From: Steven Rostedt <rostedt@goodmis.org>
To: Sameer Nanda <snanda@chromium.org>
Cc: Greg KH <gregkh@linuxfoundation.org>,
rob@landley.net, len.brown@intel.com, pavel@ucw.cz, rjw@sisk.pl,
fweisbec@gmail.com, mingo@redhat.com, jkosina@suse.cz,
standby24x7@gmail.com, jj@chaosbits.net,
paulmck@linux.vnet.ibm.com, josh@joshtriplett.org,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-pm@vger.kernel.org
Subject: Re: [PATCH] power, trace: add tracing for device_resume
Date: Fri, 18 May 2012 15:14:52 -0400 [thread overview]
Message-ID: <1337368492.7562.8.camel@gandalf.stny.rr.com> (raw)
In-Reply-To: <CANMivWb3iOnoVtZ8G8kh9-vXPUfNFpSP=QWue0QztbkeZ+uE=Q@mail.gmail.com>
On Fri, 2012-05-18 at 11:57 -0700, Sameer Nanda wrote:
> AFAICT, they are used for something completely different -- help solve
> suspend/resume issues by saving a hash in the RTC of the last device
> that suspended/resumed. They don't use the perf tracing mechanism at
> all.
>
Also note that all tracepoints have timestamps attached to them. You do
not need to add deltas. Do that in the userspace tools that read the
timestamps and events. This way you can have one DECLARE_EVENT_CLASS and
three DEFINE_EVENTs. This will save space.
-- Steve
next prev parent reply other threads:[~2012-05-18 19:14 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-18 18:27 Sameer Nanda
2012-05-18 18:37 ` Greg KH
2012-05-18 18:57 ` Sameer Nanda
2012-05-18 19:14 ` Steven Rostedt [this message]
2012-05-18 20:58 ` Sameer Nanda
2012-05-18 21:19 ` Steven Rostedt
2012-05-18 21:39 ` Sameer Nanda
2012-05-18 21:46 ` Rafael J. Wysocki
2012-05-18 22:17 ` Sameer Nanda
2012-05-18 23:01 ` Greg KH
2012-05-18 23:15 ` Sameer Nanda
2012-05-19 11:59 ` Rafael J. Wysocki
2012-05-19 16:32 ` Greg KH
2012-05-19 19:30 ` Rafael J. Wysocki
2012-05-22 19:18 ` Sameer Nanda
2012-05-19 0:24 ` Steven Rostedt
2012-05-18 21:27 ` Rafael J. Wysocki
2012-05-22 19:16 ` [PATCH] power: add knob for printing device resume times Sameer Nanda
2012-05-22 20:24 ` Greg KH
2012-05-23 16:45 ` [PATCH v2] " Sameer Nanda
2012-06-04 22:41 ` Sameer Nanda
2012-06-05 6:26 ` Greg KH
2012-06-10 11:25 ` Pavel Machek
2012-06-15 0:19 ` Greg KH
2012-06-15 10:00 ` Rafael J. Wysocki
2012-06-15 14:09 ` Greg KH
2012-06-16 13:57 ` Rafael J. Wysocki
2012-06-16 20:36 ` [PATCH] (was: Re: [PATCH v2] power: add knob for printing device resume times) Rafael J. Wysocki
2012-06-18 1:26 ` Greg KH
2012-06-18 5:45 ` Srivatsa S. Bhat
2012-06-28 21:29 ` Sameer Nanda
2012-08-16 14:03 ` [PATCH v2] power: add knob for printing device resume times Pavel Machek
2012-05-24 10:27 ` [PATCH] " Pavel Machek
2012-05-29 17:08 ` Sameer Nanda
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