On Sat, 12 Feb 2005 01:47:27 +0200
Ion-Mihai Tetcu <[EMAIL PROTECTED]> wrote:
> On Tue, 8 Feb 2005 08:39:15 -0800
> Kris Kennaway <[EMAIL PROTECTED]> 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" <[EMAIL PROTECTED]> 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.
But the problem is seems there somewhere, at least `vmstat -i 1` show
98-103% busy ad0 when copying from ad2 to ad0 and the system doesn't
swap or look loaded.
Mem:KB REAL VIRTUAL VN PAGER SWAP PAGER
Tot Share Tot Share Free in out in
out
Act 326880 32656 522764 64152 34144 count
All 481012 36440 3327348 73980 pages
Interrupts
Proc:r p d s w Csw Trp Sys Int Sof Flt cow 1931 total
1 2 6102 5661 305 7295 3128 429 56 105476 wire 1: atkb
335032 act 3: sio1
10.1%Sys 2.3%Intr 5.4%User 0.0%Nice 82.2%Idl 30768 inact 4: sio0
| | | | | | | | | | 12072 cache 6: fdc0
=====+>>> 22072 free 128 8: rtc
daefr 159 12: psm
Namei Name-cache Dir-cache prcfr 13: npx
Calls hits % hits % react 57 14: ata
1686 1686 100 pdwak 51 15: ata
26 zfod pdpgs 143 16: xl0
Disks ad0 ad2 26 ofod intrn 189 22: pcm
KB/t 128 128 %slo-z 61472 buf 1204 0: clk
tps 28 26 12 tfree 41 dirtybuf
MB/s 3.46 3.21 35666 desiredvnodes
% busy 98 9 8916 numvnodes
7269 freevnodes
--
IOnut
Unregistered ;) FreeBSD "user"
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