From: Corey Minyard <minyard@acm.org>
To: Huang Ying <ying.huang@intel.com>, Corey Minyard <cminyard@mvista.com>
Cc: LKML <linux-kernel@vger.kernel.org>, LKP ML <lkp@01.org>
Subject: Re: [LKP] [ipmi] d9b7e4f717a: +52.5% turbostat.%Busy
Date: Thu, 12 Feb 2015 16:50:49 -0600 [thread overview]
Message-ID: <54DD2E49.9070402@acm.org> (raw)
In-Reply-To: <1423627517.8112.0.camel@intel.com>
I'm not quite sure how to interpret this data, but I'm assuming that
with the periodic checks it's waking up a lot more than it used to.
I'm not sure why this is the case, but it depends on what userland
software is doing with the driver. I'll try to reproduce and see what I
can find.
-corey
On 02/10/2015 10:05 PM, Huang Ying wrote:
> FYI, we noticed the below changes on
>
> commit d9b7e4f717a167610a49ceb9e5969e80146c89a8 ("ipmi: Periodically check to see if irqs and messages are set right")
>
> testbox/testcase/testparams: avoton3/idle/performance-10m
>
> 6a11e5c67a397e9a d9b7e4f717a167610a49ceb9e5
> ---------------- --------------------------
> %stddev %change %stddev
> \ | \
> 0.10 ± 0% +52.5% 0.15 ± 2% turbostat.%Busy
> 2 ± 0% +50.0% 3 ± 0% turbostat.Avg_MHz
>
> turbostat.%Busy
>
> 0.2 ++----O-O------------------------------------------------------------+
> | |
> 0.18 ++ |
> | |
> | |
> 0.16 ++ O O O O O O O O O O O O O O |
> O O O O O O O O |
> 0.14 ++ |
> | |
> 0.12 ++ *.* * |
> | .. + : + |
> | .* + : + |
> 0.1 *+ *.. .*.*.. .*..* *..*..*.*..*..*..*.*..*..*..*.*..*..*
> | *. *. |
> 0.08 ++-------------------------------------------------------------------+
>
>
> [*] bisect-good sample
> [O] bisect-bad sample
>
> To reproduce:
>
> apt-get install ruby ruby-oj
> git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
> cd lkp-tests
> bin/setup-local job.yaml # the job file attached in this email
> bin/run-local job.yaml
>
> Disclaimer:
> Results have been estimated based on internal Intel analysis and are provided
> for informational purposes only. Any difference in system hardware or software
> design or configuration may affect actual performance.
>
>
>
>
> _______________________________________________
> LKP mailing list
> LKP@linux.intel.com
>
prev parent reply other threads:[~2015-02-12 22:50 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-11 4:05 [LKP] [ipmi] d9b7e4f717a: +52.5% turbostat.%Busy Huang Ying
2015-02-12 22:50 ` Corey Minyard [this message]
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