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Date: Tue, 22 May 2007 21:06:50 -0700 From: William Lee Irwin III <wli@...omorphy.com> To: Con Kolivas <kernel@...ivas.org> Cc: Bill Davidsen <davidsen@....com>, Miguel Figueiredo <elmig@...ianpt.org>, Ray Lee <ray-lk@...rabbit.org>, Linux Kernel M/L <linux-kernel@...r.kernel.org> Subject: Re: Sched - graphic smoothness under load - cfs-v13 sd-0.48 On Wednesday 23 May 2007 10:28, Bill Davidsen wrote: >>> kernel 2.6.21-cfs-v13 2.6.21-ck2 >>> a) 194464 254669 >>> b) 54159 124 >> Everyone seems to like ck2, this makes it look as if the video display >> would be really pretty unusable. While sd-0.48 does show an occasional >> video glitch when watching video under heavy load, it's annoying rather >> than unusable. On Thu, May 24, 2007 at 10:36:44AM +1000, Con Kolivas wrote: > That's because the whole premise of your benchmark relies on a workload that > yield()s itself to the eyeballs on most graphic card combinations when using > glxgears. Your test remains a test of sched_yield in the presence of your > workloads rather than anything else. If people like ck2 it's because in the > real world with real workloads it is better, rather than on a yield() based > benchmark. Repeatedly the reports are that 3d apps and games in normal usage > under -ck are better than mainline and cfs. Maybe people should explicitly hack on sched_yield() for these things and do comparative benchmarking of sched_yield() implementations. -- wli - 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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