Date: Wed, 30 Jan 2008 08:55:14 -0500 From: John Baldwin <jhb@freebsd.org> To: freebsd-stable@freebsd.org Cc: Joe Peterson <joe@skyrush.com>, jeff@FreeBSD.org Subject: Re: New KTR trace for mouse freezing/stuttering in 7.0-RC1 Message-ID: <200801300855.14582.jhb@freebsd.org> In-Reply-To: <479A6346.3050503@skyrush.com> References: <1199812249.96494.133.camel@predator-ii.buffyverse> <200801250937.22051.jhb@freebsd.org> <479A6346.3050503@skyrush.com>
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On Friday 25 January 2008 05:31:34 pm Joe Peterson wrote: > John Baldwin wrote: > > Hmm, when I look at that graph using schedgraphy from HEAD it just looks > > like xtrs is using up all the CPU. > > Yeah, xtrs is eating a lot of CPU, but I've never seen this affect the > mouse movement (making it really jerky) the same way on, e.g., Linux. > And the xtrs test is just a way to *reliably* make it happen. It > happens intermittently all of the time (at least every few minutes, and > often in small batches) even when the system is pretty idle... > > -Joe So it's a scheduling bug where a compute bound process is starving an interactive one basically. :) Since you are using ULE, I would try talking to Jeff (jeff@) to see if he can address this. -- John Baldwin
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