linux-kernel - Re: [PATCH 6/7] perf record: Add switch-output size option argument

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Date:   Tue, 3 Jan 2017 13:12:11 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     David Ahern <dsahern@...il.com>
Cc:     Jiri Olsa <jolsa@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Wang Nan <wangnan0@...wei.com>,
        lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH 6/7] perf record: Add switch-output size option argument

Em Tue, Jan 03, 2017 at 08:33:35AM -0700, David Ahern escreveu:
> On 1/3/17 1:19 AM, Jiri Olsa wrote:
> > It's now possible to specify the threshold size for
> > perf.data like:
> > 
> >   $ perf record --switch-output=2G ...
> > 
> > Once it's reached, the current data are dumped in to the
> > perf.data.<timestamp> file and session does on.
> 
> How about something like max-file-size instead of switch-output?

Well, I think he wants to use the "switch-output" semantic, which will
go on "slicing" the output into multiple files according to the
specified criteria, be it the existing signal one or a file size.

"max-file-size" looks like a hard limit, no hint about producing
multiple files.

- Arnaldo