perf tools: Refactor all_tids to hold nr and the map
So that later, we can pass the thread_map instance instead of
(thread_num, thread_map) for things like perf_evsel__open and friends,
just like was done with cpu_map.
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 220e6e7..7bc0490 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -54,8 +54,7 @@
static bool system_wide = false;
static pid_t target_pid = -1;
static pid_t target_tid = -1;
-static pid_t *all_tids = NULL;
-static int thread_num = 0;
+static struct thread_map *threads;
static pid_t child_pid = -1;
static bool no_inherit = false;
static enum write_mode_t write_mode = WRITE_FORCE;
@@ -318,9 +317,9 @@
retry_sample_id:
attr->sample_id_all = sample_id_all_avail ? 1 : 0;
- for (thread_index = 0; thread_index < thread_num; thread_index++) {
+ for (thread_index = 0; thread_index < threads->nr; thread_index++) {
try_again:
- FD(evsel, nr_cpu, thread_index) = sys_perf_event_open(attr, all_tids[thread_index], cpu, group_fd, 0);
+ FD(evsel, nr_cpu, thread_index) = sys_perf_event_open(attr, threads->map[thread_index], cpu, group_fd, 0);
if (FD(evsel, nr_cpu, thread_index) < 0) {
int err = errno;
@@ -653,7 +652,7 @@
}
if (!system_wide && target_tid == -1 && target_pid == -1)
- all_tids[0] = child_pid;
+ threads->map[0] = child_pid;
close(child_ready_pipe[1]);
close(go_pipe[0]);
@@ -793,7 +792,7 @@
list_for_each_entry(pos, &evsel_list, node) {
for (thread = 0;
- thread < thread_num;
+ thread < threads->nr;
thread++)
ioctl(FD(pos, i, thread),
PERF_EVENT_IOC_DISABLE);
@@ -910,21 +909,13 @@
goto out_symbol_exit;
}
- if (target_pid != -1) {
+ if (target_pid != -1)
target_tid = target_pid;
- thread_num = find_all_tid(target_pid, &all_tids);
- if (thread_num <= 0) {
- fprintf(stderr, "Can't find all threads of pid %d\n",
- target_pid);
- usage_with_options(record_usage, record_options);
- }
- } else {
- all_tids=malloc(sizeof(pid_t));
- if (!all_tids)
- goto out_symbol_exit;
- all_tids[0] = target_tid;
- thread_num = 1;
+ threads = thread_map__new(target_pid, target_tid);
+ if (threads == NULL) {
+ pr_err("Problems finding threads of monitor\n");
+ usage_with_options(record_usage, record_options);
}
cpus = cpu_map__new(cpu_list);
@@ -934,11 +925,11 @@
}
list_for_each_entry(pos, &evsel_list, node) {
- if (perf_evsel__alloc_fd(pos, cpus->nr, thread_num) < 0)
+ if (perf_evsel__alloc_fd(pos, cpus->nr, threads->nr) < 0)
goto out_free_fd;
}
- event_array = malloc(
- sizeof(struct pollfd)*MAX_NR_CPUS*MAX_COUNTERS*thread_num);
+ event_array = malloc((sizeof(struct pollfd) * MAX_NR_CPUS *
+ MAX_COUNTERS * threads->nr));
if (!event_array)
goto out_free_fd;
@@ -965,8 +956,8 @@
out_free_event_array:
free(event_array);
out_free_fd:
- free(all_tids);
- all_tids = NULL;
+ thread_map__delete(threads);
+ threads = NULL;
out_symbol_exit:
symbol__exit();
return err;