[linux-cirrus] Re: IDE throughput
- From: Michael Burian <dynmail1@xxxxxxxxxxxxxxxxx>
- To: linux-cirrus@xxxxxxxxxxxxx
- Date: Wed, 27 Jul 2005 17:13:47 +0200
Cory T. Tusar wrote:
> Does anyone have any empirical evidence as to the ep93xx IDE throughput
> available using the latest linux-cirrus-2.6.x kernel?
I'm using the kernel I'm currently working on (
linux-2.6.12-ep93xx-something ) ide parts have not been touched for
a while, so it should be pretty identical to the stuff already available
as patch on my homepage.
> Something along
> the lines of 'time dd if=bigfile of=/dev/hda'?
>
> I realize that DMA is not (yet) functional;
yes
> I assume PIO modes 0-4 all
> work though?
>
haven't tested, just used the default
> Just trying to get a handle on an upcoming project. Thanks for any and
> all input.
edb9312:~# hdparm -t -T /dev/hda
/dev/hda:
Timing cached reads: 148 MB in 2.03 seconds = 72.91 MB/sec
Timing buffered disk reads: 6 MB in 4.38 seconds = 1.37 MB/sec
on ext3 fs
edb9312:~# time dd if=/dev/zero of=100M bs=1M count=100; time sync
100+0 records in
100+0 records out
104857600 bytes transferred in 76.000303 seconds (1379700 bytes/sec)
real 1m16.054s
user 0m0.010s
sys 0m35.570s
real 0m4.324s
user 0m0.010s
sys 0m0.720s
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