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From: "Doug Smythies" <dsmythies@telus.net>
To: "'Rafael J. Wysocki'" <rjw@rjwysocki.net>
Cc: "'Frederic Weisbecker'" <fweisbec@gmail.com>,
	"'Thomas Gleixner'" <tglx@linutronix.de>,
	"'Paul McKenney'" <paulmck@linux.vnet.ibm.com>,
	"'Thomas Ilsche'" <thomas.ilsche@tu-dresden.de>,
	"'Rik van Riel'" <riel@surriel.com>,
	"'Aubrey Li'" <aubrey.li@linux.intel.com>,
	"'Mike Galbraith'" <mgalbraith@suse.de>,
	"'LKML'" <linux-kernel@vger.kernel.org>,
	"'Linux PM'" <linux-pm@vger.kernel.org>,
	"'Peter Zijlstra'" <peterz@infradead.org>
Subject: RE: [RFT][PATCH v7.3 5/8] cpuidle: Return nohz hint from cpuidle_select()
Date: Thu, 22 Mar 2018 13:46:49 -0700
Message-ID: <004001d3c21e$e867a3b0$b936eb10$@net> (raw)
In-Reply-To: <1635957.yuHkCe9oyz@aspire.rjw.lan>

On 2018.03.22 10:40 Rafael J. Wysocki wrote:

...[snip]...

>The difference between this and the original v7 (of patch [5/8]) is
> what happens in menu_update().  This time next_timer_us is checked
> properly and if that is above the tick boundary and a tick wakeup occurs,
> the function simply sets mesured_us to a large constant and uses that to
> update both the correction factor and data->intervals[] (the particular
> value used in this patch was found through a bit of experimentation).
>
> Let's see how this works for Thomas and Doug.

System idle test done for 74 minutes.
After boot and after the system settles down for a couple of minutes,
Processor package power is constant at 3.7 Watts. (great)
Not worth a new graph to show a flat line.

V7.3 average package power = 3.68 Watts.
V7 average package power = 3.68 Watts
V7.2+ average package power = 4.06 Watts (+10%)

> For easier testing there is a git branch containing this patch (and the
> rest of the series) at:
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git \
>  idle-loop-v7.3

Thanks. I used this git branch this time and for the first time.
Much easier.

... Doug

  parent reply index

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-20 15:12 [RFT][PATCH v7 0/8] sched/cpuidle: Idle loop rework Rafael J. Wysocki
2018-03-20 15:13 ` [RFT][PATCH v7 1/8] time: tick-sched: Reorganize idle tick management code Rafael J. Wysocki
2018-03-20 15:15 ` [RFT][PATCH v7 2/8] sched: idle: Do not stop the tick upfront in the idle loop Rafael J. Wysocki
2018-03-20 15:15 ` [RFT][PATCH v7 3/8] " Rafael J. Wysocki
2018-03-20 18:00   ` [Correction][RFT][PATCH v7 3/8] sched: idle: Do not stop the tick before cpuidle_idle_call() Rafael J. Wysocki
2018-03-20 15:16 ` [RFT][PATCH v7 4/8] jiffies: Introduce USER_TICK_USEC and redefine TICK_USEC Rafael J. Wysocki
2018-03-20 15:45 ` [RFT][PATCH v7 5/8] cpuidle: Return nohz hint from cpuidle_select() Rafael J. Wysocki
2018-03-21  6:48   ` [RFT][PATCH v7.1 " Rafael J. Wysocki
2018-03-21 11:52     ` Rafael J. Wysocki
2018-03-21 13:03   ` [RFT][PATCH v7.2 " Rafael J. Wysocki
2018-03-21 14:36   ` [RFT][PATCH v7 " Rafael J. Wysocki
2018-03-21 17:59     ` Thomas Ilsche
2018-03-21 22:15       ` Rafael J. Wysocki
2018-03-22 13:18         ` Thomas Ilsche
2018-03-22 17:23           ` Rafael J. Wysocki
2018-03-22  6:24       ` Doug Smythies
2018-03-22 15:41       ` Doug Smythies
2018-03-22 17:21         ` Rafael J. Wysocki
2018-03-21 18:23     ` Doug Smythies
2018-03-22 17:40   ` [RFT][PATCH v7.3 " Rafael J. Wysocki
2018-03-28  9:14     ` Thomas Ilsche
2018-03-30  9:39       ` Rafael J. Wysocki
2018-04-10 15:22         ` Thomas Ilsche
2018-03-22 20:46   ` Doug Smythies [this message]
2018-03-20 15:45 ` [RFT][PATCH v7 6/8] sched: idle: Select idle state before stopping the tick Rafael J. Wysocki
2018-03-27 21:50   ` Thomas Ilsche
2018-03-27 22:10     ` Rafael J. Wysocki
2018-03-28  8:13       ` Rafael J. Wysocki
2018-03-28  8:38         ` Thomas Ilsche
2018-03-28 10:37           ` Rafael J. Wysocki
2018-03-28 10:56             ` Rafael J. Wysocki
2018-03-28 15:15               ` Thomas Ilsche
2018-03-28 20:41               ` Doug Smythies
2018-03-28 23:11                 ` Rafael J. Wysocki
2018-03-20 15:46 ` [RFT][PATCH v7 7/8] cpuidle: menu: Refine idle state selection for running tick Rafael J. Wysocki
2018-03-20 15:47 ` [RFT][PATCH v7 8/8] cpuidle: menu: Avoid selecting shallow states with stopped tick Rafael J. Wysocki
2018-03-20 17:52 ` [RFT][PATCH v7 3/8] sched: idle: Do not stop the tick upfront in the idle loop Doug Smythies
2018-03-20 18:01   ` Rafael J. Wysocki
2018-03-21 12:31 ` [RFT][PATCH v7 0/8] sched/cpuidle: Idle loop rework Rik van Riel
2018-03-21 13:55   ` Rafael J. Wysocki
2018-03-21 14:53     ` Rik van Riel

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