Date: Sun, 16 Sep 2007 20:52:32 -0700 From: "Kip Macy" <kip.macy@gmail.com> To: freebsd-current@freebsd.org Subject: Re: SCHED_ULE on desktop system Message-ID: <b1fa29170709162052s56d605eam1192ae3543b1df8b@mail.gmail.com> In-Reply-To: <20070917033948.GK1051@redundancy.redundancy.org> References: <20070916214753.GJ1051@redundancy.redundancy.org> <20070916225019.B921C4500C@ptavv.es.net> <20070917033948.GK1051@redundancy.redundancy.org>
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On 9/16/07, David E. Thiel <lx@freebsd.org> wrote: > On Sun, Sep 16, 2007 at 03:50:19PM -0700, Kevin Oberman wrote: > > I have been seeing this for quite some time and, while the scheduler may > > make a bit of difference, I suspect pager issues. As long as I have > > available memory, interactivity is fine. If I run a big build and I see > > swap file use, things slow to a crawl. I see very slow re-draws of the > > screen and general lack of responsiveness. > > > > I run gkrellm and can tell at a glance when swap usage starts to > > increase. The linkage is clear and not terribly surprising. It may be > > that you need to add a bit more RAM. > > While I wouldn't mind adding more RAM, this happens with about 60% > memory utilization, and top verifies no swap is being used. I'll believe > that it may not be all the scheduler's fault (since I see it to some > degree regardless of scheduler), but in my case, it's not paging. > > I did actually just switch to 4BSD without PREEMPTION, and the audio > skipping and jerkiness that I was getting before is no longer happening. > Maybe something in PREEMPTION is causing problems with both schedulers? > Could you try setting kern.hz="100" Thanks. -Kip
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