From: Alexey Budankov <alexey.budankov@linux.intel.com>
To: Jiri Olsa <jolsa@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>, Andi Kleen <ak@linux.intel.com>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v9 09/15] perf stat: factor out event handling loop into dispatch_events()
Date: Mon, 6 Jul 2020 16:07:54 +0300 [thread overview]
Message-ID: <6af18510-0a01-f2a6-bc5c-27ee3283f3ad@linux.intel.com> (raw)
In-Reply-To: <20200706122717.GC3401866@krava>
On 06.07.2020 15:27, Jiri Olsa wrote:
> On Fri, Jul 03, 2020 at 10:46:15AM +0300, Alexey Budankov wrote:
>>
>> 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@linux.intel.com>
>> ---
>> tools/perf/builtin-stat.c | 42 +++++++++++++++++++++++++--------------
>> 1 file changed, 27 insertions(+), 15 deletions(-)
>>
>> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
>> index 3e11f854ffc8..723f1fe27d63 100644
>> --- a/tools/perf/builtin-stat.c
>> +++ b/tools/perf/builtin-stat.c
>> @@ -550,6 +550,30 @@ 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_exited = 0, status = 0;
>> +
>> + while (1) {
>> + if (forks)
>> + child_exited = waitpid(child_pid, &status, WNOHANG);
>> + else
>> + child_exited = !is_target_alive(&target, evsel_list->core.threads) ? 1 : 0;
>> +
>> + if (done || stop || child_exited)
>> + break;
>
> can (done || stop) be in the while condition and
> we'd check just child_exited in here?
>
>> +
>> + nanosleep(ts, NULL);
>> + if (timeout)
>> + stop = true;
>
> can we just break out in here? like the original code?
> I don't think we need the extra iteration
>
>> + else
>> + stop = handle_interval(interval, times);
>
> same here..?
Accepted. In v10.
Alexey
next prev parent reply other threads:[~2020-07-06 13:08 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-03 7:38 [PATCH v9 00/15] perf: support enable and disable commands in stat and record modes Alexey Budankov
2020-07-03 7:41 ` [PATCH v9 01/15] tools/libperf: avoid fds moving by fdarray__filter() Alexey Budankov
2020-07-03 7:41 ` [PATCH v9 02/15] tools/libperf: add properties to struct pollfd *entries objects Alexey Budankov
2020-07-06 12:24 ` Jiri Olsa
2020-07-06 13:05 ` Alexey Budankov
2020-07-03 7:42 ` [PATCH v9 03/15] tools/libperf: don't count nonfilterable fds by fdarray__filter() Alexey Budankov
2020-07-03 7:43 ` [PATCH v9 04/15] perf evlist: introduce control file descriptors Alexey Budankov
2020-07-03 7:43 ` [PATCH v9 05/15] perf evlist: implement control command handling functions Alexey Budankov
2020-07-03 7:44 ` [PATCH v9 06/15] perf stat: factor out body of event handling loop for system wide Alexey Budankov
2020-07-03 7:45 ` [PATCH v9 07/15] perf stat: move target check to loop control statement Alexey Budankov
2020-07-03 7:45 ` [PATCH v9 08/15] perf stat: factor out body of event handling loop for fork case Alexey Budankov
2020-07-03 7:46 ` [PATCH v9 09/15] perf stat: factor out event handling loop into dispatch_events() Alexey Budankov
2020-07-06 12:27 ` Jiri Olsa
2020-07-06 13:07 ` Alexey Budankov [this message]
2020-07-03 7:46 ` [PATCH v9 10/15] perf stat: extend -D,--delay option with -1 value Alexey Budankov
2020-07-03 7:47 ` [PATCH v9 11/15] perf stat: implement control commands handling Alexey Budankov
2020-07-06 12:34 ` Jiri Olsa
2020-07-06 14:47 ` Alexey Budankov
2020-07-06 19:34 ` Jiri Olsa
2020-07-07 13:07 ` Alexey Budankov
2020-07-07 13:14 ` Jiri Olsa
2020-07-07 13:24 ` Alexey Budankov
2020-07-07 14:23 ` Jiri Olsa
2020-07-07 14:55 ` Alexey Budankov
2020-07-07 16:05 ` Jiri Olsa
2020-07-07 16:43 ` Alexey Budankov
2020-07-07 17:19 ` Alexey Budankov
2020-07-06 12:37 ` Jiri Olsa
2020-07-06 13:10 ` Alexey Budankov
2020-07-03 7:47 ` [PATCH v9 12/15] perf stat: introduce --control fd:ctl-fd[,ack-fd] options Alexey Budankov
2020-07-03 7:48 ` [PATCH v9 13/15] perf record: extend -D,--delay option with -1 value Alexey Budankov
2020-07-03 7:49 ` [PATCH v9 14/15] perf record: implement control commands handling Alexey Budankov
2020-07-03 7:49 ` [PATCH v9 15/15] perf record: introduce --control fd:ctl-fd[,ack-fd] options Alexey Budankov
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