Date: Sun, 2 Mar 2008 08:04:54 -0800 (PST) From: Abdullah Ibn Hamad Al-Marri <wearabnet@yahoo.ca> To: Jeff Roberson <jeff@FreeBSD.org>, src-committers@FreeBSD.org, cvs-src@FreeBSD.org Subject: Re: cvs commit: src/sys/kern sched_ule.c Message-ID: <688753.81849.qm@web33702.mail.mud.yahoo.com>
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----- Original Message ---- > From: Jeff Roberson <jeff@FreeBSD.org> > To: src-committers@FreeBSD.org; cvs-src@FreeBSD.org; cvs-all@FreeBSD.org > Sent: Sunday, March 2, 2008 11:21:00 AM > Subject: cvs commit: src/sys/kern sched_ule.c > > jeff 2008-03-02 08:20:59 UTC > > FreeBSD src repository > > Modified files: > sys/kern sched_ule.c > Log: > Add support for the new cpu topology api: > - When searching for affinity search backwards in the tree from the last > cpu we ran on while the thread still has affinity for the group. This > can take advantage of knowledge of shared L2 or L3 caches among a > group of cores. > - When searching for the least loaded cpu find the least loaded cpu via > the least loaded path through the tree. This load balances system bus > links, individual cache levels, and hyper-threaded/SMT cores. > - Make the periodic balancer recursively balance the highest and lowest > loaded cpu across each link. > > Add support for cpusets: > - Convert the cpuset to a simple native cpumask_t while the kernel still > only supports cpumask. > - Pass the derived cpumask down through the cpu_search functions to > restrict the result cpus. > - Make the various steal functions resilient to failure since all threads > can not run on all cpus any longer. > > General improvements: > - Precisely track the lowest priority thread on every runq with > tdq_setlowpri(). Before it was more advisory but this ended up having > pathological behaviors. > - Remove many #ifdef SMP conditions to simplify the code. > - Get rid of the old cumbersome tdq_group. This is more naturally > expressed via the cpu_group tree. > > Sponsored by: Nokia > Testing by: kris > > Revision Changes Path > 1.226 +443 -501 src/sys/kern/sched_ule.c > _______________________________________________ Is it possible to have patch for RELENG_7? Regards, -Abdullah Ibn Hamad Al-Marri Arab Portal http://www.WeArab.Net/ ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
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