From: Peter Zijlstra <peterz@infradead.org>
To: David Ahern <daahern@cisco.com>
Cc: linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
acme@ghostprotocols.net, mingo@elte.hu, fweisbec@gmail.com,
paulus@samba.org, tglx@linutronix.de
Subject: Re: [PATCH 3/6] perf record: add time-of-day option
Date: Tue, 01 Mar 2011 17:00:50 +0100 [thread overview]
Message-ID: <1298995250.5226.882.camel@laptop> (raw)
In-Reply-To: <4D6D13C6.5020807@cisco.com>
On Tue, 2011-03-01 at 08:41 -0700, David Ahern wrote:
> realtime-clock counter is created with a period N. How do you correlate
> perf_clock to time-of-day until now + N?
You scan fwd? Since its at most N time ahead you're scanning fwd its
still constant time.
Thing is, I'm really not convinced this is a very useful ioctl() in
generic, and ioctl()s really need a good justification to add.
next prev parent reply other threads:[~2011-03-01 15:59 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-28 3:52 [PATCH 0/6 v3] perf events: Add realtime clock event, time-of-day strings to script output David Ahern
2011-02-28 3:52 ` [PATCH 1/6] perf events: Introduce realtime clock event David Ahern
2011-02-28 3:52 ` [PATCH 2/6] perf events: plumbing for PERF_SAMPLE_READ and read_format David Ahern
2011-02-28 3:52 ` [PATCH 3/6] perf record: add time-of-day option David Ahern
2011-03-01 14:29 ` Peter Zijlstra
2011-03-01 14:35 ` David Ahern
2011-03-01 15:35 ` Peter Zijlstra
2011-03-01 15:41 ` David Ahern
2011-03-01 16:00 ` Peter Zijlstra [this message]
2011-03-01 16:09 ` David Ahern
2011-03-01 16:37 ` Peter Zijlstra
2011-03-01 16:45 ` David Ahern
2011-03-01 17:07 ` Arnaldo Carvalho de Melo
2011-03-01 17:09 ` Arnaldo Carvalho de Melo
2011-03-01 22:28 ` Peter Zijlstra
2011-03-01 22:35 ` David Ahern
2011-03-02 14:16 ` Thomas Gleixner
2011-03-02 14:28 ` David Ahern
2011-03-02 17:28 ` Thomas Gleixner
2011-03-03 14:29 ` David Ahern
2011-03-03 8:51 ` Ingo Molnar
2011-03-03 14:33 ` David Ahern
2011-02-28 3:52 ` [PATCH 4/6] perf script: dump software events too David Ahern
2011-03-01 14:09 ` Frederic Weisbecker
2011-03-01 14:18 ` David Ahern
2011-03-01 15:11 ` Frederic Weisbecker
2011-03-01 16:11 ` David Ahern
2011-03-01 16:24 ` Frederic Weisbecker
2011-03-01 16:49 ` Arnaldo Carvalho de Melo
2011-02-28 3:52 ` [PATCH 5/6] perf script: Prepend lines with time-of-day string David Ahern
2011-02-28 3:52 ` [PATCH 6/6] perf stat: treat realtime-clock as nsec counter David Ahern
2011-02-28 3:55 ` [PATCH 0/6 v3] perf events: Add realtime clock event, time-of-day strings to script output David Ahern
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