Date: Thu, 12 Aug 2004 10:21:38 +0200 From: Andre Oppermann <andre@freebsd.org> To: Jeff Roberson <jroberson@chesapeake.net> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/kern sched_ule.c Message-ID: <411B2892.B39C83E0@freebsd.org> References: <200408120756.i7C7uXOQ011743@repoman.freebsd.org> <20040812035656.S7322@mail.chesapeake.net>
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Jeff Roberson wrote: > > On Thu, 12 Aug 2004, Jeff Roberson wrote: > > > jeff 2004-08-12 07:56:33 UTC > > > > FreeBSD src repository > > > > Modified files: > > sys/kern sched_ule.c > > Log: > > - Introduce a new flag KEF_HOLD that prevents sched_add() from doing a > > migration. Use this in sched_prio() and sched_switch() to stop us from > > migrating threads that are in short term sleeps or are runnable. These > > extra migrations were added in the patches to support KSE. > > This patch brings my 'super-smack' performance in ULE above that of 4BSD. > worldstone seems unaffected. I would be interested in hearing about what > other performance changes there are as a result of this patch. I would > also be interested in hearing about cases where ULE is slower than 4BSD. See -current list of yesterday. Martin Blapp was reporting problems with some 500 sendmail/milter etc. processes where it get slower and slower compared to 4BSD. -- Andre
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