Date: Sun, 26 Mar 2023 14:24:07 -0400 From: George Mitchell <george+freebsd@m5p.com> To: freebsd-hackers@freebsd.org Subject: Re: Periodic rant about SCHED_ULE Message-ID: <efbce2d1-dfc1-f6e2-6a32-c9fb411e4daf@m5p.com> In-Reply-To: <ZB%2B/CjZOv0C0pzOX@disp.intra.daemon.contact> References: <ZB%2B/CjZOv0C0pzOX@disp.intra.daemon.contact>
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On 3/25/23 23:42, Peter wrote: > Quoting George Mitchell <george+freebsd@m5p.com>: > > On 3/25/23 11:47, Peter wrote: >>> You're welcome. Can I get a success/failure report? >>> >>> >>> [...] >> Thanks for your help. Regretfully, I have to report that the patch >> did not really help in my case (make buildworld while running dnetc). >> But I have belatedly realized that it's a really good idea to use >> make -j12 to build kernels and the world. With 4BSD and dnetc >> running, I can now buildworld in 3512 seconds (down from 20477), and >> with ULE in 14193 seconds (down from 50290). Peter's patch got it >> down to 13755 seconds. > > Thank You for testing. So at least it doesn't make things worse. > Back then 5 years ago when I made that, I think I've seen a few > more strange things in that code, but they didn't bother me immanently > at that point. Probably there is more work to do there... To oversimplify the discussion I've seen so far on this thread: It would be really nice if the schedulers were kernel loadable modules. GSoC project? Whether SCHED_ULE or SCHED_4BSD should be the default scheduler in the GENERIC kernel is a contentious discussion, but perhaps we need to have that discussion. -- George
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