Date: Fri, 16 Sep 2005 18:49:11 +0200 From: Oliver Lehmann <lehmann@ans-netz.de> To: joseph.koshy@gmail.com Cc: current@freebsd.org Subject: Re: low(er) disk performance with sched_4bsd then with sched_ule Message-ID: <20050916184911.38e2739a.lehmann@ans-netz.de> In-Reply-To: <84dead720509160921732e7f96@mail.gmail.com> References: <20050914194612.15692485.lehmann@ans-netz.de> <43286E37.40203@samsco.org> <20050914222013.178dc4dc.lehmann@ans-netz.de> <84dead72050914135239514c49@mail.gmail.com> <20050915000053.448f251b.lehmann@ans-netz.de> <84dead7205091500152a7c25d1@mail.gmail.com> <20050915172005.072f4bdf.lehmann@ans-netz.de> <20050915181238.54b16b4b.lehmann@ans-netz.de> <84dead720509160921732e7f96@mail.gmail.com>
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Joseph Koshy wrote: > I'm just not able to reproduce this kind of skewed > profile on -current on a uniprocessor amd64 and > on a P4 HT machine. I remember that when I tried w/o SMP it was much faster with 4bsd then it was with SMP (4BSd-UP was about the same as ULE with SMP). That was the point why I tried SMP with ULE - because I hoped to get the performance back I lost with switching from UP to SMP with 4BSD. > Just as an off-chance: how upto-date is your kernel? In > particular, do you have the following fix: > > "sys/vm/vm_pager.c:" > revision 1.105.2.1 I've 1.105 - I'll cvsup my 6_RELENG and report back if anything changed. -- Oliver Lehmann http://www.pofo.de/ http://wishlist.ans-netz.de/
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