int
perf_setup_list_events(const char *ev, perf_event_desc_t **fd, int *num_fds)
{
const char **argv;
char *p, *q, *events;
int i, ret, num = 0;
if (!(ev && fd && num_fds))
return -1;
events = strdup(ev);
if (!events)
return -1;
q = events;
while((p = strchr(q, ','))) {
num++;
q = p + 1;
}
num++;
num++; /* terminator */
argv = malloc(num * sizeof(char *));
if (!argv) {
free(events);
return -1;
}
i = 0; q = events;
while((p = strchr(q, ','))) {
*p = '\0';
argv[i++] = q;
q = p + 1;
}
argv[i++] = q;
argv[i] = NULL;
ret = perf_setup_argv_events(argv, fd, num_fds);
free(argv);
free(events); /* strdup in perf_setup_argv_events() */
return ret;
}
int pfm_init_counters(const char** counters) {
#ifdef VERBOSE
fprintf(stderr, "Initing counters\n");
#endif
/* Initialize pfm library */
int i,ret;
ret = pfm_initialize();
if (ret != PFM_SUCCESS) {
fprintf(stderr, "Cannot initialize libpfm: %s\n", pfm_strerror(ret));
return -1;
}
ret = perf_setup_argv_events(counters, &fds, &num_fds);
if (ret || !num_fds) {
fprintf(stderr, "Cannot setup events\n");
return -1;
}
fds[0].fd = -1;
for (i=0; i < num_fds; i++) {
/* request timing information necessary for scaling */
fds[i].hw.read_format = PERF_FORMAT_SCALE;
fds[i].hw.disabled = 1; /* start paused */
fds[i].fd = perf_event_open(&fds[i].hw, 0, -1, -1, 0);
if (fds[i].fd == -1) {
fprintf(stderr, "Cannot open event %d\n", i);
return -1;
}
}
counter_values = (uint64_t*) malloc(num_fds * sizeof(uint64_t));
return 0;
}
