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Message-ID: <4d90938c-429a-586c-0cc7-767f804c6bce@linux.intel.com>
Date: Wed, 17 Jun 2020 11:40:03 +0300
From: Alexey Budankov <alexey.budankov@...ux.intel.com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...nel.org>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Andi Kleen <ak@...ux.intel.com>,
linux-kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH v8 07/13] perf stat: factor out event handling loop into
dispatch_events()
Consolidate event dispatching loops for fork, attach and system
wide monitoring use cases into common dispatch_events() function.
Signed-off-by: Alexey Budankov <alexey.budankov@...ux.intel.com>
---
tools/perf/builtin-stat.c | 35 ++++++++++++++++++++++++-----------
1 file changed, 24 insertions(+), 11 deletions(-)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 3bc538576607..39749c290508 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -557,6 +557,27 @@ static bool is_target_alive(struct target *_target,
return false;
}
+static int dispatch_events(bool forks, int timeout, int interval, int *times, struct timespec *ts)
+{
+ bool stop = false;
+ int child = 0, status = 0;
+
+ while (1) {
+ if (forks)
+ child = waitpid(child_pid, &status, WNOHANG);
+ else
+ child = !is_target_alive(&target, evsel_list->core.threads) ? 1 : 0;
+
+ if (done || stop || child)
+ break;
+
+ nanosleep(ts, NULL);
+ stop = process_timeout(timeout, interval, times);
+ }
+
+ return status;
+}
+
enum counter_recovery {
COUNTER_SKIP,
COUNTER_RETRY,
@@ -628,7 +649,6 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx)
struct affinity affinity;
int i, cpu;
bool second_pass = false;
- bool stop = false;
if (interval) {
ts.tv_sec = interval / USEC_PER_MSEC;
@@ -797,12 +817,8 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx)
perf_evlist__start_workload(evsel_list);
enable_counters();
- if (interval || timeout) {
- while (!stop && !waitpid(child_pid, &status, WNOHANG)) {
- nanosleep(&ts, NULL);
- stop = process_timeout(timeout, interval, ×);
- }
- }
+ if (interval || timeout)
+ status = dispatch_events(forks, timeout, interval, ×, &ts);
if (child_pid != -1) {
if (timeout)
kill(child_pid, SIGTERM);
@@ -819,10 +835,7 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx)
psignal(WTERMSIG(status), argv[0]);
} else {
enable_counters();
- while (!done && !stop && is_target_alive(&target, evsel_list->core.threads)) {
- nanosleep(&ts, NULL);
- stop = process_timeout(timeout, interval, ×);
- }
+ dispatch_events(forks, timeout, interval, ×, &ts);
}
disable_counters();
--
2.24.1
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