From: Chris Evans <chris@scary.beasts.org>
To: Roger Larsson <roger.larsson@norran.net>
Cc: linux-mm@kvack.org
Subject: Re: 2.4.0test9 vm: disappointing streaming i/o under load
Date: Wed, 11 Oct 2000 23:46:19 +0100 (BST) [thread overview]
Message-ID: <Pine.LNX.4.21.0010112341550.11841-100000@ferret.lmh.ox.ac.uk> (raw)
In-Reply-To: <39E4E543.8A4EB3BF@norran.net>
On Thu, 12 Oct 2000, Roger Larsson wrote:
> Hi,
>
> (you do have DMA enabled...)
Oh yes (discovering that in fact my chipset is only UDMA33 in the
process).
> I have tested throughput - new kernels are rather good.
I don't doubt it. I'll try and post some numbers on this later.
> I have also tested latency stuff in test9 - I have not
> seen any thing as bad as your results.
> But my audio apps runs with high priority...
>
> To be able to determine the cause
> Try to to renice your audio deamon (and audio clients)
> renice -10 <pid>
>
>
> Did it become better?
Not noticeably :-(
Perhaps I'm just asking too much, booting with mem=32M. No point testing
the new VM with a 128Mb desktop, though; it wouldn't break a
sweat!
2.2 (RH7.0 kernel) does skip less, though, and the duration of skip is
less.
Perhaps the two kernels have different elevator settings?
Cheers
Chris
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next prev parent reply other threads:[~2000-10-11 22:46 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200010090419.e994JQT09775@trampoline.thunk.org>
2000-10-10 20:53 ` Updated 2.4 TODO List Rik van Riel
2000-10-11 0:06 ` 2.4.0test9 vm: disappointing streaming i/o under load Chris Evans
2000-10-11 11:38 ` Eric Lowe
2000-10-11 20:59 ` Chris Evans
2000-10-11 22:10 ` Roger Larsson
2000-10-11 22:46 ` Chris Evans [this message]
2000-10-13 16:57 ` Rik van Riel
2000-10-11 18:38 ` Updated 2.4 TODO List tytso
2000-10-11 23:52 ` [RFC] atomic pte updates for x86 smp Ben LaHaise
2000-10-12 0:09 ` Linus Torvalds
2000-10-12 4:03 ` Benjamin C.R. LaHaise
2000-10-12 4:06 ` David S. Miller
2000-10-12 4:31 ` Cort Dougan
2000-10-12 4:37 ` Benjamin C.R. LaHaise
2000-10-12 6:42 ` Linus Torvalds
2000-10-12 8:13 ` Ingo Molnar
2000-10-12 8:56 ` David S. Miller
2000-10-12 10:05 ` Ingo Molnar
2000-10-12 11:10 ` Ingo Molnar
2000-10-12 15:10 ` Benjamin C.R. LaHaise
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