Date: Thu, 15 Sep 2005 18:12:38 +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: <20050915181238.54b16b4b.lehmann@ans-netz.de> In-Reply-To: <20050915172005.072f4bdf.lehmann@ans-netz.de> 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>
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Oliver Lehmann wrote: > Joseph Koshy wrote: > > > What happens if you use a kernel with 'options NO_ADAPTIVE_MUTEXES' ? > > I'll try this and respond back > Hmm, that made it more worse root@nudel olivleh1> pmcstat -S instructions -c 1 -S instructions -O /tmp/4bsd.2.out dd if=/dev/zero of=/mnt/files/test.dd bs=64k count=32000 32000+0 records in 32000+0 records out 2097152000 bytes transferred in 94.441797 secs (22205761 bytes/sec) root@nudel olivleh1> pmcstat -R /tmp/4bsd.2.out -g root@nudel olivleh1> gprof -l /boot/kernel/kernel ./p6-inst-retired/kernel.gmon > gprof.4bsd.2 time is in ticks, not seconds root@nudel olivleh1> http://pofo.de/tmp/gprof.4bsd.2 -- Oliver Lehmann http://www.pofo.de/ http://wishlist.ans-netz.de/
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