linux-kernel - Re: [PATCH v11 2/3]: perf record: enable asynchronous trace writing

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Message-ID: <cf901e1e-781f-4e1c-439f-26d09691e0fd@linux.intel.com>
Date:   Mon, 8 Oct 2018 15:19:56 +0300
From:   Alexey Budankov <alexey.budankov@...ux.intel.com>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v11 2/3]: perf record: enable asynchronous trace writing

Hi,

On 08.10.2018 13:51, Jiri Olsa wrote:
> On Mon, Oct 08, 2018 at 09:17:11AM +0300, Alexey Budankov wrote:
> 
> SNIP
> 
>>  struct option;
>> diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
>> index db8f16f8a363..ecaa5b5eb3ed 100644
>> --- a/tools/perf/util/mmap.c
>> +++ b/tools/perf/util/mmap.c
>> @@ -367,6 +367,82 @@ int perf_mmap__push(struct perf_mmap *md, void *to,
>>  	return rc;
>>  }
>>  
>> +#ifdef HAVE_AIO_SUPPORT
>> +int perf_mmap__aio_push(struct perf_mmap *md, void *to,
>> +			int push(void *to, struct aiocb *cblock, void *buf, size_t size, off_t off),
>> +			off_t *off)
>> +{
> 
> seems like this could be defined static within builtin-record object,
> is there a reason why it's in here?

The reason is analogy with perf_mmap__push() above.

Thanks,
Alexey
 
> 
> thanks,
> jirka
>