From ebf2f07de91d9e341acc6df25e928e87b25b958d Mon Sep 17 00:00:00 2001 From: Joshua Bakita Date: Tue, 26 Nov 2024 10:30:57 -0500 Subject: Rewrite libsmctrl_test_gpc_info to output clearly and take a GPU ID --- libsmctrl_test_gpc_info.c | 33 +++++++++++++++++++++++++++------ 1 file changed, 27 insertions(+), 6 deletions(-) diff --git a/libsmctrl_test_gpc_info.c b/libsmctrl_test_gpc_info.c index 5ef44b1..9b2b963 100644 --- a/libsmctrl_test_gpc_info.c +++ b/libsmctrl_test_gpc_info.c @@ -1,14 +1,35 @@ +// Copyright 2024 Joshua Bakita +#define _GNU_SOURCE +#include +#include #include #include +#include +#include + #include "libsmctrl.h" -int main() { - uint32_t num_gpcs; - uint64_t* masks; - libsmctrl_get_gpc_info(&num_gpcs, &masks, 1); - printf("Num GPCs: %d\n", num_gpcs); +int main(int argc, char** argv) { + uint32_t num_gpcs = 0, num_tpcs = 0; + uint64_t* masks = NULL; + int res; + int gpu_id = 0; + // Optionally support specifying the GPU ID to query via an argument + // Important: This GPU ID must match the ID used by the nvdebug module. See + // the documentation on libsmctrl_get_gpc_info() for details. + if (argc > 2 || (argc == 2 && (!strcmp(argv[1], "--help") || !strcmp(argv[1], "-h")))) { + fprintf(stderr, "Usage: %s \n", argv[0]); + return 1; + } + if (argc > 1) + gpu_id = atoi(argv[1]); + if ((res = libsmctrl_get_gpc_info(&num_gpcs, &masks, gpu_id)) != 0) + error(1, res, "libsmctrl_get_gpc_info() failed"); + printf("%s: GPU%d has %d enabled GPCs.\n", program_invocation_name, gpu_id, num_gpcs); for (int i = 0; i < num_gpcs; i++) { - printf("Mask of TPCs associated with GPC %d: %#018lx\n", i, masks[i]); + num_tpcs += __builtin_popcountl(masks[i]); + printf("%s: Mask of %d TPCs associated with GPC %d: %#018lx\n", program_invocation_name, __builtin_popcountl(masks[i]), i, masks[i]); } + printf("%s: Total of %u enabled TPCs.\n", program_invocation_name, num_tpcs); return 0; } -- cgit v1.2.2