using USE_HIP_CALL/USE_MEMSET)\n",
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useHipCall ? "hipMem" : "mem",
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useMemset ? "set" : "cpy");
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printf("Destination memory: %s-grained (control using USE_COARSE_MEM)\n",
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useCoarseMem ? "coarse" : "fine");
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if (useHipCall && !useMemset)
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{
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if (getenv("HSA_ENABLE_SDMA") && !strcmp(getenv("HSA_ENABLE_SDMA"), "0"))
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printf("Using blit kernels for hipMemcpy. (HSA_ENABLE_SDMA=0)\n");
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else
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printf("Synchronizing per iteration (disable via USE_SINGLE_SYNC)\n");
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printf("Using DMA copy engines (disable by setting HSA_ENABLE_SDMA=0)\n");
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}
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if (useSingleSync)
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printf("Synchronizing only once, after all iterations (disables GPU timers)\n");
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else
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printf("Synchronizing per iteration (disable via USE_SINGLE_SYNC)\n");
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// Currently an environment variable is required in order to enable fine-grained VRAM allocations
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if (!useCoarseMem && !getenv("HSA_FORCE_FINE_GRAIN_PCIE"))
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{
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printf("[ERROR] Currently you must set HSA_FORCE_FINE_GRAIN_PCIE=1 prior to execution\n");
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exit(1);
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}
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if (useInteractive)
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printf("Running in interactive mode (USE_INTERACTIVE)\n");
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else
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printf("Running in non-interactive mode (enable interactive mode via USE_INTERACTIVE)\n");
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// Collect the number of available GPUs on this machine
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int numDevices;
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HIP_CALL(hipGetDeviceCount(&numDevices));
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if (numDevices < 1)
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{
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printf("[ERROR] No GPU devices found\n");
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exit(1);
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}
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printf("Executing %d warmup iteration(s), and %d timed iteration(s) (Set via USE_ITERATION=#)\n",
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numWarmups, numIterations);
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// Print header
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printf("%*s", MAX_NAME_LEN, "");
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printf("%*s | ", 8*(numDevices+1), "Bandwidth (GB/s)");
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printf("%*s", 8*(numDevices+1), "Duration (msec)");
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printf(" | Overhead\n");
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printf("%-*s", MAX_NAME_LEN, "Configuration");
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// Currently an environment variable is required in order to enable fine-grained VRAM allocations
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if (!useCoarseMem && !getenv("HSA_FORCE_FINE_GRAIN_PCIE"))
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{
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printf("[ERROR] Currently you must set HSA_FORCE_FINE_GRAIN_PCIE=1 prior to execution\n");
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exit(1);
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}
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// Collect the number of available GPUs on this machine
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int numDevices;
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HIP_CALL(hipGetDeviceCount(&numDevices));
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if (numDevices < 1)
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{
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printf("[ERROR] No GPU devices found\n");
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exit(1);
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}
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// Print header
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printf("%*s", MAX_NAME_LEN, "");
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printf("%*s | ", 8*(numDevices+1), "Bandwidth (GB/s)");
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printf("%*s", 8*(numDevices+1), "Duration (msec)");
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printf(" | Overhead\n");
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printf("%-*s", MAX_NAME_LEN, "Configuration");
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for (int i = 0; i < numDevices; i++)
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printf(" GPU %02d", i);
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printf(" Total");
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printf(" | ");
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for (int i = 0; i < numDevices; i++)
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printf(" GPU %02d", i);
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printf(" CpuTime");
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printf(" | (msec)\n");
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for (int i = 0; i < MAX_NAME_LEN + (8 * (numDevices + 1)); i++) printf("=");
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printf("=|=");
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for (int i = 0; i < (8 * (numDevices + 1)); i++) printf("=");
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printf("=|=========\n");
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// Read configuration file
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FILE* fp = fopen(argv[1], "r");
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if (!fp)
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{
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printf("[ERROR] Unable to open link configuration file: [%s]\n", argv[1]);
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exit(1);
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}
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// Track links that get used
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std::map<std::pair<int, int>, int> linkMap;
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char line[2048];
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while(fgets(line, 2048, fp))
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{
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// Parse links from configuration file
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std::vector<Link> links;
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ParseLinks(line, links);
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int const numLinks = links.size();
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if (numLinks == 0) continue;
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// Clear counters
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int linkCount[numDevices];
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for (int i = 0; i < numDevices; i++)
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printf(" GPU %02d", i);
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printf(" Total");
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linkCount[i] = 0;
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float* linkSrcMem[numLinks];
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float* linkDstMem[numLinks];
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hipStream_t streams[numLinks];
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hipEvent_t startEvents[numLinks];
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hipEvent_t stopEvents[numLinks];
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std::vector<BlockParam> cpuBlockParams[numLinks];
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BlockParam* gpuBlockParams[numLinks];
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char name[MAX_NAME_LEN+1] = {};
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for (int i = 0; i < numLinks; i++)
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{
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int const src = links[i].srcGpu;
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int const dst = links[i].dstGpu;
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if (src < 0 || src >= numDevices ||
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dst < 0 || dst >= numDevices)
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{
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printf("[ERROR] Invalid link (%d to %d). Total devices: %d\n", src, dst, numDevices);
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exit(1);
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}
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snprintf(name + strlen(name), MAX_NAME_LEN, "%d->%d:%d ", src, dst, links[i].numBlocksToUse);
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// Enable peer-to-peer access if this is the first time seeing this pair
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auto linkPair = std::make_pair(src, dst);
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linkMap[linkPair]++;
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if (linkMap[linkPair] == 1)
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{
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int canAccess;
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HIP_CALL(hipDeviceCanAccessPeer(&canAccess, src, dst));
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if (!canAccess)
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{
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printf("[ERROR] Unable to enable peer access between device %d and %d\n", src, dst);
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exit(1);
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}
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HIP_CALL(hipSetDevice(src));
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HIP_CALL(hipDeviceEnablePeerAccess(dst, 0));
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}
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// Count # of links / total blocks each GPU will be working on
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linkCount[src]++;
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// Allocate GPU memory on source GPU / streams / events
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HIP_CALL(hipSetDevice(links[i].srcGpu));
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HIP_CALL(hipStreamCreate(&streams[i]));
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HIP_CALL(hipEventCreate(&startEvents[i]));
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HIP_CALL(hipEventCreate(&stopEvents[i]));
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HIP_CALL(hipMalloc((void **)&linkSrcMem[i], numBytesPerLink));
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HIP_CALL(hipMalloc((void**)&gpuBlockParams[i], sizeof(BlockParam) * numLinks));
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CheckOrFill(N, linkSrcMem[i], false, useMemset, useHipCall);
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// Allocate GPU memory on destination GPU
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HIP_CALL(hipSetDevice(links[i].dstGpu));
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if (useCoarseMem)
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HIP_CALL(hipMalloc((void**)&linkDstMem[i], numBytesPerLink));
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else
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HIP_CALL(hipExtMallocWithFlags((void**)&linkDstMem[i], numBytesPerLink, hipDeviceMallocFinegrained));
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// Each block needs to know src/dst pointers and how many elements to transfer
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// Figure out the sub-array each block does for this link
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// NOTE: Have each sub-array to work on multiple of 32-floats (128-bytes),
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// but divide as evenly as possible
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// NOTE: N is always a multiple of 32
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int blocksWithExtra = (N / 32) % links[i].numBlocksToUse;
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int perBlockBaseN = (N / 32) / links[i].numBlocksToUse * 32;
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for (int j = 0; j < links[i].numBlocksToUse; j++)
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{
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BlockParam param;
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param.N = perBlockBaseN + ((j < blocksWithExtra) ? 32 : 0);
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param.src = linkSrcMem[i] + ((j * perBlockBaseN) + ((j < blocksWithExtra) ?
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j : blocksWithExtra) * 32);
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param.dst = linkDstMem[i] + ((j * perBlockBaseN) + ((j < blocksWithExtra) ?
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j : blocksWithExtra) * 32);
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cpuBlockParams[i].push_back(param);
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}
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HIP_CALL(hipMemcpy(gpuBlockParams[i], cpuBlockParams[i].data(),
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sizeof(BlockParam) * links[i].numBlocksToUse, hipMemcpyHostToDevice));
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}
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// Launch kernels (warmup iterations are not counted)
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double totalCpuTime = 0;
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double totalGpuTime[numDevices];
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for (int i = 0; i < numDevices; i++) totalGpuTime[i] = 0.0;
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for (int iteration = -numWarmups; iteration < numIterations; iteration++)
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{
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if (useInteractive && iteration == 0)
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{
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printf("Hit <Enter> to continue: ");
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scanf("%*c");
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printf("\n");
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}
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auto cpuStart = std::chrono::high_resolution_clock::now();
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#pragma omp parallel for num_threads(numLinks)
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for (int i = 0; i < numLinks; i++)
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{
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HIP_CALL(hipSetDevice(links[i].srcGpu));
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HIP_CALL(hipEventRecord(startEvents[i], streams[i]));
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if (useHipCall)
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{
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if (useMemset)
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{
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HIP_CALL(hipMemsetAsync(linkDstMem[i], 42, numBytesPerLink, streams[i]));
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}
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else
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{
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HIP_CALL(hipMemcpyAsync(linkDstMem[i], linkSrcMem[i],
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numBytesPerLink, hipMemcpyDeviceToDevice,
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streams[i]));
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}
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}
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else
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{
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if (useMemset)
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{
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hipLaunchKernelGGL(MemsetKernel,
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dim3(links[i].numBlocksToUse, 1, 1),
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dim3(BLOCKSIZE, 1, 1),
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0,
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streams[i],
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gpuBlockParams[i]);
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}
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else
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{
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hipLaunchKernelGGL(CopyKernel,
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dim3(links[i].numBlocksToUse, 1, 1),
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dim3(BLOCKSIZE, 1, 1),
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0,
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streams[i],
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gpuBlockParams[i]);
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}
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}
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HIP_CALL(hipEventRecord(stopEvents[i], streams[i]));
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}
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// Synchronize per iteration, unless in single sync mode, in which case
|
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// synchronize during last warmup / last actual iteration
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if (!useSingleSync || iteration == -1 || iteration == numIterations - 1)
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{
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for (int i = 0; i < numLinks; i++)
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hipStreamSynchronize(streams[i]);
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}
|
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auto cpuDelta = std::chrono::high_resolution_clock::now() - cpuStart;
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double deltaSec = std::chrono::duration_cast<std::chrono::duration<double>>(cpuDelta).count();
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if (iteration >= 0)
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{
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totalCpuTime += deltaSec;
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|
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for (int i = 0; i < numDevices; i++)
|
||||
{
|
||||
// Collect GPU information only if this is the last iteration for single sync mode
|
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if (useSingleSync && iteration != numIterations - 1)
|
||||
{
|
||||
totalGpuTime[i] = 0.00;
|
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}
|
||||
else
|
||||
{
|
||||
// Multiple links running on the same device may be running simultaneously
|
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// so try to figure out the first/last event across all links
|
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float maxTime = 0.0f;
|
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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;
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|
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float gpuDeltaMsec;
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HIP_CALL(hipEventElapsedTime(&gpuDeltaMsec, startEvents[j], stopEvents[k]));
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maxTime = std::max(maxTime, gpuDeltaMsec);
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}
|
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}
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totalGpuTime[i] += maxTime / 1000.0;
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}
|
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}
|
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}
|
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}
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|
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if (useInteractive)
|
||||
{
|
||||
printf("Transfers complete. Hit <Enter> to continue: ");
|
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scanf("%*c");
|
||||
printf("\n");
|
||||
}
|
||||
|
||||
// Validate that each link has transferred correctly
|
||||
for (int i = 0; i < numLinks; i++)
|
||||
CheckOrFill(N, linkDstMem[i], true, useMemset, useHipCall);
|
||||
|
||||
// Report timings
|
||||
printf("%-*s", MAX_NAME_LEN, name);
|
||||
for (int i = 0; i < numDevices; i++)
|
||||
{
|
||||
if (linkCount[i] == 0)
|
||||
{
|
||||
printf("%8.3f", 0.0f);
|
||||
}
|
||||
else
|
||||
{
|
||||
if (!useSingleSync)
|
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totalGpuTime[i] /= (1.0 * numIterations);
|
||||
printf("%8.3f", (linkCount[i] * numBytesPerLink / 1.0E9) / totalGpuTime[i]);
|
||||
}
|
||||
}
|
||||
// Print off bandwidth (based on CPU wall-time timer)
|
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totalCpuTime /= numIterations;
|
||||
printf("%8.3f", (numLinks * numBytesPerLink / 1.0E9) / totalCpuTime);
|
||||
printf(" | ");
|
||||
|
||||
double maxGpuTime = 0;
|
||||
for (int i = 0; i < numDevices; i++)
|
||||
printf(" GPU %02d", i);
|
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printf(" CpuTime");
|
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printf(" | (msec)\n");
|
||||
|
||||
for (int i = 0; i < MAX_NAME_LEN + (8 * (numDevices + 1)); i++) printf("=");
|
||||
printf("=|=");
|
||||
for (int i = 0; i < (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);
|
||||
if (linkCount[i] == 0)
|
||||
{
|
||||
printf("%8.3f", 0.0f);
|
||||
}
|
||||
else
|
||||
{
|
||||
printf("%8.3f", totalGpuTime[i] * 1000.0f);
|
||||
maxGpuTime = std::max(maxGpuTime, totalGpuTime[i]);
|
||||
}
|
||||
}
|
||||
printf("%8.3f | %8.3f\n", totalCpuTime * 1000.0f, (totalCpuTime - maxGpuTime) * 1000.0f);
|
||||
|
||||
// Track links that get used
|
||||
std::map<std::pair<int, int>, int> linkMap;
|
||||
|
||||
char line[2048];
|
||||
while(fgets(line, 2048, fp))
|
||||
// Release GPU memory
|
||||
for (int i = 0; i < numLinks; i++)
|
||||
{
|
||||
// Parse links from configuration file
|
||||
std::vector<Link> links;
|
||||
ParseLinks(line, links);
|
||||
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]));
|
||||
|
||||
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, useMemset, useHipCall);
|
||||
|
||||
// Allocate GPU memory on destination GPU
|
||||
HIP_CALL(hipSetDevice(links[i].dstGpu));
|
||||
if (useCoarseMem)
|
||||
HIP_CALL(hipMalloc((void**)&linkDstMem[i], numBytesPerLink));
|
||||
else
|
||||
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 (useHipCall)
|
||||
{
|
||||
if (useMemset)
|
||||
{
|
||||
HIP_CALL(hipMemsetAsync(linkDstMem[i], 42, numBytesPerLink, streams[i]));
|
||||
}
|
||||
else
|
||||
{
|
||||
HIP_CALL(hipMemcpyAsync(linkDstMem[i], linkSrcMem[i],
|
||||
numBytesPerLink, hipMemcpyDeviceToDevice,
|
||||
streams[i]));
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
if (useMemset)
|
||||
{
|
||||
hipLaunchKernelGGL(MemsetKernel,
|
||||
dim3(links[i].numBlocksToUse, 1, 1),
|
||||
dim3(BLOCKSIZE, 1, 1),
|
||||
0,
|
||||
streams[i],
|
||||
gpuBlockParams[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]));
|
||||
}
|
||||
|
||||
// Synchronize per iteration, unless in single sync mode, in which case
|
||||
// synchronize during last warmup / last actual iteration
|
||||
if (!useSingleSync || iteration == -1 || iteration == numIterations - 1)
|
||||
{
|
||||
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++)
|
||||
{
|
||||
// Collect GPU information only if this is the last iteration for single sync mode
|
||||
if (useSingleSync && iteration != numIterations - 1)
|
||||
{
|
||||
totalGpuTime[i] = 0.00;
|
||||
}
|
||||
else
|
||||
{
|
||||
// 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, useMemset, useHipCall);
|
||||
|
||||
// Report timings
|
||||
printf("%-*s", MAX_NAME_LEN, name);
|
||||
for (int i = 0; i < numDevices; i++)
|
||||
{
|
||||
if (linkCount[i] == 0)
|
||||
{
|
||||
printf("%8.3f", 0.0f);
|
||||
}
|
||||
else
|
||||
{
|
||||
if (!useSingleSync)
|
||||
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", (numLinks * numBytesPerLink / 1.0E9) / totalCpuTime);
|
||||
printf(" | ");
|
||||
|
||||
double maxGpuTime = 0;
|
||||
for (int i = 0; i < numDevices; i++)
|
||||
{
|
||||
if (linkCount[i] == 0)
|
||||
{
|
||||
printf("%8.3f", 0.0f);
|
||||
}
|
||||
else
|
||||
{
|
||||
printf("%8.3f", totalGpuTime[i] * 1000.0f);
|
||||
maxGpuTime = std::max(maxGpuTime, totalGpuTime[i]);
|
||||
}
|
||||
}
|
||||
printf("%8.3f | %8.3f\n", totalCpuTime * 1000.0f, (totalCpuTime - maxGpuTime) * 1000.0f);
|
||||
|
||||
// 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);
|
||||
}
|
||||
fclose(fp);
|
||||
|
||||
// Print link information
|
||||
for (int i = 0; i < MAX_NAME_LEN + (8 * (numDevices + 1)); i++) printf("=");
|
||||
printf("=|=");
|
||||
for (int i = 0; i < (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;
|
||||
// Print link information
|
||||
for (int i = 0; i < MAX_NAME_LEN + (8 * (numDevices + 1)); i++) printf("=");
|
||||
printf("=|=");
|
||||
for (int i = 0; i < (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;
|
||||
}
|
||||
|
||||
Ссылка в новой задаче
Block a user