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. I attached iostat results with 2 ports builds and firefox trying to load (very slowly) a webpage with jerky mouse mouvements. This is with vanilla ULE. -- Marc
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