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Message-ID: <20080127221422.GA17085@elte.hu> Date: Sun, 27 Jan 2008 23:14:22 +0100 From: Ingo Molnar <mingo@...e.hu> To: "Benjamin K. Stuhl" <benjamin.stuhl@...orado.edu> Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>, Thomas Gleixner <tglx@...utronix.de>, Linux-Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: "sched: add vslice" causes horrible interactivity under load * Benjamin K. Stuhl <benjamin.stuhl@...orado.edu> wrote: > I recently upgraded from 2.6.23.x to 2.6.24 and found that whereas > with 2.6.23.x I could have multiple "make -j3" compilation runs going > in the background with no real problems (on a dual-core Core 2), with > 2.6.24 I get multiple-second lags when trying to switch tasks in KDE. that sounds bad ... Could you send me the output of: http://people.redhat.com/mingo/cfs-scheduler/tools/cfs-debug-info.sh while such delays are happening? Please enable CONFIG_SCHED_DEBUG=y and CONFIG_SCHEDSTATS=y as well before doing the dump. Also please send your .config. to get best output from cfs-debug-info.sh, please first run this: http://people.redhat.com/mingo/cfs-scheduler/tools/cfs-debug-info-clear.sh then reproduce the delay, and then run cfs-debug-info.sh to capture all that task stats. Ingo -- 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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