Date: Wed, 3 Oct 2007 18:33:50 +0200 From: Marc Fonvieille <blackend@freebsd.org> To: Jeff Roberson <jroberson@chesapeake.net>, freebsd-current@freebsd.org, Roman Bogorodskiy <novel@freebsd.org> Subject: Re: SCHED_ULE on desktop system Message-ID: <20071003163350.GA2449@gothic.blackend.org> In-Reply-To: <20071002190208.GA94380@abigail.blackend.org> References: <20070916061932.GA93480@underworld.novel.ru> <20070918061806.GA85425@blazingdot.com> <20070918004027.G558@10.0.0.1> <20071001101525.GA1530@gothic.blackend.org> <20071001112845.N583@10.0.0.1> <20071001185454.GA72080@abigail.blackend.org> <20071002010703.D6669@10.0.0.1> <20071002190208.GA94380@abigail.blackend.org>
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On Tue, Oct 02, 2007 at 09:02:08PM +0200, Marc Fonvieille wrote: > On Tue, Oct 02, 2007 at 01:07:57AM -0700, Jeff Roberson wrote: > > >I tried with _4BSD and it gives the same behavior (I even downgraded > > >Xorg to 7.2). Renicing X does not really help. > > > > > >I use nvidia or nv driver (nvidia one is a bit less worse). The lag can > > >even appears with 4% of CPU usage according to top(1). > > >Thanks to your remarks and my tests, I'm now sure it's scheduler > > >independent. It seems 7-CURRENT is slower than 6.X regarding I/O :( > > >For info the box is a 1.2GHz Athlon with 1GB of RAM and swap is never > > >used. > > > > Can you try with ULE and the attached diff? sched_yield() behavior > > changed between 6.x and 7-CURRENT. This has been referenced in other bug > > reports. Please let me know if this helps. > > > > Ok, I'm going to test with your patch. > No noticeable difference :( I'll try with the patches set you posted today. -- Marc
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