Date: Fri, 25 Sep 2009 00:40:04 GMT From: David Xu <davidxu@freebsd.org> To: freebsd-threads@FreeBSD.org Subject: Re: threads/128922: threads hang with xorg running Message-ID: <200909250040.n8P0e4MU025736@freefall.freebsd.org>
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The following reply was made to PR threads/128922; it has been noted by GNATS. From: David Xu <davidxu@freebsd.org> To: bug-followup@freebsd.org, dreigcht@gmail.com Cc: Subject: Re: threads/128922: threads hang with xorg running Date: Fri, 25 Sep 2009 08:31:10 +0800 Try to set scheduler's preemption threshold to large priority value, the default one is too low for cpu-bound application, and can starve other threads under heavy cpu load. for example: sysctl kern.sched.preempt_thresh=220 On 7.x and 8.0 kernel, I always set a large value for my Desktop PC. Regards, David Xu
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