From: "freaky" <freaky@bananateam.nl>
To: <korn-linuxkernel@chardonnay.math.bme.hu>
Cc: <linux-kernel@vger.kernel.org>
Subject: Re: 2.4 very slow memory access on abit kd7raid (kt400); ten times slower than on kg7raid
Date: Sun, 27 Oct 2002 08:39:10 +0100 [thread overview]
Message-ID: <006001c27d8b$f0a75720$1400a8c0@Freaky> (raw)
In-Reply-To: 20021027032811.GM27554@nilus-2690.adsl.datanet.hu
l> Everything slowed down. The easiest way to demontsrate this is by looking
at
> these figures:
>
> raid5: measuring checksumming speed
> - 8regs : 2343.600 MB/sec
> - 32regs : 1944.000 MB/sec
> - pIII_sse : 4163.600 MB/sec
> - pII_mmx : 3584.400 MB/sec
> - p5_mmx : 4600.800 MB/sec
> -raid5: using function: pIII_sse (4163.600 MB/sec)
> + 8regs : 228.400 MB/sec
> + 32regs : 199.200 MB/sec
> + pIII_sse : 352.000 MB/sec
> + pII_mmx : 316.800 MB/sec
> + p5_mmx : 432.800 MB/sec
> +raid5: using function: pIII_sse (352.000 MB/sec)
>
> Old motherboard above, new below. (Why it chose pIII_sse even when p5_mmx
> was faster is also an interesting question... :)
I have seen the same on a precompiled slackware 8.1 raid.s kernel I tried
for my promise controller. It's an AMD AthlonXP 2000+. Like you I found that
the PIII_SSE was slower than the P5_MMX and still got selected. I got higher
numers than you though, around your old mobo's speeds.... (KT333 chipset).
(MSI KT3 Ultra2-R). specs are in the KT333, IO-APIC, Promise Fasttak, Initrd
topic.
the 5 disks spanning ram image doesn't even load properly with me, maybe
it's caused by memory problems as well? Tho' I thought north bridges are for
memory access whilst I only get a message that my southbridge isn't
recognized...
next prev parent reply other threads:[~2002-10-27 7:33 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-27 3:28 2.4 very slow memory access on abit kd7raid (kt400); ten times slower than on kg7raid KORN Andras
2002-10-27 7:39 ` freaky [this message]
[not found] ` <20021027075346.GB29184@alpha.home.local>
[not found] ` <Pine.LNX.4.33.0210270139530.22820-100000@coffee.psychology.mcmaster.ca>
2002-10-27 13:33 ` KORN Andras
[not found] ` <Pine.LNX.4.44.0210271245430.3202-100000@pianoman.cluster.toy>
2002-10-27 18:19 ` [solved] " KORN Andras
2002-10-28 1:42 ` John Clemens
-- strict thread matches above, loose matches on Subject: below --
2002-10-27 9:16 Manfred Spraul
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