Messages in this thread | | | Date | Tue, 30 Dec 2008 08:18:19 +0530 | From | Balbir Singh <> | Subject | Re: [PATCH v7 0/8] Tunable sched_mc_power_savings=n |
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* MinChan Kim <minchan.kim@gmail.com> [2008-12-30 08:43:58]:
> 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 ? >
Yes, correct
> 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'? >
Note, it is Package Idle (for both packages), it is a x86-64 8 core, dual socket, quad core box. It is not Package, Idle.
For Energy and Power you need a means of measuring power like a meter.
> -- > Kinds regards, > MinChan Kim >
-- Balbir
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