linux-kernel - Re: [PATCH v3 1/9] perf evlist: introduce control file descriptors

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Date:   Wed, 20 May 2020 17:46:56 +0300
From:   Alexey Budankov <alexey.budankov@...ux.intel.com>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Arnaldo Carvalho de Melo <acme@...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: Re: [PATCH v3 1/9] perf evlist: introduce control file descriptors


On 20.05.2020 15:38, Jiri Olsa wrote:
> On Wed, May 13, 2020 at 10:59:00AM +0300, Alexey Budankov wrote:
>>
>> Define and initialize control file descriptors.
>>
>> Signed-off-by: Alexey Budankov <alexey.budankov@...ux.intel.com>
>> ---
>>  tools/perf/util/evlist.c | 3 +++
>>  tools/perf/util/evlist.h | 3 +++
>>  2 files changed, 6 insertions(+)
>>
>> diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
>> index 2a9de6491700..aa61619fa304 100644
>> --- a/tools/perf/util/evlist.c
>> +++ b/tools/perf/util/evlist.c
>> @@ -63,6 +63,9 @@ void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus,
>>  	perf_evlist__set_maps(&evlist->core, cpus, threads);
>>  	evlist->workload.pid = -1;
>>  	evlist->bkw_mmap_state = BKW_MMAP_NOTREADY;
>> +	evlist->ctl_fd = -1;
>> +	evlist->ctl_fd_ack = -1;
>> +	evlist->ctl_fd_pos = -1;
>>  }
>>  
>>  struct evlist *evlist__new(void)
>> diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
>> index b6f325dfb4d2..62f259d89b41 100644
>> --- a/tools/perf/util/evlist.h
>> +++ b/tools/perf/util/evlist.h
>> @@ -74,6 +74,9 @@ struct evlist {
>>  		pthread_t		th;
>>  		volatile int		done;
>>  	} thread;
>> +	int		ctl_fd;
>> +	int		ctl_fd_ack;
>> +	int		ctl_fd_pos;
> 
> we are using the anonymous structs to keep related
> parts together like for workload and thread
> 
> could you use it in there as well?

Accepted in v4.

~Alexey

> 
> jirka
> 
>>  };
>>  
>>  struct evsel_str_handler {
>> -- 
>> 2.24.1
>>
>