u64 cpu_last_switched[MAX_CPUS];
struct rb_root atom_root, sorted_atom_root;
struct list_head sort_list, cmp_pid;
+ bool force;
};
static u64 get_nsecs(void)
return sum;
}
-static int self_open_counters(void)
+static int self_open_counters(struct perf_sched *sched, unsigned long cur_task)
{
struct perf_event_attr attr;
- char sbuf[STRERR_BUFSIZE];
+ char sbuf[STRERR_BUFSIZE], info[STRERR_BUFSIZE];
int fd;
+ struct rlimit limit;
+ bool need_privilege = false;
memset(&attr, 0, sizeof(attr));
attr.type = PERF_TYPE_SOFTWARE;
attr.config = PERF_COUNT_SW_TASK_CLOCK;
+force_again:
fd = sys_perf_event_open(&attr, 0, -1, -1,
perf_event_open_cloexec_flag());
- if (fd < 0)
+ if (fd < 0) {
+ if (errno == EMFILE) {
+ if (sched->force) {
+ BUG_ON(getrlimit(RLIMIT_NOFILE, &limit) == -1);
+ limit.rlim_cur += sched->nr_tasks - cur_task;
+ if (limit.rlim_cur > limit.rlim_max) {
+ limit.rlim_max = limit.rlim_cur;
+ need_privilege = true;
+ }
+ if (setrlimit(RLIMIT_NOFILE, &limit) == -1) {
+ if (need_privilege && errno == EPERM)
+ strcpy(info, "Need privilege\n");
+ } else
+ goto force_again;
+ } else
+ strcpy(info, "Have a try with -f option\n");
+ }
pr_err("Error: sys_perf_event_open() syscall returned "
- "with %d (%s)\n", fd,
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ "with %d (%s)\n%s", fd,
+ strerror_r(errno, sbuf, sizeof(sbuf)), info);
+ exit(EXIT_FAILURE);
+ }
return fd;
}
BUG_ON(parms == NULL);
parms->task = task = sched->tasks[i];
parms->sched = sched;
- parms->fd = self_open_counters();
+ parms->fd = self_open_counters(sched, i);
sem_init(&task->sleep_sem, 0, 0);
sem_init(&task->ready_for_work, 0, 0);
sem_init(&task->work_done_sem, 0, 0);
cpu_usage_1 = get_cpu_usage_nsec_parent();
if (!sched->runavg_cpu_usage)
sched->runavg_cpu_usage = sched->cpu_usage;
- sched->runavg_cpu_usage = (sched->runavg_cpu_usage * 9 + sched->cpu_usage) / 10;
+ sched->runavg_cpu_usage = (sched->runavg_cpu_usage * (sched->replay_repeat - 1) + sched->cpu_usage) / sched->replay_repeat;
sched->parent_cpu_usage = cpu_usage_1 - cpu_usage_0;
if (!sched->runavg_parent_cpu_usage)
sched->runavg_parent_cpu_usage = sched->parent_cpu_usage;
- sched->runavg_parent_cpu_usage = (sched->runavg_parent_cpu_usage * 9 +
- sched->parent_cpu_usage)/10;
+ sched->runavg_parent_cpu_usage = (sched->runavg_parent_cpu_usage * (sched->replay_repeat - 1) +
+ sched->parent_cpu_usage)/sched->replay_repeat;
ret = pthread_mutex_lock(&sched->start_work_mutex);
BUG_ON(ret);
sched->sum_fluct += fluct;
if (!sched->run_avg)
sched->run_avg = delta;
- sched->run_avg = (sched->run_avg * 9 + delta) / 10;
+ sched->run_avg = (sched->run_avg * (sched->replay_repeat - 1) + delta) / sched->replay_repeat;
printf("#%-3ld: %0.3f, ", sched->nr_runs, (double)delta / 1000000.0);
struct perf_data_file file = {
.path = input_name,
.mode = PERF_DATA_MODE_READ,
+ .force = sched->force,
};
int rc = -1;
"be more verbose (show symbol address, etc)"),
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
"dump raw trace in ASCII"),
+ OPT_BOOLEAN('f', "force", &sched.force, "don't complain, do it"),
OPT_END()
};
const struct option sched_options[] = {