Date: Sat, 12 Feb 2005 01:47:27 +0200 From: Ion-Mihai Tetcu <itetcu@people.tecnik93.com> To: Kris Kennaway <kris@obsecurity.org> Cc: freebsd-stable@freebsd.org Subject: Re: ULE status Message-ID: <20050212014727.39fc2d14@it.buh.tecnik93.com> In-Reply-To: <20050208163915.GC43054@xor.obsecurity.org> References: <Pine.BSO.4.56.0502081306440.28295@ux11.ltcm.net> <200502081333.08964.michaelnottebrock@gmx.net> <4253.213.222.48.10.1107866717.squirrel@mailgw.icon.bg> <20050208155822.29df9373@it.buh.tecnik93.com> <20050208163915.GC43054@xor.obsecurity.org>
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On Tue, 8 Feb 2005 08:39:15 -0800 Kris Kennaway <kris@obsecurity.org> wrote: > On Tue, Feb 08, 2005 at 03:58:22PM +0200, Ion-Mihai Tetcu wrote: > > On Tue, 8 Feb 2005 14:45:17 +0200 (EET) > > "Viktor Ivanov" <v0rbiz@icon.bg> wrote: > > [ ... ] > > > On the other hand, using SCHED_ULE improves sound quality and general > > > system 'response' concerning GUI... don't know 'bout performance. > > > > By any chance does it help with copying from ata disks on different > > controllers ? For me on large files this brings up "swap_pager: > > indefinite wait buffer" with 4BSD. > > That doesn't sound like a scheduler problem, rather a hardware or ata > driver problem. Did you try sos' new driver yet? Well, I'm running my desktop with an ULE kernel now, snippets bellow: options SCHED_ULE # ULE scheduler options ADAPTIVE_GIANT # Giant mutex is adaptive. options HZ=1200 options INVARIANTS # Enable calls of extra sanity checking options INVARIANT_SUPPORT # Extra sanity checks of internal structures, # required by INVARIANTS options WITNESS # Enable checks to detect deadlocks and cycles options WITNESS_SKIPSPIN # Don't run witness on spinlocks for speed and # sysctl debug.witness debug.witness.skipspin: 1 debug.witness.trace: 1 debug.witness.kdb: 0 debug.witness.watch: 0 And while I don't see may improvements in general operation, at least this problem is gone. I still get a few seconds pauses in sound and switching between app in X is sluggish while copying large files, but at least I don't get swap pager complains and I'd say there's a 3x responsiveness improvement. I didn't test ata patches yet, just to take one step at the time. -- IOnut Unregistered ;) FreeBSD "user"
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