Date: Sat, 6 Oct 2007 12:21:13 +0200 From: Marc Fonvieille <blackend@freebsd.org> To: Jeff Roberson <jroberson@chesapeake.net> Cc: current@freebsd.org Subject: Re: ULE/yielding patch for testing. Message-ID: <20071006102113.GC976@gothic.blackend.org> In-Reply-To: <20071006074429.GB976@gothic.blackend.org> References: <20071002165007.D587@10.0.0.1> <20071006074429.GB976@gothic.blackend.org>
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On Sat, Oct 06, 2007 at 09:44:29AM +0200, Marc Fonvieille wrote: > On Tue, Oct 02, 2007 at 04:53:33PM -0700, Jeff Roberson wrote: > > Enclosed is a patch that does two things: > > > > 1) Reduces UP context switch time by over 10% making it faster than 4BSD > > on UP. On SMP it's hard to compare since ULE can do as many as 30x as many > > switches per second on my 8way system. > > > > 2) Restores old sched_yield() behavior from 6.x. This was changed in > > -current unintentionally I think. > > > > I'd appreciate any extra testing. The ULE context switch time improvements > > required some changes to the frequency that we recalculate priorities. I'm > > mostly interested in hearing whether this causes any regression in normal > > workloads. > > > > [tested with _ULE] > > This seems to help a bit the things for me (desktop use during > compilations). But 6.X is still faster, i.e, less lags and less jerky > mouse movements during port builds. > Thanks for spending time improving things, I really appreciate it. > After more testing, the lag problem is caused by the use of firefox. Once I try to open a heavy webpage, both firefox and Xorg become slow, the rest is fine. By the "rest" I mean: audacious playing mp3s, wget and ncftp downloading huge (100MB) files, compiling wine and aMule running. -- Marc
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