Date: Sun, 13 Jul 2008 15:47:30 +0800 From: Eugene Grosbein <eugen@kuzbass.ru> To: Kris Kennaway <kris@freebsd.org> Cc: Nate Eldredge <neldredge@math.ucsd.edu>, freebsd-hackers@freebsd.org Subject: Re: SCHED_4BSD bad interactivity on 7.0 vs 6.3 Message-ID: <20080713074730.GA93887@svzserv.kemerovo.su> In-Reply-To: <4879563B.5090201@FreeBSD.org> References: <Pine.GSO.4.64.0807121125300.20326@zeno.ucsd.edu> <4879563B.5090201@FreeBSD.org>
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On Sun, Jul 13, 2008 at 03:11:23AM +0200, Kris Kennaway wrote: > >It seems like there has been a regression in interactivity from > >6.3-RELEASE to 7.0-RELEASE when using the SCHED_4BSD scheduler. After > >upgrading my single-cpu amd64 box, 7.0 has much worse latency. When > >running a kernel compile, there is a noticeable lag to echo my typing or > >scroll my browser windows, and playing an mp3 frequently cuts out for a > >second or two. This did not happen on 6.3-RELEASE. > > Are you sure it's not the x.org server bug that was present in the > version shipped with 7.0? No, it's not. I have exactly the same problem with SCHED_4BSD after upgrade from 6.3-STABLE to 7.0-STABLE. I didn't upgrade my x.org 6.9.0, only OS (all 6.x compat shims are installed). There is some sort of regression, certainly. Eugene Grosbein
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