From: "Frank Ch. Eigler" <fche@redhat.com>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: "Kornievskaia, Olga" <Olga.Kornievskaia@netapp.com>,
"linux-perf-users@vger.kernel.org"
<linux-perf-users@vger.kernel.org>
Subject: Re: timing information with perf
Date: Mon, 16 Nov 2015 19:30:20 -0500 [thread overview]
Message-ID: <20151117003020.GD25870@redhat.com> (raw)
In-Reply-To: <20151117001233.GC11993@kernel.org>
Hi -
acme wrote:
> [...]
> > For completeness, a complete systemtap implementation of this could look like:
>
> > # stap -e '
> > global s, t%
> > probe kernel.trace("foobar_enter") {
> > t[tid()]=gettimeofday_us()
> > } [...]
> > '
>
> Is that done syncronously?
Meaning - calculated live as the tracepoints hit? Yes, right during
the respective callbacks. No trace files nor postprocessing.
- FChE
next prev parent reply other threads:[~2015-11-17 0:30 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-12 21:07 timing information with perf Kornievskaia, Olga
2015-11-12 21:57 ` Arnaldo Carvalho de Melo
2015-11-12 22:04 ` Arnaldo Carvalho de Melo
2015-11-12 23:19 ` David Ahern
2015-11-12 23:09 ` Kornievskaia, Olga
2015-11-12 23:22 ` David Ahern
2015-11-12 23:34 ` Arnaldo Carvalho de Melo
2015-11-13 17:01 ` Kornievskaia, Olga
2015-11-13 19:47 ` Arnaldo Carvalho de Melo
2015-11-13 21:57 ` Kornievskaia, Olga
2015-11-16 18:08 ` Frank Ch. Eigler
2015-11-17 0:12 ` Arnaldo Carvalho de Melo
2015-11-17 0:30 ` Frank Ch. Eigler [this message]
2015-11-17 1:31 ` Arnaldo Carvalho de Melo
2015-11-17 3:57 ` David Ahern
2015-11-17 13:31 ` Frank Ch. Eigler
2015-11-17 13:39 ` Arnaldo Carvalho de Melo
2015-11-17 14:04 ` Frank Ch. Eigler
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