118 lines
2.4 KiB
C
118 lines
2.4 KiB
C
#define _GNU_SOURCE
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <pthread.h>
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#include <errno.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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#include <sys/mman.h>
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#include <unistd.h>
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#include <sys/syscall.h> /* For SYS_xxx definitions */
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#include <linux/futex.h>
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#include <sys/time.h>
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#include <string.h>
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#include <signal.h>
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int passed = 0;
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pthread_t thr;
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unsigned long mem; /* delay functions issue ld/st instructions on this address */
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double nspw; /* nsec per work */
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/* Timer related macros */
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#define TS2NS(sec, nsec) ((unsigned long)(sec) * 1000000000ULL + (unsigned long)(nsec))
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static inline void fixed_size_work() {
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asm volatile(
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"movq $0, %%rcx\n\t"
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"1:\t"
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"addq $1, %%rcx\n\t"
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"cmpq $99, %%rcx\n\t"
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"jle 1b\n\t"
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:
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:
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: "rcx", "cc");
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}
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static inline void bulk_fsw(unsigned long n) {
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int j;
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for (j = 0; j < (n); j++) {
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fixed_size_work();
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}
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}
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#define N_INIT 1000000
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void fwq_init() {
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struct timespec start, end;
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unsigned long nsec;
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int i;
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clock_gettime(CLOCK_THREAD_CPUTIME_ID, &start);
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bulk_fsw(N_INIT);
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clock_gettime(CLOCK_THREAD_CPUTIME_ID, &end);
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nsec = (TS2NS(end.tv_sec, end.tv_nsec) - TS2NS(start.tv_sec, start.tv_nsec));
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nspw = nsec / (double)N_INIT;
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printf("nsec=%ld, nspw=%f\n", nsec, nspw);
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}
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void fwq(long delay_nsec) {
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if (delay_nsec < 0) {
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printf("%s: delay_nsec<0\n", __FUNCTION__);
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}
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//printf("delay_nsec=%ld,count=%f\n", delay_nsec, delay_nsec / nspw);
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bulk_fsw(delay_nsec / nspw);
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}
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void *util_thread(void *arg) {
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int rc;
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fwq(1000*1000);
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return NULL;
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}
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int
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main(int argc, char **argv)
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{
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int rc;
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pthread_attr_t attr;
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struct sigaction act;
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fwq_init();
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fprintf(stderr, "CT29001 INFO start (tid=%d)\n", syscall(__NR_gettid));
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rc = syscall(731, 1, NULL);
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if (rc) {
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fprintf(stderr, "CT29002 INFO uti not supported (rc=%d, errno=%d)\n", rc, errno);
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fflush(stderr);
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}
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rc = pthread_attr_init(&attr);
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if (rc){
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fprintf(stderr, "pthread_attr_init: %d\n", rc);
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exit(1);
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}
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#if 1
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rc = pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
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if (rc){
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fprintf(stderr, "pthread_attr_setdetachstate: %d\n", rc);
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exit(1);
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}
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#endif
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rc = pthread_create(&thr, &attr, util_thread, NULL);
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if (rc){
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fprintf(stderr, "pthread_create: %d\n", rc);
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exit(1);
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}
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fprintf(stderr, "CT29003 pthread_create OK\n");
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fwq(100*1000*1000);
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#if 0
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pthread_join(thr, NULL);
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fprintf(stderr, "CT29004 pthread_join OK\n");
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#endif
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exit(0);
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}
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