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Date: Tue, 30 Dec 2008 08:43:58 +0900 From: "MinChan Kim" <minchan.kim@...il.com> To: "Vaidyanathan Srinivasan" <svaidy@...ux.vnet.ibm.com> Cc: "Linux Kernel" <linux-kernel@...r.kernel.org>, "Suresh B Siddha" <suresh.b.siddha@...el.com>, "Venkatesh Pallipadi" <venkatesh.pallipadi@...el.com>, "Peter Zijlstra" <a.p.zijlstra@...llo.nl>, "Ingo Molnar" <mingo@...e.hu>, "Dipankar Sarma" <dipankar@...ibm.com>, "Balbir Singh" <balbir@...ux.vnet.ibm.com>, Vatsa <vatsa@...ux.vnet.ibm.com>, "Gautham R Shenoy" <ego@...ibm.com>, "Andi Kleen" <andi@...stfloor.org>, "David Collier-Brown" <davecb@....com>, "Tim Connors" <tconnors@...ro.swin.edu.au>, "Max Krasnyansky" <maxk@...lcomm.com>, "Gregory Haskins" <gregory.haskins@...il.com>, "Pavel Machek" <pavel@...e.cz>, "Andrew Morton" <akpm@...ux-foundation.org> Subject: Re: [PATCH v7 0/8] Tunable sched_mc_power_savings=n Hi, Vaidyanathan. It's very late reponse. :( > 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 81.68 52.83% 54.71% 1.00x J 1.00y W > 1 80.70 36.62% 70.11% 0.95x J 0.96y W > 2 74.95 19.53% 85.92% 0.90x J 0.98y W > > The results are marginally better than the previous version of the > patch series which could be within the test variation. > > Please feel free to test, and let me know your comments and feedback. > I will post more experimental results with various benchmarks. Your result is very interesting. level 2 is more fast and efficient of power. What's major contributor to use less time in level 2? I think it's cache bounce is less time than old. Is right ? I want to test SCHED_MC but I don't know what you use to benchmark about power. How do I get the data about 'Package, Idle, Energy, Power'? -- Kinds regards, MinChan Kim -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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