Date: Sun, 16 Sep 2007 09:19:07 -0700 From: Garrett Cooper <youshi10@u.washington.edu> To: Harald Schmalzbauer <h.schmalzbauer@omnisec.de> Cc: Jeff Roberson <jroberson@chesapeake.net>, freebsd-current@freebsd.org, Roman Bogorodskiy <novel@freebsd.org> Subject: Re: SCHED_ULE on desktop system Message-ID: <46ED577B.4020607@u.washington.edu> In-Reply-To: <200709161359.50560.h.schmalzbauer@omnisec.de> References: <20070916061932.GA93480@underworld.novel.ru> <20070915234855.G531@10.0.0.1> <200709161359.50560.h.schmalzbauer@omnisec.de>
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Harald Schmalzbauer wrote:
> Am Sonntag, 16. September 2007 08:49:56 schrieb Jeff Roberson:
>
>> On Sun, 16 Sep 2007, Roman Bogorodskiy wrote:
>>
>>> Hello,
>>>
>>> I'm curious if SCHED_ULE is designed to be used on a desktop system. I'm
>>> running -CURRENT at home and tried to use SCHED_ULE for some time. It
>>> works alright while the load is not very high. But once I start
>>> compiling something (running 'make buildworld' or 'portupgrade -a' for
>>> example), the machine comes almost unusable - X11's windows takes a lot
>>> of time to redraw, changing virtual desktop in window manager may take
>>> a several seconds. And it's nearly impossible to watch some movie with
>>> mplayer.
>>>
>> Roman,
>>
>> This is contrary to the experiences of many others. Can you send me your
>>
>
> Not in the UP case.
> My i386-core2duo with SMP kernel gives _wonderful_ responsiveness, even, with
> buildworld -j5, I absolutely don't feel any slowdown!
> But when I once accidantially installed a UP kernel,the machine was
> very "laggy", I want to say had short "freezes"
>
> I'm also wondering that inserting a CF card in my card reader stops all io for
> a second. HALd is probably the culprit, but why can the system be stopped by
> userland? Maybe unrelated to ULE though.
>
> Thanks
1. Giant lock?
2. Using pthread instead of libthread?
-Garrett
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