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perf top tui: Wait till the first sample to refresh the screen.

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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>
This commit is contained in:
Arnaldo Carvalho de Melo 2011-03-01 10:43:03 -03:00
parent 374cfe5689
commit 5807806a92
2 changed files with 20 additions and 2 deletions
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21
tools/perf/builtin-top.c
View file

@ -72,6 +72,7 @@ static struct perf_top top = {
.target_tid = -1,
.active_symbols = LIST_HEAD_INIT(top.active_symbols),
.active_symbols_lock = PTHREAD_MUTEX_INITIALIZER,
.active_symbols_cond = PTHREAD_COND_INITIALIZER,
.freq = 1000, /* 1 KHz */
};
@ -577,7 +578,17 @@ static void handle_keypress(struct perf_session *session, int c)
static void *display_thread_tui(void *arg __used)
{
perf_top__tui_browser(&top);
int err = 0;
pthread_mutex_lock(&top.active_symbols_lock);
while (list_empty(&top.active_symbols)) {
err = pthread_cond_wait(&top.active_symbols_cond,
&top.active_symbols_lock);
if (err)
break;
}
pthread_mutex_unlock(&top.active_symbols_lock);
if (!err)
perf_top__tui_browser(&top);
exit_browser(0);
exit(0);
return NULL;
@ -776,8 +787,14 @@ static void perf_event__process_sample(const union perf_event *event,
syme->count[evsel->idx]++;
record_precise_ip(syme, evsel->idx, ip);
pthread_mutex_lock(&top.active_symbols_lock);
if (list_empty(&syme->node) || !syme->node.next)
if (list_empty(&syme->node) || !syme->node.next) {
static bool first = true;
__list_insert_active_sym(syme);
if (first) {
pthread_cond_broadcast(&top.active_symbols_cond);
first = false;
}
}
pthread_mutex_unlock(&top.active_symbols_lock);
}
}

1
tools/perf/util/top.h
View file

@ -35,6 +35,7 @@ struct perf_top {
*/
struct list_head active_symbols;
pthread_mutex_t active_symbols_lock;
pthread_cond_t active_symbols_cond;
u64 samples;
u64 kernel_samples, us_samples;
u64 exact_samples;