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Message-Id: <200703101002.37920.kernel@kolivas.org> Date: Sat, 10 Mar 2007 10:02:37 +1100 From: Con Kolivas <kernel@...ivas.org> To: Matt Mackall <mpm@...enic.com> Cc: linux-kernel <linux-kernel@...r.kernel.org>, akpm@...ux-foundation.org Subject: Re: 2.6.21-rc3-mm1 RSDL results On Saturday 10 March 2007 09:29, Matt Mackall wrote: > On Sat, Mar 10, 2007 at 09:18:05AM +1100, Con Kolivas wrote: > > On Saturday 10 March 2007 08:57, Con Kolivas wrote: > > > On Saturday 10 March 2007 08:39, Matt Mackall wrote: > > > > So what's different between makes in parallel and make -j 5? Make's > > > > job server uses pipe I/O to control how many jobs are running. > > > > > > Hmm it must be those deep pipes again then. I removed any quirks > > > testing for those from mainline as I suspected it would be ok. Guess > > > I"m wrong. > > > > I shouldn't blame this straight up though if NO_HZ makes it better. > > Something else is going wrong... wtf though? > > Just so we're clear, dynticks has only 'fixed' the single non-parallel > make load so far. Ok, back to the pipe idea. Without needing a kernel recompile, can you try running the make -j5 as a SCHED_BATCH task? This wrapper will make it possible: http://freequaos.host.sk/schedtool/schedtool-1.2.9.tar.bz2 then schedtool -B -e make -j5 If that helps it gives me something to work with. -- -ck - 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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