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From: Steven Rostedt <rostedt@goodmis.org>
To: Jason Behmer <jbehmer@google.com>
Cc: tom.zanussi@linux.intel.com, linux-kernel@vger.kernel.org
Subject: Re: Nested events with zero deltas, can use absolute timestamps instead?
Date: Fri, 24 May 2019 11:24:57 -0400	[thread overview]
Message-ID: <20190524112457.58b24d89@gandalf.local.home> (raw)
In-Reply-To: <CAMmhGq+1gZvzR9RwJ6m1MzO1jnTy8yFx8jaRiWpGtZ=E6n9vig@mail.gmail.com>

On Fri, 24 May 2019 08:11:12 -0700
Jason Behmer <jbehmer@google.com> wrote:

> > > What do you think of that?  
> >
> > I don't think that's confusing if its well documented. Have the user
> > flag called "force_absolute_timestamps", that way it's not something
> > that the user will think that we wont have absolute timestamps if it is
> > zero. Have the documentation say:
> >
> >  Various utilities within the tracing system require that the ring
> >  buffer uses absolute timestamps. But you may force the ring buffer to
> >  always use it, which will give you unique timings with nested tracing
> >  at the cost of more usage in the ring buffer.
> >
> > -- Steve  
> 
> Ah, I was thinking of doing this within the existing timestamp_mode
> config file.  Having a separate file does make it much less confusing.

Not a separate file, but a new tracing option.

-- Steve

  reply	other threads:[~2019-05-24 15:25 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CAMmhGqKc27W03roONYXhmwB0dtz5Z8nGoS2MLSsKJ3Zotv5-JA@mail.gmail.com>
2019-03-29 16:52 ` Steven Rostedt
2019-04-01 22:54   ` Jason Behmer
2019-04-02  2:20     ` Steven Rostedt
2019-04-02  4:42       ` Jason Behmer
2019-05-24 14:17         ` Jason Behmer
2019-05-24 15:00           ` Steven Rostedt
2019-05-24 15:11             ` Jason Behmer
2019-05-24 15:24               ` Steven Rostedt [this message]
2019-05-24 15:48                 ` Jason Behmer
2019-05-24 15:54                   ` Steven Rostedt
2019-05-24 15:58                     ` Steven Rostedt

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