From: Pavel Machek <pavel@suse.cz>
To: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>,
Suresh B Siddha <suresh.b.siddha@intel.com>,
Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Ingo Molnar <mingo@elte.hu>, Dipankar Sarma <dipankar@in.ibm.com>,
Balbir Singh <balbir@linux.vnet.ibm.com>,
Vatsa <vatsa@linux.vnet.ibm.com>,
Gautham R Shenoy <ego@in.ibm.com>,
Andi Kleen <andi@firstfloor.org>,
David Collier-Brown <davecb@sun.com>,
Tim Connors <tconnors@astro.swin.edu.au>,
Max Krasnyansky <maxk@qualcomm.com>,
Gregory Haskins <gregory.haskins@gmail.com>
Subject: Re: [RFC PATCH v5 0/7] Tunable sched_mc_power_savings=n
Date: Thu, 1 Jan 1970 01:13:43 +0100 [thread overview]
Message-ID: <19700101001343.GA1440@ucw.cz> (raw)
In-Reply-To: <20081211173831.2020.57550.stgit@drishya.in.ibm.com>
> Results:
> --------
>
> Basic functionality of the code has not changed and the power vs
> performance benefits for kernbench are similar to the ones posted
> earlier.
>
> KERNBENCH Runs: make -j4 on a x86 8 core, dual socket quad core cpu
> package system
>
> SchedMC Run Time Package Idle Energy Power
> 0 81.28 52.43% 53.53% 1.00x J 1.00y W
> 1 80.71 37.35% 68.91% 0.96x J 0.97y W
> 2 76.05 23.81% 82.65% 0.92x J 0.98y W
>
> *** This is RFC code and not for inclusion ***
Hmm, so it makes it compile faster _and_ it saves power? Why to keep
it tunable at all if it is win-win? Or are there other benchmarks?
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2008-12-14 18:08 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-11 17:42 Vaidyanathan Srinivasan
1970-01-01 0:13 ` Pavel Machek [this message]
2008-12-14 20:08 ` Vaidyanathan Srinivasan
2008-12-15 8:18 ` Peter Zijlstra
2008-12-11 17:42 ` [RFC PATCH v5 1/7] sched: Framework for sched_mc/smt_power_savings=N Vaidyanathan Srinivasan
2008-12-11 18:55 ` Balbir Singh
2008-12-11 19:07 ` Vaidyanathan Srinivasan
2008-12-11 17:42 ` [RFC PATCH v5 2/7] sched: favour lower logical cpu number for sched_mc balance Vaidyanathan Srinivasan
2008-12-15 6:12 ` Balbir Singh
2008-12-15 12:05 ` Vaidyanathan Srinivasan
2008-12-11 17:42 ` [RFC PATCH v5 3/7] sched: nominate preferred wakeup cpu Vaidyanathan Srinivasan
2008-12-15 6:40 ` Balbir Singh
2008-12-15 12:14 ` Vaidyanathan Srinivasan
2008-12-11 17:43 ` [RFC PATCH v5 4/7] sched: bias task wakeups to preferred semi-idle packages Vaidyanathan Srinivasan
2008-12-15 7:01 ` Balbir Singh
2008-12-15 8:25 ` Peter Zijlstra
2008-12-15 8:33 ` Peter Zijlstra
2008-12-15 8:46 ` Balbir Singh
2008-12-15 12:25 ` Vaidyanathan Srinivasan
2008-12-15 18:02 ` Balbir Singh
2008-12-16 7:25 ` Vaidyanathan Srinivasan
2008-12-15 8:43 ` Balbir Singh
2008-12-11 17:43 ` [RFC PATCH v5 5/7] sched: activate active load balancing in new idle cpus Vaidyanathan Srinivasan
2008-12-11 17:43 ` [RFC PATCH v5 6/7] sched: add SD_BALANCE_NEWIDLE at MC and CPU level for sched_mc>0 Vaidyanathan Srinivasan
2008-12-11 17:43 ` [RFC PATCH v5 7/7] sched: idle_balance() does not call load_balance_newidle() Vaidyanathan Srinivasan
2008-12-15 7:02 ` Balbir Singh
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