Re: SCSI performance issue

Alan Cox (alan@lxorguk.ukuu.org.uk)
Wed, 8 Sep 1999 13:05:59 +0100 (BST)


> Everything is working fine in Linux as far as access to the drives. I have
> noticed that there is not a big performance difference from my IDE drive to
> the SCSI devices. Also I expected less CPU activity due to offloading the
> i/o instructions to the controllers i/o processor. I actually have seen more
> CPU resources being used now.

This is a good sign. Previously your computer was idle a lot going "where's
the data, hello ?, look is anyone going to serve me today". Now its getting
data faster so it should be doing more faster too.

You need to benchmark some things and see if the extra CPU is the scsi overhead
or the program getting work done faster

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