From: Dmitry Volkoff <vdb@mail.ru>
To: linux-kernel@vger.kernel.org
Subject: Re: problems with I/O performance with 2.4.12-ac3
Date: Fri, 19 Oct 2001 19:53:28 +0400 [thread overview]
Message-ID: <20011019195328.A30781@localhost> (raw)
Hi,
On my machine HDD is slow with all ac-kernels I've tried so far.
There is even more simple test -- hdparm.
2.4.12-ac3:
# hdparm -tT /dev/hda
/dev/hda:
Timing buffer-cache reads: 128 MB in 0.70 seconds =182.86 MB/sec
Timing buffered disk reads: 64 MB in 2.88 seconds = 22.22 MB/sec
2.4.13-pre3:
# hdparm -tT /dev/hda
/dev/hda
Timing buffer-cache reads: 128 MB in 0.63 seconds =203.00 MB/sec
Timing buffered disk reads: 64 MB in 1.57 seconds = 40.76 MB/sec
Same config options in both kernels. Same hardware.
# hdparm /dev/hda
/dev/hda:
multcount = 16 (on)
I/O support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
keepsettings = 1 (on)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 4865/255/63, sectors = 78165360, start = 0
This is on Athlon-1.4Ghz, chipset amd761/via8231,
IDE Seagate Barracuda ATA-IV ST340016A 40G.
Can somebody explain such results?
--
DV
next reply other threads:[~2001-10-19 15:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-19 15:53 Dmitry Volkoff [this message]
2001-10-22 12:09 ` problems with I/O performance with 2.4.12-ac3 Andrea Arcangeli
-- strict thread matches above, loose matches on Subject: below --
2001-10-19 14:30 Andrei Lahun
2001-10-19 13:27 ` safemode
2001-10-19 17:14 ` Andrei Lahun
2001-10-20 0:16 ` safemode
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