From: Arjan van de Ven <arjan@linux.intel.com>
To: Thomas Renninger <trenn@suse.de>
Cc: Ingo Molnar <mingo@elte.hu>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
Frank Eigler <fche@redhat.com>,
Steven Rostedt <rostedt@goodmis.org>,
Kevin Hilman <khilman@deeprootsystems.com>,
Peter Zijlstra <peterz@infradead.org>,
linux-omap@vger.kernel.org, rjw@sisk.pl,
linux-pm@lists.linux-foundation.org,
linux-trace-users@vger.kernel.org,
Jean Pihet <jean.pihet@newoldbits.com>,
Pierre Tardy <tardyp@gmail.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Tejun Heo <tj@kernel.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Subject: Re: [PATCH 2/3] PERF(kernel): Cleanup power events
Date: Mon, 25 Oct 2010 07:11:10 -0700 [thread overview]
Message-ID: <4CC58FFE.2050700@linux.intel.com> (raw)
In-Reply-To: <201010251455.17421.trenn@suse.de>
On 10/25/2010 5:55 AM, Thomas Renninger wrote:
>> But the actual code does not actually deal with any 'state 0', does it?
> It does. Not being idle is tracked by cpuidle driver as state 0
> (arch independent):
> /sys/devices/system/cpu/cpu0/cpuidle/state0/
> halt/C1 on X86 is:
> /sys/devices/system/cpu/cpu0/cpuidle/state1/
> ...
state0 is still OS idle!
the API is just weird for this, from a userspace perspective
if the kernel picks this state 0 for the idle handler, the userspace app
gets
two events
one for going to state 0 to enter the idle state
one for going to state 0 to exit idle
but they're the exact same event in your API.
rather unpleasant from a userspace program perspective....
now I need to start tracking even more state on top in powertop to be
able to make a guess at which of the two meanings a state 0 entry has.
next prev parent reply other threads:[~2010-10-25 14:11 UTC|newest]
Thread overview: 157+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1287488171-25303-1-git-send-email-trenn@suse.de>
2010-10-19 11:36 ` [PATCH 1/3] PERF: Do not export power_frequency, but power_start event Thomas Renninger
2010-10-19 11:36 ` Thomas Renninger
2010-10-19 11:36 ` [PATCH 2/3] PERF(kernel): Cleanup power events Thomas Renninger
2010-10-25 6:54 ` Arjan van de Ven
2010-10-25 6:54 ` Arjan van de Ven
2010-10-25 9:41 ` Thomas Renninger
2010-10-25 9:41 ` Thomas Renninger
2010-10-25 13:55 ` Arjan van de Ven
2010-10-25 14:36 ` Thomas Renninger
2010-10-25 14:45 ` Arjan van de Ven
2010-10-25 14:56 ` Ingo Molnar
2010-10-25 15:48 ` Thomas Renninger
2010-10-25 16:00 ` Arjan van de Ven
2010-10-25 23:32 ` Thomas Renninger
2010-10-25 23:32 ` Thomas Renninger
2010-10-25 16:00 ` Arjan van de Ven
2010-10-25 15:48 ` Thomas Renninger
2010-10-25 14:56 ` Ingo Molnar
2010-10-25 14:45 ` Arjan van de Ven
2010-10-25 14:36 ` Thomas Renninger
2010-10-25 13:55 ` Arjan van de Ven
2010-10-25 6:58 ` Arjan van de Ven
2010-10-25 6:58 ` Arjan van de Ven
2010-10-25 10:04 ` Ingo Molnar
2010-10-25 10:04 ` Ingo Molnar
2010-10-25 11:03 ` Thomas Renninger
2010-10-25 11:03 ` Thomas Renninger
2010-10-25 11:55 ` Ingo Molnar
2010-10-25 12:55 ` Thomas Renninger
2010-10-25 12:55 ` Thomas Renninger
2010-10-25 14:11 ` Arjan van de Ven [this message]
2010-10-25 14:51 ` Thomas Renninger
2010-10-25 14:51 ` Thomas Renninger
2010-10-25 14:11 ` Arjan van de Ven
2010-10-25 12:58 ` Mathieu Desnoyers
2010-10-25 12:58 ` Mathieu Desnoyers
2010-10-25 20:29 ` Rafael J. Wysocki
2010-10-25 20:29 ` Rafael J. Wysocki
2010-10-25 11:55 ` Ingo Molnar
2010-10-25 13:58 ` Arjan van de Ven
2010-10-25 20:33 ` Rafael J. Wysocki
2010-10-25 20:33 ` Rafael J. Wysocki
2010-10-25 13:58 ` Arjan van de Ven
2010-10-25 23:33 ` [PATCH] PERF(kernel): Cleanup power events V2 Thomas Renninger
2010-10-26 1:09 ` Arjan van de Ven
2010-10-26 1:09 ` Arjan van de Ven
2010-10-26 7:10 ` Ingo Molnar
2010-10-26 8:08 ` Jean Pihet
2010-10-26 11:21 ` Ingo Molnar
2010-10-26 11:48 ` Thomas Renninger
2010-10-26 11:48 ` Thomas Renninger
2010-10-26 11:54 ` Ingo Molnar
2010-10-26 11:54 ` Ingo Molnar
2010-10-26 13:17 ` Thomas Renninger
2010-10-26 13:17 ` Thomas Renninger
2010-10-26 13:35 ` Thomas Renninger
2010-10-26 13:35 ` Thomas Renninger
2010-10-26 18:57 ` Rafael J. Wysocki
2010-10-26 18:57 ` Rafael J. Wysocki
2010-10-27 0:00 ` Thomas Renninger
2010-10-27 0:00 ` Thomas Renninger
2010-10-27 9:16 ` Rafael J. Wysocki
2010-10-27 9:16 ` Rafael J. Wysocki
2010-10-26 11:21 ` Ingo Molnar
2010-10-26 8:08 ` Jean Pihet
2010-10-26 9:58 ` Arjan van de Ven
2010-10-26 9:58 ` Arjan van de Ven
2010-10-26 10:19 ` Ingo Molnar
2010-10-26 10:19 ` Ingo Molnar
2010-10-26 10:37 ` Thomas Renninger
2010-10-26 10:37 ` Thomas Renninger
2010-10-26 11:19 ` Ingo Molnar
2010-10-26 11:19 ` Ingo Molnar
2010-10-26 19:01 ` Rafael J. Wysocki
2010-10-26 19:01 ` Rafael J. Wysocki
2010-10-26 15:32 ` Pierre Tardy
2010-10-26 15:32 ` Pierre Tardy
2010-10-26 16:04 ` Arjan van de Ven
2010-10-26 16:04 ` Arjan van de Ven
2010-10-26 16:56 ` Pierre Tardy
2010-10-26 17:58 ` Peter Zijlstra
2010-10-26 17:58 ` Peter Zijlstra
2010-10-26 18:14 ` Mathieu Desnoyers
2010-10-26 18:14 ` Mathieu Desnoyers
2010-10-26 18:50 ` Alan Stern
2010-10-26 18:50 ` [linux-pm] " Alan Stern
2010-10-26 21:33 ` Mathieu Desnoyers
2010-10-26 22:20 ` Rafael J. Wysocki
2010-10-26 22:39 ` Rafael J. Wysocki
2010-10-26 22:39 ` Rafael J. Wysocki
2010-10-27 0:46 ` [linux-pm] " Mathieu Desnoyers
2010-10-27 10:22 ` Rafael J. Wysocki
2010-10-27 10:22 ` [linux-pm] " Rafael J. Wysocki
2010-10-27 12:21 ` Mathieu Desnoyers
2010-10-27 12:21 ` [linux-pm] " Mathieu Desnoyers
2010-10-27 14:32 ` Alan Stern
2010-10-27 14:32 ` Alan Stern
2010-10-27 14:32 ` [linux-pm] " Alan Stern
2010-10-28 15:22 ` Alan Stern
2010-10-28 15:22 ` Alan Stern
2010-10-27 21:43 ` [linux-pm] " Rafael J. Wysocki
2010-10-27 21:43 ` Rafael J. Wysocki
2010-10-27 0:46 ` Mathieu Desnoyers
2010-10-26 22:20 ` Rafael J. Wysocki
2010-10-26 21:33 ` Mathieu Desnoyers
2010-10-26 19:04 ` Rafael J. Wysocki
2010-10-26 19:04 ` Rafael J. Wysocki
2010-10-26 21:38 ` Mathieu Desnoyers
2010-10-26 21:38 ` Mathieu Desnoyers
2010-10-26 22:22 ` Rafael J. Wysocki
2010-10-26 22:22 ` Rafael J. Wysocki
2010-10-26 18:15 ` Pierre Tardy
2010-10-26 19:08 ` Rafael J. Wysocki
2010-10-26 20:23 ` Pierre Tardy
2010-10-26 20:38 ` Rafael J. Wysocki
2010-10-26 20:38 ` Rafael J. Wysocki
2010-10-26 20:52 ` Arjan van de Ven
2010-10-26 21:17 ` Rafael J. Wysocki
2010-10-26 21:17 ` Rafael J. Wysocki
2010-10-26 20:52 ` Arjan van de Ven
2010-10-26 20:23 ` Pierre Tardy
2010-10-26 19:08 ` Rafael J. Wysocki
2010-10-26 18:15 ` Pierre Tardy
2010-10-26 16:56 ` Pierre Tardy
2010-10-26 7:10 ` Ingo Molnar
2010-10-26 7:59 ` Jean Pihet
2010-10-26 7:59 ` Jean Pihet
2010-10-26 18:52 ` Rafael J. Wysocki
2010-10-26 18:52 ` Rafael J. Wysocki
2010-10-25 23:33 ` Thomas Renninger
2010-10-19 11:36 ` [PATCH 2/3] PERF(kernel): Cleanup power events Thomas Renninger
2010-10-19 11:36 ` [PATCH 3/3] PERF(userspace): Adjust perf timechart to the new " Thomas Renninger
2010-10-26 0:18 ` [PATCH] PERF(userspace): Adjust perf timechart to the new power events V2 Thomas Renninger
2010-10-26 0:18 ` Thomas Renninger
2010-10-19 11:36 ` [PATCH 3/3] PERF(userspace): Adjust perf timechart to the new power events Thomas Renninger
2010-10-28 9:02 Cleanup and enhance power trace events Thomas Renninger
2010-10-28 9:02 ` [PATCH 2/3] PERF(kernel): Cleanup power events Thomas Renninger
2010-10-28 9:02 ` Thomas Renninger
2010-10-28 11:17 ` Rafael J. Wysocki
2010-10-28 11:17 ` Rafael J. Wysocki
2010-10-28 11:31 ` Rafael J. Wysocki
2010-10-28 11:31 ` [linux-pm] " Rafael J. Wysocki
2010-10-28 11:37 ` Thomas Renninger
2010-10-28 11:37 ` Thomas Renninger
-- strict thread matches above, loose matches on Subject: below --
2010-11-11 18:03 [RESEND] Power trace event cleanup by still providing old interface for some time Thomas Renninger
2010-11-11 18:03 ` [PATCH 2/3] PERF(kernel): Cleanup power events Thomas Renninger
2010-11-12 14:20 ` Jean Pihet
2010-11-12 18:17 ` Thomas Renninger
2010-11-12 21:50 ` Jean Pihet
2010-11-14 13:34 ` Thomas Renninger
2010-11-18 8:01 ` Ingo Molnar
2010-11-18 9:27 ` Thomas Renninger
2010-11-18 9:36 ` Ingo Molnar
2010-11-18 9:44 ` Jean Pihet
2010-11-18 10:52 ` Ingo Molnar
2010-11-18 16:34 ` Jean Pihet
2010-11-19 0:14 ` Thomas Renninger
2010-11-14 13:22 ` Thomas Renninger
2010-11-15 15:49 ` Jean Pihet
2010-11-18 13:01 Power trace event cleanup by still providing old interface for some time Thomas Renninger
2010-11-18 13:01 ` [PATCH 2/3] PERF(kernel): Cleanup power events Thomas Renninger
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