65 lines
1.0 KiB
C
65 lines
1.0 KiB
C
/* simple_test.c COPYRIGHT FUJITSU LIMITED 2019 */
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#include "simple_test.h"
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int simple_test(void)
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{
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struct perf_event_attr pe;
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long long count = 0;
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int fd = -1;
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int ret = -1;
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ret = init_perf_event_attr(&pe);
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if (ret < 0) {
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fprintf(stderr,
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"%s : Failed to init_perf_event_attr.\n",
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__func__);
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goto out;
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}
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fd = perf_event_open(&pe, 0, -1, -1, 0);
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if (fd == -1) {
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ret = errno;
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perror("perf_event_open");
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goto out;
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}
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ret = ioctl(fd, PERF_EVENT_IOC_RESET, 0);
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if (ret < 0) {
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perror("ioctl(PERF_EVENT_IOC_RESET)");
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goto out;
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}
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ret = asm_ioctl3(fd, PERF_EVENT_IOC_ENABLE, 0);
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if (ret < 0) {
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perror("asm_ioctl(PERF_EVENT_IOC_ENABLE)");
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goto out;
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}
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nop10;
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nop10;
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nop10;
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nop10;
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nop10;
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nop10;
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nop10;
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nop10;
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ret = asm_ioctl3(fd, PERF_EVENT_IOC_DISABLE, 0);
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if (ret < 0) {
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perror("asm_ioctl(PERF_EVENT_IOC_DISABLE)");
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}
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ret = read(fd, &count, sizeof(long long));
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if (ret < 0) {
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perror("read");
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}
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printf("Used %lld instructions\n", count);
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ret = 0;
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out:
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if (fd != -1) {
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close(fd);
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}
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return ret;
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}
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