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e6fbd1759c
This follow-up patch completes centralization of kselftest.h and ksefltest_harness.h includes in remaining seltests files, replacing all relative paths with a non-relative paths using shared -I include path in lib.mk Tested with gcc-13.3 and clang-18.1, and cross-compiled successfully on riscv, arm64, x86_64 and powerpc arch. [reddybalavignesh9979@gmail.com: add selftests include path for kselftest.h] Link: https://lkml.kernel.org/r/20251017090201.317521-1-reddybalavignesh9979@gmail.com Link: https://lkml.kernel.org/r/20251016104409.68985-1-reddybalavignesh9979@gmail.com Signed-off-by: Bala-Vignesh-Reddy <reddybalavignesh9979@gmail.com> Suggested-by: Andrew Morton <akpm@linux-foundation.org> Link: https://lore.kernel.org/lkml/20250820143954.33d95635e504e94df01930d0@linux-foundation.org/ Reviewed-by: Wei Yang <richard.weiyang@gmail.com> Cc: David Hildenbrand <david@redhat.com> Cc: David S. Miller <davem@davemloft.net> Cc: Eric Dumazet <edumazet@google.com> Cc: Günther Noack <gnoack@google.com> Cc: Jakub Kacinski <kuba@kernel.org> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mickael Salaun <mic@digikod.net> Cc: Ming Lei <ming.lei@redhat.com> Cc: Paolo Abeni <pabeni@redhat.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Simon Horman <horms@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
94 lines
2.1 KiB
C
94 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <math.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <sys/timeb.h>
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#include <sched.h>
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#include <errno.h>
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#include <string.h>
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#include <time.h>
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#include "kselftest.h"
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#define MSEC_PER_SEC 1000L
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#define NSEC_PER_MSEC 1000000L
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void usage(char *name) {
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printf ("Usage: %s cpunum\n", name);
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}
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int main(int argc, char **argv) {
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unsigned int i, cpu, fd;
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char msr_file_name[64];
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long long tsc, old_tsc, new_tsc;
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long long aperf, old_aperf, new_aperf;
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long long mperf, old_mperf, new_mperf;
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struct timespec before, after;
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long long int start, finish, total;
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cpu_set_t cpuset;
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if (argc != 2) {
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usage(argv[0]);
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return 1;
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}
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errno = 0;
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cpu = strtol(argv[1], (char **) NULL, 10);
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if (errno) {
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usage(argv[0]);
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return 1;
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}
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sprintf(msr_file_name, "/dev/cpu/%d/msr", cpu);
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fd = open(msr_file_name, O_RDONLY);
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if (fd == -1) {
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printf("/dev/cpu/%d/msr: %s\n", cpu, strerror(errno));
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return KSFT_SKIP;
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}
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CPU_ZERO(&cpuset);
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CPU_SET(cpu, &cpuset);
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if (sched_setaffinity(0, sizeof(cpu_set_t), &cpuset)) {
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perror("Failed to set cpu affinity");
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return 1;
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}
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if (clock_gettime(CLOCK_MONOTONIC, &before) < 0) {
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perror("clock_gettime");
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return 1;
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}
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pread(fd, &old_tsc, sizeof(old_tsc), 0x10);
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pread(fd, &old_aperf, sizeof(old_mperf), 0xe7);
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pread(fd, &old_mperf, sizeof(old_aperf), 0xe8);
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for (i=0; i<0x8fffffff; i++) {
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sqrt(i);
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}
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if (clock_gettime(CLOCK_MONOTONIC, &after) < 0) {
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perror("clock_gettime");
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return 1;
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}
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pread(fd, &new_tsc, sizeof(new_tsc), 0x10);
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pread(fd, &new_aperf, sizeof(new_mperf), 0xe7);
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pread(fd, &new_mperf, sizeof(new_aperf), 0xe8);
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tsc = new_tsc-old_tsc;
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aperf = new_aperf-old_aperf;
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mperf = new_mperf-old_mperf;
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start = before.tv_sec*MSEC_PER_SEC + before.tv_nsec/NSEC_PER_MSEC;
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finish = after.tv_sec*MSEC_PER_SEC + after.tv_nsec/NSEC_PER_MSEC;
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total = finish - start;
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printf("runTime: %4.2f\n", 1.0*total/MSEC_PER_SEC);
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printf("freq: %7.0f\n", tsc / (1.0*aperf / (1.0 * mperf)) / total);
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return 0;
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}
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