Re: poor 164SX IDE drive performance, dma enabled
Just to follow up on this. I replaced the original drive that was giving
me 3MB/sec @15% cpu with a new one and am now getting 8.3MB/sec 30% cpu.
The drive with slow performance was refurbished a Maxtor 4W060H4 60gb.
The drive that performs well is a brand new SAMSUNG SV1204H 120gb.
both drives perform much better than this in an x86 PC; apparently the
samsung works better than the maxtor in the 164sx.
-g
On Sat, Nov 02, 2002 at 10:18:35AM -0800, Gregory P. Smith wrote:
> Hmm. Thanks. looking closer it appears that you're right, its only
> using 10-15% of my CPU when reading. I had assumed it was pegged based on
> some stalling behaviour i had seen doing some copies. Well thats good,
> at least its doing DMA. Disappointing performance when I see my x86
> boxes getting 10 times that but plenty for what i'm using the drive for.
>
> > the 164SX supports DMA. I have an Eiger, which also uses
> > the Contaq Cypress 693 IDE-chip. It maxes out at 3MB/s as
> > well, but doesn't eat up that much CPU. Did you compile in
> > support for the CY693? Try that. It might help. IIRC, someone
> > mentioned, that he got IDE up to 6MB/sec. It isn't that much
> > either, but still better than 3MB/s.
>
>
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