Date: Sun, 7 Oct 2007 05:00:05 -0700 (PDT) From: Jeff Roberson <jroberson@chesapeake.net> To: Marc Fonvieille <blackend@freebsd.org> Cc: Garrett Cooper <youshi10@u.washington.edu>, Benjamin Close <Benjamin.Close@clearchain.com>, current@freebsd.org Subject: Re: ULE/yielding patch for testing. Message-ID: <20071007045911.Y912@10.0.0.1> In-Reply-To: <20071007095408.GA997@gothic.blackend.org> References: <20071002165007.D587@10.0.0.1> <20071006074429.GB976@gothic.blackend.org> <20071006102113.GC976@gothic.blackend.org> <47077951.5030906@clearchain.com> <4707866F.7030605@FreeBSD.org> <20071006143141.GD976@gothic.blackend.org> <4707CF8D.3070303@u.washington.edu> <20071006191014.GB84780@abigail.blackend.org> <20071007012049.S912@10.0.0.1> <20071007013342.D912@10.0.0.1> <20071007095408.GA997@gothic.blackend.org>
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On Sun, 7 Oct 2007, Marc Fonvieille wrote: > On Sun, Oct 07, 2007 at 01:35:50AM -0700, Jeff Roberson wrote: >>>> [...] >>>> Not really when the slowness does not exist with 6.X. >>> >>> I have experienced certain websites causing firefox to slow down >>> considerably. When I mouse over firefox the mouse begins to jerk as well >>> but when I move back away from firefox it seems fine again. I suspected >>> it was an x/firefox bug. >> >> Actually I double-checked this case with dailytech.com. It seems to be >> spending all of the cpu time in user-space in xwindows. So it seems that >> it is the new xwindows that has the problem. If you watch the 'TIME' field >> of top you can see that very little cpu time is attributed to firefox and >> quite a lot to X windows. So the windowing system is too busy to redraw >> mouse events even if we are scheduling it well. >> > > You mean Xorg 7.2 or 7.3 with -CURRENT? > Currently I observe the problem with Xorg 7.2 or 7.3 under -CURRENT, > when Xorg 7.2 with 6.2-STABLE is Ok (I did not try with Xorg 7.3 on > -STABLE, but I'm quite sure I'll end to same result). > On a completly different machine (a more recent one with a 2.8GHz > Celeron), the problem could be less obvious cause of the machine speed > but I can notice the difference between 6.2-STABLE and 7-CURRENT with > any Xorg version. Can you give a dozen lines of 'vmstat 1' output while rendering this page in 7.0 and 6.2? Thanks, Jeff > >> Jeff >> >>> >>> Although I also sometimes observe mysql hanging for a period of a half >>> second or so while running sysbench. I wonder if we don't have a >>> threading library bug? I know I observed this prior to the thread_lock >>> work so hopefully I didn't break it. >>> > > I think a lot of people missed that problem cause they run fast > machines. For me it's very difficult to track down the issue cause I'm > ignorant in these OS areas and the various logs and tools don't give > obvious information. > > -- > Marc >
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