From: Alexey Budankov <alexey.budankov@linux.intel.com>
To: Jiri Olsa <jolsa@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>,
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 v1 4/8] perf stat: implement resume and pause control commands handling
Date: Thu, 2 Apr 2020 18:06:47 +0300 [thread overview]
Message-ID: <6853c0bd-3659-12ce-dfc3-b2d8c655a0d4@linux.intel.com> (raw)
In-Reply-To: <20200402141740.GO2518490@krava>
On 02.04.2020 17:17, Jiri Olsa wrote:
> On Fri, Mar 27, 2020 at 11:48:31AM +0300, Alexey Budankov wrote:
>
> SNIP
>
>>
>> - if (interval) {
>> - ts.tv_sec = interval / USEC_PER_MSEC;
>> - ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC;
>> - } else if (timeout) {
>> - ts.tv_sec = timeout / USEC_PER_MSEC;
>> - ts.tv_nsec = (timeout % USEC_PER_MSEC) * NSEC_PER_MSEC;
>> - } else {
>> - ts.tv_sec = 1;
>> - ts.tv_nsec = 0;
>> - }
>> -
>> if (forks) {
>> if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe,
>> workload_exec_failed_signal) < 0) {
>> @@ -688,18 +745,10 @@ 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 (!waitpid(child_pid, &status, WNOHANG)) {
>> - nanosleep(&ts, NULL);
>> - if (timeout)
>> - break;
>> - process_interval();
>> - if (interval_count && !(--times))
>> - break;
>> - }
>> - }
>> - if (child_pid != -1)
>> + if (stat_config.ctl_fd == -1 && !interval && !timeout)
>> wait4(child_pid, &status, 0, &stat_config.ru_data);
>> + else
>> + status = handle_events(child_pid, &stat_config);
>>
>> if (workload_exec_errno) {
>> const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
>> @@ -711,18 +760,7 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx)
>> psignal(WTERMSIG(status), argv[0]);
>> } else {
>> enable_counters();
>> - while (!done) {
>> - nanosleep(&ts, NULL);
>> - if (!is_target_alive(&target, evsel_list->core.threads))
>> - break;
>> - if (timeout)
>> - break;
>> - if (interval) {
>> - process_interval();
>> - if (interval_count && !(--times))
>> - break;
>> - }
>> - }
>
> could you please separate the change to have:
> - factor out the above too loops to the new function
> - adding control fds handling to that function
>
> so it's more obvious we don't break anything
Accepted.
~Alexey
next prev parent reply other threads:[~2020-04-02 15:06 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-27 8:34 [PATCH v1 0/8] perf: support resume and pause commands in stat and record modes Alexey Budankov
2020-03-27 8:45 ` [PATCH v1 1/8] perf evlist: introduce control file descriptors Alexey Budankov
2020-03-27 8:46 ` [PATCH v1 2/8] perf evlist: implement control command handling functions Alexey Budankov
2020-04-02 14:17 ` Jiri Olsa
2020-04-02 15:20 ` Alexey Budankov
2020-03-27 8:47 ` [PATCH v1 3/8] perf stat: introduce control descriptors and --ctl-fd[-ack] options Alexey Budankov
2020-04-02 14:17 ` Jiri Olsa
2020-04-02 15:05 ` Alexey Budankov
2020-03-27 8:48 ` [PATCH v1 4/8] perf stat: implement resume and pause control commands handling Alexey Budankov
2020-04-02 14:17 ` Jiri Olsa
2020-04-02 15:06 ` Alexey Budankov [this message]
2020-03-27 8:49 ` [PATCH v1 5/8] perf docs: extend stat mode docs with info on --ctl-fd[-ack] options Alexey Budankov
2020-03-27 8:49 ` [PATCH v1 6/8] perf record: introduce control descriptors and " Alexey Budankov
2020-03-27 8:50 ` [PATCH v1 7/8] perf record: implement resume and pause control commands handling Alexey Budankov
2020-03-27 8:51 ` [PATCH v1 8/8] perf docs: extend record mode docs with info on --ctl-fd[-ack] options Alexey Budankov
2020-04-01 14:01 ` [PATCH v1 0/8] perf: support resume and pause commands in stat and record modes Jiri Olsa
2020-04-01 16:07 ` Alexey Budankov
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