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From: Jiri Olsa <>
To: Steven Rostedt <>
Cc: Ian Rogers <>,
	Peter Zijlstra <>,
	Ingo Molnar <>,
	Arnaldo Carvalho de Melo <>,
	Mark Rutland <>,
	Alexander Shishkin <>,
	Namhyung Kim <>,,,,
	Tzvetomir Stoyanov <>,, Michael Petlan <>
Subject: Re: [RFC PATCH] libtraceevent: Increase libtraceevent logging when verbose
Date: Thu, 10 Jun 2021 21:08:32 +0200	[thread overview]
Message-ID: <YMJjMPDKo2IdCC6G@krava> (raw)
In-Reply-To: <20210610103927.44462e35@oasis.local.home>

On Thu, Jun 10, 2021 at 10:39:27AM -0400, Steven Rostedt wrote:
> On Wed,  9 Jun 2021 23:06:43 -0700
> Ian Rogers <> wrote:
> > libtraceevent has added more levels of debug printout and with changes
> > like:
> >
> > previously generated output like "registering plugin" is no longer
> > displayed. This change makes it so that if perf's verbose debug output
> > is enabled then the debug and info libtraceevent messages can be
> > displayed.
> > As this API isn't present in the deprecated tools version of
> > libtracevent I'm uploading this as an RFC.
> Thanks Ian,
> We need to start porting perf to using the upstream libtraceevent
> library. I think the best way to do that is what we did with trace-cmd.
> That is to have the make files check if the minimum version of
> libtraceevent is installed, and if so, use that instead of the local
> version. If it is not installed, produce a message encouraging the
> developer to install the upstream libtraceevent and warn that it will
> be using a deprecated older versino, then build the deprecated local
> version. After some time, we could simply remove it and make it a
> dependency, but I want to do that when all the main distros being used
> have it.

Michael did the libtraceevent detection and dynamic linking support:

I think we should have that in Fedora/RHEL rpms already, or it's on the way.

The detection code could be change to contain things we need.


> Currently its in the latest Debian, Ubuntu, and Fedora. I also believe
> its in SUSE but have not checked. It's in Fedora 34, but it doesn't
> appear to be in Fedora 33. As that's not too old, I don't think we
> should make it a dependency as of yet.
> -- Steve

  parent reply	other threads:[~2021-06-10 19:08 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-10  6:06 [RFC PATCH] libtraceevent: Increase libtraceevent logging when verbose Ian Rogers
2021-06-10 14:39 ` Steven Rostedt
2021-06-10 18:50   ` Ian Rogers
2021-06-10 19:32     ` Steven Rostedt
2021-06-10 19:08   ` Jiri Olsa [this message]
2021-06-10 19:47     ` Steven Rostedt
2021-06-10 19:59     ` Steven Rostedt
2021-06-10 20:47       ` Jiri Olsa

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