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-top.c b/tools/perf/builtin-top.c
index 0e42666..1e67ab9 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -68,8 +68,7 @@
static int target_pid = -1;
static int target_tid = -1;
-static pid_t *all_tids = NULL;
-static int thread_num = 0;
+static struct thread_map *threads;
static bool inherit = false;
static struct cpu_map *cpus;
static int realtime_prio = 0;
@@ -1200,7 +1199,7 @@
for (i = 0; i < cpus->nr; i++) {
list_for_each_entry(counter, &evsel_list, node) {
for (thread_index = 0;
- thread_index < thread_num;
+ thread_index < threads->nr;
thread_index++) {
perf_session__mmap_read_counter(self,
counter, i, thread_index);
@@ -1236,10 +1235,10 @@
attr->inherit = (cpu < 0) && inherit;
attr->mmap = 1;
- for (thread_index = 0; thread_index < thread_num; thread_index++) {
+ for (thread_index = 0; thread_index < threads->nr; thread_index++) {
try_again:
FD(evsel, i, thread_index) = sys_perf_event_open(attr,
- all_tids[thread_index], cpu, group_fd, 0);
+ threads->map[thread_index], cpu, group_fd, 0);
if (FD(evsel, i, thread_index) < 0) {
int err = errno;
@@ -1410,25 +1409,17 @@
if (argc)
usage_with_options(top_usage, options);
- 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(top_usage, options);
- }
- } else {
- all_tids=malloc(sizeof(pid_t));
- if (!all_tids)
- return -ENOMEM;
- 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(top_usage, options);
}
- 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)
return -ENOMEM;
@@ -1468,8 +1459,8 @@
usage_with_options(top_usage, options);
list_for_each_entry(pos, &evsel_list, node) {
- if (perf_evsel__alloc_mmap_per_thread(pos, cpus->nr, thread_num) < 0 ||
- perf_evsel__alloc_fd(pos, cpus->nr, thread_num) < 0)
+ if (perf_evsel__alloc_mmap_per_thread(pos, cpus->nr, threads->nr) < 0 ||
+ perf_evsel__alloc_fd(pos, cpus->nr, threads->nr) < 0)
goto out_free_fd;
/*
* Fill in the ones not specifically initialized via -c: