From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: Mark Langsdorf <mark.langsdorf@calxeda.com>
Cc: Borislav Petkov <bp@alien8.de>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"cpufreq@vger.kernel.org" <cpufreq@vger.kernel.org>,
"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
MyungJoo Ham <myungjoo.ham@gmail.com>
Subject: Re: [PATCH 3/6 v4] cpufreq: tolerate inexact values when collecting stats
Date: Sat, 24 Nov 2012 11:05:09 +0100 [thread overview]
Message-ID: <3756540.1nyvqzWibd@vostro.rjw.lan> (raw)
In-Reply-To: <20121117145048.GI16441@x1.osrc.amd.com>
On Saturday, November 17, 2012 03:50:48 PM Borislav Petkov wrote:
> On Tue, Nov 13, 2012 at 02:13:38PM -0500, Mark Langsdorf wrote:
> > Although cpufreq_driver has a flag field, no part of cpufreq_driver
> > is directly passed to the cpufreq_stat code. Only cpufreq_policy
> > is. It's cleaner to do passes of the while loop than to copy the
> > cpufreq_driver.flag field into cpufreq_policy and then store it again
> > in cpufreq_stats.
>
> That maybe so but this newly added loop which is only Calxeda-relevant
> is called in cpufreq_stat_notifier_trans, which is the frequency change
> notifier call, AFAICT.
>
> So each cpufreq driver will be paying that small and needless penalty
> now for nothing and on each frequency change. Which adds to the
> kernel-wide bloat and we absolutely don't want that.
>
> So you probably need to find a slick way of detecting calxeda hw
> somewhere along the init path of cpufreq_stats_init and set a
> hw-specific flag instead of adding that cost to each driver.
Mark, I suppose you'd like me to take this series for v3.8, but the above
comment from Boris has to be addressed for that.
Thanks,
Rafael
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
next prev parent reply other threads:[~2012-11-24 10:00 UTC|newest]
Thread overview: 269+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-30 21:04 [PATCH 0/6] cpufreq: add support for Calxeda ECX-1000 (highbank) Mark Langsdorf
2012-10-30 21:04 ` [PATCH 1/6] arm: use devicetree to get smp_twd clock Mark Langsdorf
2012-10-30 21:04 ` Mark Langsdorf
2012-10-30 21:04 ` [PATCH 2/6] clk, highbank: remove non-bypass reset mode Mark Langsdorf
2012-10-30 21:04 ` [PATCH 3/6] cpufreq: tolerate inexact values when collecting stats Mark Langsdorf
2012-10-30 21:04 ` [PATCH 4/6] arm highbank: add support for pl320 IPC Mark Langsdorf
2012-10-30 21:04 ` [PATCH 5/6] power: export opp cpufreq functions Mark Langsdorf
2012-10-31 1:17 ` Nishanth Menon
2012-10-31 1:17 ` Nishanth Menon
2012-10-30 21:04 ` [PATCH 6/6] cpufreq, highbank: add support for highbank cpufreq Mark Langsdorf
2012-10-31 0:21 ` [PATCH 0/6] cpufreq: add support for Calxeda ECX-1000 (highbank) Rafael J. Wysocki
[not found] ` <1351685025-26698-1-git-send-email-mark.langsdorf@calxeda.com>
2012-10-31 12:03 ` [PATCH 1/6] arm: use devicetree to get smp_twd clock Mark Langsdorf
2012-10-31 12:03 ` [PATCH 3/6] cpufreq: tolerate inexact values when collecting stats Mark Langsdorf
2012-11-01 2:14 ` MyungJoo Ham
2012-11-02 18:51 ` [PATCH 0/6 v2] cpufreq: add support for Calxeda ECX-1000 (highbank) Mark Langsdorf
2012-11-02 18:51 ` [PATCH 1/6 v2] arm: use devicetree to get smp_twd clock Mark Langsdorf
2012-11-02 18:51 ` Mark Langsdorf
2012-11-02 18:51 ` Mark Langsdorf
2012-11-04 10:08 ` Russell King - ARM Linux
2012-11-04 10:08 ` Russell King - ARM Linux
2012-11-05 22:28 ` Mark Langsdorf
2012-11-05 22:28 ` Mark Langsdorf
2012-11-05 22:31 ` Russell King - ARM Linux
2012-11-05 22:31 ` Russell King - ARM Linux
2012-11-05 22:49 ` Mark Langsdorf
2012-11-05 22:49 ` Mark Langsdorf
2012-11-02 18:51 ` [PATCH 2/6 v2] clk, highbank: remove non-bypass reset mode Mark Langsdorf
2012-11-02 18:51 ` [PATCH 3/6 v2] cpufreq: tolerate inexact values when collecting stats Mark Langsdorf
2012-11-02 18:51 ` [PATCH 4/6 v2] arm highbank: add support for pl320 IPC Mark Langsdorf
2012-11-02 18:51 ` [PATCH 5/6 v2] power: export opp cpufreq functions Mark Langsdorf
2012-11-02 18:51 ` [PATCH 6/6 v2] cpufreq, highbank: add support for highbank cpufreq Mark Langsdorf
2012-11-02 21:45 ` [PATCH 0/6 v2] cpufreq: add support for Calxeda ECX-1000 (highbank) Rafael J. Wysocki
2012-11-06 20:18 ` [PATCH 0/6 v3] " Mark Langsdorf
2012-11-06 20:18 ` [PATCH 1/6 v3] arm: use devicetree to get smp_twd clock Mark Langsdorf
2012-11-06 20:18 ` [PATCH 2/6 v3] clk, highbank: remove non-bypass reset mode Mark Langsdorf
2012-11-06 20:18 ` [PATCH 3/6 v3] cpufreq: tolerate inexact values when collecting stats Mark Langsdorf
2012-11-06 20:18 ` [PATCH 4/6 v3] arm highbank: add support for pl320 IPC Mark Langsdorf
2012-11-06 20:18 ` [PATCH 5/6 v3] power: export opp cpufreq functions Mark Langsdorf
2012-11-06 20:18 ` [PATCH 6/6 v3] cpufreq, highbank: add support for highbank cpufreq Mark Langsdorf
2012-11-07 18:11 ` [PATCH 0/6 v3] cpufreq: add support for Calxeda ECX-1000 (highbank) Mark Langsdorf
2012-11-07 18:32 ` [PATCH 0/6 v4] " Mark Langsdorf
2012-11-07 18:32 ` [PATCH 1/6 v4] arm: use devicetree to get smp_twd clock Mark Langsdorf
2012-11-07 18:32 ` [PATCH 2/6 v4] clk, highbank: Prevent glitches in non-bypass reset mode Mark Langsdorf
2012-11-12 21:24 ` Mike Turquette
2012-11-12 21:24 ` Mike Turquette
2012-11-12 21:35 ` Mark Langsdorf
2012-11-07 18:32 ` [PATCH 3/6 v4] cpufreq: tolerate inexact values when collecting stats Mark Langsdorf
2012-11-11 16:38 ` Borislav Petkov
2012-11-12 16:35 ` Mark Langsdorf
2012-11-13 16:24 ` Borislav Petkov
2012-11-13 16:33 ` Mark Langsdorf
2012-11-13 19:13 ` Mark Langsdorf
2012-11-17 14:50 ` Borislav Petkov
2012-11-24 10:05 ` Rafael J. Wysocki [this message]
2012-11-26 13:57 ` Mark Langsdorf
2012-11-26 15:25 ` Rafael J. Wysocki
2012-11-07 18:32 ` [PATCH 4/6 v4] arm highbank: add support for pl320 IPC Mark Langsdorf
2012-11-14 14:03 ` Rob Herring
2012-11-07 18:32 ` [PATCH 5/6 v4] power: export opp cpufreq functions Mark Langsdorf
2012-11-07 18:32 ` [PATCH 6/6 v4] cpufreq, highbank: add support for highbank cpufreq Mark Langsdorf
2012-11-07 18:32 ` Mark Langsdorf
2012-11-07 18:51 ` Rob Herring
2012-11-07 18:51 ` Rob Herring
2012-11-24 10:07 ` [PATCH 0/6 v4] cpufreq: add support for Calxeda ECX-1000 (highbank) Rafael J. Wysocki
2012-11-27 15:04 ` [PATCH 0/6 v5] " Mark Langsdorf
2012-11-27 15:04 ` Mark Langsdorf
2012-11-27 15:04 ` [PATCH 1/6 v5] arm: use devicetree to get smp_twd clock Mark Langsdorf
2012-11-27 15:04 ` Mark Langsdorf
2012-11-27 15:04 ` [PATCH 2/6 v5] clk, highbank: Prevent glitches in non-bypass reset mode Mark Langsdorf
2012-11-27 15:04 ` Mark Langsdorf
2012-11-27 18:15 ` Mike Turquette
2012-11-27 18:15 ` Mike Turquette
2012-11-27 15:04 ` [PATCH 3/6 v5] cpufreq: tolerate inexact values when collecting stats Mark Langsdorf
2012-11-27 15:04 ` Mark Langsdorf
2012-11-27 15:04 ` [PATCH 4/6 v5] arm highbank: add support for pl320 IPC Mark Langsdorf
2012-11-27 15:04 ` Mark Langsdorf
2012-11-27 16:12 ` Thomas Petazzoni
2012-11-27 16:12 ` Thomas Petazzoni
2012-11-27 19:53 ` Mark Langsdorf
2012-11-27 19:53 ` Mark Langsdorf
2012-11-27 19:53 ` Mark Langsdorf
[not found] ` <1354602789308-564771.post@n7.nabble.com>
2013-01-29 2:26 ` liuhuan123
2013-02-06 5:43 ` liuhuan123
2013-02-21 5:11 ` liuhuan123
2013-03-21 4:01 ` liuhuan123
2013-03-12 5:29 ` liuhuan123
2012-11-27 15:04 ` [PATCH 5/6 v5] power: export opp cpufreq functions Mark Langsdorf
2012-11-27 15:04 ` Mark Langsdorf
2012-11-27 15:04 ` [PATCH 6/6 v5] cpufreq, highbank: add support for highbank cpufreq Mark Langsdorf
2012-11-27 15:04 ` Mark Langsdorf
2012-11-27 15:04 ` Mark Langsdorf
2012-11-27 19:04 ` [PATCH 0/6 v5] cpufreq: add support for Calxeda ECX-1000 (highbank) Rafael J. Wysocki
2012-11-27 19:04 ` Rafael J. Wysocki
2012-11-27 20:04 ` [PATCH 0/6 v6] " Mark Langsdorf
2012-11-27 20:04 ` Mark Langsdorf
2012-11-27 20:04 ` [PATCH 1/6 v6] arm: use devicetree to get smp_twd clock Mark Langsdorf
2012-11-27 20:04 ` Mark Langsdorf
2012-11-27 20:04 ` [PATCH 2/6 v6] clk, highbank: Prevent glitches in non-bypass reset mode Mark Langsdorf
2012-11-27 20:04 ` Mark Langsdorf
2012-11-27 20:04 ` [PATCH 3/6 v6] cpufreq: tolerate inexact values when collecting stats Mark Langsdorf
2012-11-27 20:04 ` Mark Langsdorf
2012-11-27 20:04 ` [PATCH 4/6 v6] arm highbank: add support for pl320 IPC Mark Langsdorf
2012-11-27 20:04 ` Mark Langsdorf
2012-11-27 20:04 ` Mark Langsdorf
2012-11-27 20:04 ` [PATCH 5/6 v6] power: export opp cpufreq functions Mark Langsdorf
2012-11-27 20:04 ` Mark Langsdorf
2012-11-27 20:04 ` [PATCH 6/6 v6] cpufreq, highbank: add support for highbank cpufreq Mark Langsdorf
2012-11-27 20:04 ` Mark Langsdorf
2012-11-27 20:04 ` Mark Langsdorf
2012-11-28 2:32 ` Shawn Guo
2012-11-28 2:32 ` Shawn Guo
2012-11-28 2:32 ` Shawn Guo
2012-11-28 13:16 ` Mark Langsdorf
2012-11-28 13:16 ` Mark Langsdorf
2012-11-28 13:16 ` Mark Langsdorf
2012-11-28 14:58 ` Shawn Guo
2012-11-28 14:58 ` Shawn Guo
2012-11-28 14:58 ` Shawn Guo
2012-11-28 15:17 ` Shawn Guo
2012-11-28 15:17 ` Shawn Guo
2012-11-28 15:17 ` Shawn Guo
2012-11-28 15:01 ` Mark Langsdorf
2012-11-28 15:01 ` Mark Langsdorf
2012-11-28 15:01 ` Mark Langsdorf
2012-11-28 16:01 ` Mike Turquette
2012-11-28 16:01 ` Mike Turquette
2012-11-28 16:01 ` Mike Turquette
2012-11-28 16:18 ` Mark Langsdorf
2012-11-28 16:18 ` Mark Langsdorf
2012-11-28 16:18 ` Mark Langsdorf
2012-11-28 21:05 ` Mike Turquette
2012-11-28 21:05 ` Mike Turquette
2012-11-28 21:05 ` Mike Turquette
2012-11-29 0:24 ` Mark Langsdorf
2012-11-29 0:24 ` Mark Langsdorf
2012-11-29 0:24 ` Mark Langsdorf
2012-11-29 1:51 ` Shawn Guo
2012-11-29 1:51 ` Shawn Guo
2012-11-29 1:51 ` Shawn Guo
2012-11-29 4:34 ` Mike Turquette
2012-11-29 4:34 ` Mike Turquette
2012-11-29 4:34 ` Mike Turquette
2012-12-04 14:33 ` [PATCH 0/6 v7] cpufreq: add support for Calxeda ECX-1000 (highbank) Mark Langsdorf
2012-12-04 14:33 ` Mark Langsdorf
2012-12-04 14:33 ` [PATCH 1/6 v7] arm: use devicetree to get smp_twd clock Mark Langsdorf
2012-12-04 14:33 ` Mark Langsdorf
2012-12-04 14:33 ` [PATCH 2/6 v7] clk, highbank: Prevent glitches in non-bypass reset mode Mark Langsdorf
2012-12-04 14:33 ` Mark Langsdorf
2012-12-04 14:33 ` [PATCH 3/6 v7] cpufreq: tolerate inexact values when collecting stats Mark Langsdorf
2012-12-04 14:33 ` Mark Langsdorf
2012-12-04 14:34 ` [PATCH 4/6 v7] arm highbank: add support for pl320 IPC Mark Langsdorf
2012-12-04 14:34 ` Mark Langsdorf
2012-12-04 14:34 ` Mark Langsdorf
2012-12-04 14:34 ` [PATCH 5/6 v7] power: export opp cpufreq functions Mark Langsdorf
2012-12-04 14:34 ` Mark Langsdorf
2012-12-04 14:34 ` [PATCH 6/6 v7] cpufreq, highbank: add support for highbank cpufreq Mark Langsdorf
2012-12-04 14:34 ` Mark Langsdorf
2012-12-04 16:21 ` Shawn Guo
2012-12-04 16:21 ` Shawn Guo
2012-12-04 16:21 ` Shawn Guo
2012-12-05 16:48 ` [PATCH 0/6 v8] cpufreq: add support for Calxeda ECX-1000 (highbank) Mark Langsdorf
2012-12-05 16:48 ` Mark Langsdorf
2012-12-05 16:48 ` [PATCH 1/6 v8] arm: use devicetree to get smp_twd clock Mark Langsdorf
2012-12-05 16:48 ` Mark Langsdorf
2012-12-05 16:48 ` [PATCH 2/6 v8] clk, highbank: Prevent glitches in non-bypass reset mode Mark Langsdorf
2012-12-05 16:48 ` Mark Langsdorf
2012-12-05 18:02 ` Mike Turquette
2012-12-05 18:02 ` Mike Turquette
2012-12-05 16:48 ` [PATCH 3/6 v8] cpufreq: tolerate inexact values when collecting stats Mark Langsdorf
2012-12-05 16:48 ` Mark Langsdorf
2012-12-05 16:48 ` [PATCH 4/6 v8] arm highbank: add support for pl320 IPC Mark Langsdorf
2012-12-05 16:48 ` Mark Langsdorf
2012-12-05 16:48 ` [PATCH 5/6 v8] power: export opp cpufreq functions Mark Langsdorf
2012-12-05 16:48 ` Mark Langsdorf
2012-12-05 16:48 ` [PATCH 6/6 v8] cpufreq, highbank: add support for highbank cpufreq Mark Langsdorf
2012-12-05 16:48 ` Mark Langsdorf
2012-12-05 18:49 ` Mike Turquette
2012-12-05 18:49 ` Mike Turquette
2012-12-05 22:09 ` Mark Langsdorf
2012-12-05 22:09 ` Mark Langsdorf
2012-12-05 22:09 ` Mark Langsdorf
2012-12-06 9:37 ` Shawn Guo
2012-12-06 9:37 ` Shawn Guo
2012-12-06 9:37 ` Shawn Guo
2012-12-27 13:12 ` [PATCH 0/6 v8] cpufreq: add support for Calxeda ECX-1000 (highbank) Rafael J. Wysocki
2012-12-27 13:12 ` Rafael J. Wysocki
2012-12-27 13:28 ` Mark Langsdorf
2012-12-27 13:28 ` Mark Langsdorf
2012-12-27 13:28 ` Mark Langsdorf
2012-12-27 14:43 ` Rafael J. Wysocki
2012-12-27 14:43 ` Rafael J. Wysocki
2012-12-27 14:43 ` Rafael J. Wysocki
2012-12-06 22:42 ` [PATCH 0/6 v9] " Mark Langsdorf
2012-12-06 22:42 ` Mark Langsdorf
2012-12-06 22:42 ` [PATCH 1/6 v9] arm: use devicetree to get smp_twd clock Mark Langsdorf
2012-12-06 22:42 ` Mark Langsdorf
2012-12-07 14:55 ` Thiago Farina
2012-12-07 14:55 ` Thiago Farina
2012-12-27 5:11 ` Prashant Gaikwad
2012-12-27 5:11 ` Prashant Gaikwad
2012-12-27 5:11 ` Prashant Gaikwad
2012-12-06 22:42 ` [PATCH 2/6 v9] clk, highbank: Prevent glitches in non-bypass reset mode Mark Langsdorf
2012-12-06 22:42 ` Mark Langsdorf
2012-12-06 22:42 ` [PATCH 3/6 v9] cpufreq: tolerate inexact values when collecting stats Mark Langsdorf
2012-12-06 22:42 ` Mark Langsdorf
2012-12-06 22:42 ` [PATCH 4/6 v9] arm highbank: add support for pl320 IPC Mark Langsdorf
2012-12-06 22:42 ` Mark Langsdorf
2012-12-06 22:42 ` [PATCH 5/6 v9] power: export opp cpufreq functions Mark Langsdorf
2012-12-06 22:42 ` Mark Langsdorf
2012-12-06 22:42 ` [PATCH 6/6 v9] cpufreq, highbank: add support for highbank cpufreq Mark Langsdorf
2012-12-06 22:42 ` Mark Langsdorf
2012-12-07 7:04 ` Mike Turquette
2012-12-07 7:04 ` Mike Turquette
2013-01-04 16:35 ` [PATCH 0/4 v10] cpufreq: add support for Calxeda ECX-1000 (highbank) Mark Langsdorf
2013-01-04 16:35 ` Mark Langsdorf
2013-01-04 16:35 ` [PATCH 1/4 v10] arm: use devicetree to get smp_twd clock Mark Langsdorf
2013-01-04 16:35 ` Mark Langsdorf
2013-01-10 23:34 ` Russell King - ARM Linux
2013-01-10 23:34 ` Russell King - ARM Linux
2013-01-11 14:40 ` Rob Herring
2013-01-11 14:40 ` Rob Herring
2013-01-04 16:35 ` [PATCH 2/4 v10] clk, highbank: Prevent glitches in non-bypass reset mode Mark Langsdorf
2013-01-04 16:35 ` Mark Langsdorf
2013-01-04 16:35 ` [PATCH 3/4 v10] arm highbank: add support for pl320 IPC Mark Langsdorf
2013-01-04 16:35 ` Mark Langsdorf
2013-01-04 16:35 ` [PATCH 4/4 v10] cpufreq, highbank: add support for highbank cpufreq Mark Langsdorf
2013-01-04 16:35 ` Mark Langsdorf
2013-01-25 19:46 ` [PATCH 0/4 v11] cpufreq: add support for Calxeda ECX-1000 (highbank) Mark Langsdorf
2013-01-25 19:46 ` Mark Langsdorf
2013-01-25 19:46 ` [PATCH 1/4 v11] arm: use device tree to get smp_twd clock Mark Langsdorf
2013-01-25 19:46 ` Mark Langsdorf
2013-01-25 21:03 ` Rafael J. Wysocki
2013-01-25 21:03 ` Rafael J. Wysocki
2013-01-25 21:40 ` Russell King - ARM Linux
2013-01-25 21:40 ` Russell King - ARM Linux
2013-01-25 22:15 ` Rafael J. Wysocki
2013-01-25 22:15 ` Rafael J. Wysocki
2013-01-25 19:46 ` [PATCH 2/4 v11] clk, highbank: Prevent glitches in non-bypass reset mode Mark Langsdorf
2013-01-25 19:46 ` Mark Langsdorf
2013-01-25 19:46 ` [PATCH 3/4 v11] arm highbank: add support for pl320 IPC Mark Langsdorf
2013-01-25 19:46 ` Mark Langsdorf
2013-01-28 12:49 ` Rafael J. Wysocki
2013-01-28 12:49 ` Rafael J. Wysocki
2013-01-28 13:44 ` Mark Langsdorf
2013-01-28 13:44 ` Mark Langsdorf
2013-01-28 13:44 ` Mark Langsdorf
2013-01-28 20:48 ` Rafael J. Wysocki
2013-01-28 20:48 ` Rafael J. Wysocki
2013-01-28 20:48 ` Rafael J. Wysocki
2013-01-25 19:46 ` [PATCH 4/4] cpufreq, highbank: add support for highbank cpufreq Mark Langsdorf
2013-01-25 19:46 ` Mark Langsdorf
2013-01-26 14:39 ` Shawn Guo
2013-01-26 14:39 ` Shawn Guo
2013-01-26 14:39 ` Shawn Guo
2013-01-26 22:24 ` Rafael J. Wysocki
2013-01-26 22:24 ` Rafael J. Wysocki
2013-01-28 8:37 ` Shawn Guo
2013-01-28 8:37 ` Shawn Guo
2013-01-28 8:37 ` Shawn Guo
2013-01-28 16:13 ` [PATCH 0/4 v12] cpufreq: add support for Calxeda ECX-1000 (highbank) Mark Langsdorf
2013-01-28 16:13 ` Mark Langsdorf
2013-01-28 16:13 ` [PATCH 1/4 v12] arm: use device tree to get smp_twd clock Mark Langsdorf
2013-01-28 16:13 ` Mark Langsdorf
2013-01-28 16:13 ` [PATCH 2/4 v12] clk, highbank: Prevent glitches in non-bypass reset mode Mark Langsdorf
2013-01-28 16:13 ` Mark Langsdorf
2013-01-28 16:13 ` [PATCH 3/4 v12] arm highbank: add support for pl320 IPC Mark Langsdorf
2013-01-28 16:13 ` Mark Langsdorf
2013-01-28 16:13 ` [PATCH 4/4 v12] cpufreq, highbank: add support for highbank cpufreq Mark Langsdorf
2013-01-28 16:13 ` Mark Langsdorf
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