From: Thomas Renninger <trenn@suse.de>
To: Jean Pihet <jean.pihet@newoldbits.com>
Cc: discuss@lesswatts.org, linux-pm@lists.linux-foundation.org,
Ingo Molnar <mingo@elte.hu>,
Arjan van de Ven <arjan@linux.intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Len Brown <len.brown@intel.com>,
arjan@infradead.org, Kevin Hilman <khilman@deeprootsystems.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] tracing, perf: add more power related events
Date: Mon, 6 Sep 2010 14:00:05 +0200 [thread overview]
Message-ID: <201009061400.05637.trenn@suse.de> (raw)
In-Reply-To: <AANLkTik8_ixOcFy=c4hPZknyUqPYB+2hzQTNK9wVok4q@mail.gmail.com>
On Monday 06 September 2010 13:27:13 Jean Pihet wrote:
> On Mon, Sep 6, 2010 at 12:42 PM, Thomas Renninger <trenn@suse.de> wrote:
...
> In order to reach an efficient low power mode you
> need to ensure that all clocks in a clock domain are idled or cut off
> (automatically by the HW or with the intervention of SW drivers).
>
> The HW complexity requires the tracing of all those clocks/power
> states, that is why new events are proposed.
Hm, but if the HW can switch clocks behind your back, how do you
realize that to throw a perf clock power event then?
Theoretically you need to poll to keep track of HW switching the
clocks?
Thomas
next prev parent reply other threads:[~2010-09-06 12:00 UTC|newest]
Thread overview: 121+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-16 11:09 [PATCH] tracing, perf: add more power related events Jean Pihet
2010-08-16 11:15 ` Peter Zijlstra
2010-08-16 11:25 ` Jean Pihet
2010-08-23 10:25 ` Jean Pihet
2010-09-03 17:00 ` Jean Pihet
2010-09-03 18:05 ` Thomas Renninger
2010-09-03 19:55 ` Ingo Molnar
2010-09-03 20:10 ` Thomas Renninger
2010-09-03 20:28 ` Ingo Molnar
2010-09-03 22:56 ` Arjan van de Ven
2010-09-04 8:18 ` Ingo Molnar
2010-09-06 8:56 ` Jean Pihet
2010-09-06 10:42 ` Thomas Renninger
2010-09-06 11:27 ` Jean Pihet
2010-09-06 12:00 ` Thomas Renninger [this message]
2010-09-07 7:28 ` Jean Pihet
2010-09-07 7:28 ` Jean Pihet
2010-09-06 12:00 ` Thomas Renninger
2010-09-06 11:27 ` Jean Pihet
2010-09-06 10:42 ` Thomas Renninger
-- strict thread matches above, loose matches on Subject: below --
2010-09-07 7:21 Jean Pihet
2010-09-07 7:21 Jean Pihet
2010-09-07 7:21 ` Jean Pihet
2010-09-07 8:01 ` Jean Pihet
2010-09-07 8:01 ` Jean Pihet
2010-09-07 8:01 ` Jean Pihet
2010-09-08 6:53 ` Ingo Molnar
2010-09-08 6:53 ` Ingo Molnar
2010-09-09 7:15 ` Jean Pihet
2010-09-09 7:54 ` Ingo Molnar
2010-09-09 7:54 ` Ingo Molnar
2010-09-15 15:45 ` Jean Pihet
2010-09-15 15:45 ` Jean Pihet
2010-09-15 15:45 ` Jean Pihet
2010-09-17 13:08 ` Thomas Renninger
2010-09-17 13:08 ` Thomas Renninger
2010-09-17 14:05 ` Jean Pihet
2010-09-17 14:05 ` Jean Pihet
2010-09-17 14:24 ` Ingo Molnar
2010-09-17 14:24 ` Ingo Molnar
2010-09-17 15:36 ` Thomas Renninger
2010-09-17 16:24 ` Ingo Molnar
2010-09-17 22:26 ` Thomas Renninger
2010-09-17 22:26 ` Thomas Renninger
2010-09-22 15:31 ` Jean Pihet
2010-09-22 15:31 ` Jean Pihet
2010-09-22 15:31 ` Jean Pihet
2010-09-22 15:33 ` Arjan van de Ven
2010-09-22 15:36 ` Jean Pihet
2010-09-22 15:36 ` Jean Pihet
2010-09-22 16:32 ` Arjan van de Ven
2010-09-22 16:43 ` Peter Zijlstra
2010-09-22 17:06 ` Arjan van de Ven
2010-09-22 17:30 ` Peter Zijlstra
2010-09-22 18:15 ` Steven Rostedt
2010-09-22 18:23 ` Ingo Molnar
2010-09-22 18:30 ` Peter Zijlstra
2010-09-22 18:30 ` Peter Zijlstra
2010-09-22 18:23 ` Ingo Molnar
2010-09-22 18:26 ` Peter Zijlstra
2010-09-22 18:36 ` Steven Rostedt
2010-09-22 18:43 ` Peter Zijlstra
2010-09-22 18:43 ` Peter Zijlstra
2010-09-22 18:36 ` Steven Rostedt
2010-09-22 19:14 ` Frank Ch. Eigler
2010-09-22 19:14 ` Frank Ch. Eigler
2010-09-22 18:26 ` Peter Zijlstra
2010-09-22 18:15 ` Steven Rostedt
2010-09-22 17:30 ` Peter Zijlstra
2010-09-22 17:36 ` Thomas Renninger
2010-09-22 17:36 ` Thomas Renninger
2010-09-22 17:06 ` Arjan van de Ven
2010-09-22 16:43 ` Peter Zijlstra
2010-09-22 16:47 ` Peter Zijlstra
2010-09-22 16:47 ` Peter Zijlstra
2010-09-22 16:32 ` Arjan van de Ven
2010-09-22 15:36 ` Jean Pihet
2010-09-22 17:57 ` Thomas Renninger
2010-09-22 17:57 ` Thomas Renninger
2010-09-22 18:13 ` Arjan van de Ven
2010-09-22 18:34 ` Thomas Renninger
2010-09-22 18:34 ` Thomas Renninger
2010-09-22 18:13 ` Arjan van de Ven
2010-09-22 18:09 ` Rafael J. Wysocki
2010-09-22 18:09 ` Rafael J. Wysocki
2010-09-22 15:33 ` Arjan van de Ven
2010-09-22 18:49 ` Rafael J. Wysocki
2010-09-28 8:35 ` Jean Pihet
2010-09-28 8:35 ` Jean Pihet
2010-09-28 8:35 ` Jean Pihet
2010-09-28 21:22 ` Rafael J. Wysocki
2010-09-28 21:43 ` Jean Pihet
2010-09-28 21:43 ` Jean Pihet
2010-09-28 22:05 ` Rafael J. Wysocki
2010-09-28 22:05 ` Rafael J. Wysocki
2010-09-28 21:43 ` Jean Pihet
2010-09-28 21:45 ` Arjan van de Ven
2010-09-28 22:05 ` Rafael J. Wysocki
2010-09-28 22:05 ` Rafael J. Wysocki
2010-09-29 7:49 ` Thomas Renninger
2010-09-29 7:49 ` Thomas Renninger
2010-09-29 9:25 ` Jean Pihet
2010-09-29 9:25 ` Jean Pihet
2010-09-29 9:25 ` Jean Pihet
2010-10-04 17:55 ` Pavel Machek
2010-09-28 21:45 ` Arjan van de Ven
2010-09-28 21:22 ` Rafael J. Wysocki
2010-09-22 18:49 ` Rafael J. Wysocki
2010-09-17 16:24 ` Ingo Molnar
2010-09-17 15:36 ` Thomas Renninger
2010-09-17 15:29 ` Thomas Renninger
2010-09-17 15:29 ` Thomas Renninger
2010-09-17 21:58 ` Thomas Renninger
2010-09-17 21:58 ` Thomas Renninger
2010-09-17 22:04 ` Thomas Renninger
2010-09-17 22:04 ` Thomas Renninger
2010-09-17 22:10 ` Thomas Renninger
2010-09-17 22:10 ` Thomas Renninger
2010-09-17 22:17 ` Thomas Renninger
2010-09-17 22:17 ` Thomas Renninger
2010-09-09 7:15 ` Jean Pihet
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