Date: Wed, 17 Oct 2007 11:01:03 +0200 From: Bengt Ahlgren <bengta@sics.se> To: "[LoN]Kamikaze" <LoN_Kamikaze@gmx.de> Cc: freebsd-current@freebsd.org, freebsd-stable@freebsd.org Subject: Re: SCHED_4BSD in RELENG_7 disturbs workflow Message-ID: <uh7tzoq9kts.fsf@P142.sics.se> In-Reply-To: <47150D87.3070804@gmx.de> (LoN_Kamikaze@gmx.de's message of "Tue, 16 Oct 2007 21:14:15 %2B0200") References: <47150D87.3070804@gmx.de>
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"[LoN]Kamikaze" <LoN_Kamikaze@gmx.de> writes: >>>From my perspective scheduling on RELENG_6 was way better. Even on a full > workload like a portupgrade the focused application (both in X and on the > console) always received enough cycles to run smoothly and applications that > ran in background like audio players also kept on running fine. > > Quite the contrary on RELENG_7. During a portupgrade or even worse 'pkgdb -L' > (recovering lost dependencies) audio players (both graphical and mplayer) > scatter, either because they don't get the hard-disk or CPU-cycles (which one, > I don't know) and the focused application also often hangs. It just looks like > occasionally (under load) everything freezes for a second and then goes on > relatively normal. Do you have ATA write-caching on or off? My experience is that if you turn caching off (on RELENG_6_x at least, have not tried 7) the machine often freezes for seconds when you are writing a lot to the disk. Bengt
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