Date: Thu, 12 Aug 2004 03:58:16 -0400 (EDT) From: Jeff Roberson <jroberson@chesapeake.net> To: Jeff Roberson <jeff@FreeBSD.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/kern sched_ule.c Message-ID: <20040812035656.S7322@mail.chesapeake.net> In-Reply-To: <200408120756.i7C7uXOQ011743@repoman.freebsd.org> References: <200408120756.i7C7uXOQ011743@repoman.freebsd.org>
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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. > - Only set NEEDRESCHED if the thread we're adding in sched_add() is a > lower priority and is being placed on the current queue. > - Fix some minor whitespace problems. > > Revision Changes Path > 1.121 +19 -7 src/sys/kern/sched_ule.c >
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