linux-kernel - Re: [v6 PATCH 0/7]: cpuidle/x86/POWER: Cleanup idle power management code in x86, cleanup drivers/cpuidle/cpuidle.c and introduce cpuidle to POWER.

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Message-ID: <20090925170851.GA28191@linux.vnet.ibm.com>
Date:	Fri, 25 Sep 2009 22:38:51 +0530
From:	Arun R Bharadwaj <arun@...ux.vnet.ibm.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Joel Schopp <jschopp@...tin.ibm.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>,
	Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>,
	Dipankar Sarma <dipankar@...ibm.com>,
	Balbir Singh <balbir@...ibm.com>,
	Gautham R Shenoy <ego@...ibm.com>,
	Shaohua Li <shaohua.li@...el.com>,
	Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>,
	Arun Bharadwaj <arun@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [v6 PATCH 0/7]: cpuidle/x86/POWER: Cleanup idle power
	management code in x86, cleanup drivers/cpuidle/cpuidle.c and
	introduce cpuidle to POWER.

* Arun R Bharadwaj <arun@...ux.vnet.ibm.com> [2009-09-22 16:55:27]:
Hi,

I have done the following experiments and have posted the results
below.


Average of 5 iterations:
------------------------------------------------------------------------------
------------------------------------------------------------------------------

Kernbench make -j16 results on a
16 core x86 machine _with_deep_sleep_ support (C1,C2,C3)


Without the patches applied			With the patches applied


	31.8s						30.4s

------------------------------------------------------------------------------
------------------------------------------------------------------------------


Kernbench make -j8 results on a
8 core x86 machine _without_deep_sleep_ support (only mwait)


Without the patches applied			With the patches applied


	20.2s						20.4s

------------------------------------------------------------------------------
------------------------------------------------------------------------------

Kernbench make -j8 results on a 8 core _dedicated_lpar_pSeries_ machine


Without the patches applied                     With the patches applied


	4m, 37s						4m, 36s

------------------------------------------------------------------------------
------------------------------------------------------------------------------

Please let me know if any other kind of testing is necessary.


Based on the feedback, I will post out the next iteration with a few
minor bug fixes.


thanks,
arun
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