37 static int sampling_start(int *pmu_fd, int freq)  in sampling_start()  argument
50 		pmu_fd[i] = sys_perf_event_open(&pe_sample_attr, -1 /* pid */, i,  in sampling_start()
52 		if (pmu_fd[i] < 0) {  in sampling_start()
56 		assert(ioctl(pmu_fd[i], PERF_EVENT_IOC_SET_BPF,  in sampling_start()
58 		assert(ioctl(pmu_fd[i], PERF_EVENT_IOC_ENABLE, 0) == 0);  in sampling_start()
64 static void sampling_end(int *pmu_fd)  in sampling_end()  argument
69 		close(pmu_fd[i]);  in sampling_end()
138 	int *pmu_fd, opt, freq = DEFAULT_FREQ, secs = DEFAULT_SECS;  in main()  local
167 	pmu_fd = malloc(nr_cpus * sizeof(int));  in main()
168 	if (pmu_fd == NULL) {  in main()
190 	if (sampling_start(pmu_fd, freq) != 0)  in main()
193 	sampling_end(pmu_fd);  in main()
194 	free(pmu_fd);  in main()