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On Wed, May 09, 2001 at 09:22:08PM +0200, Manuel Bouyer wrote:

> Do the scsi controllers share interrupts with other devices ?

Yes.

uhci0: interrupting at irq 10
siop1: interrupting at irq 10

But that's it, and uhci0 isn't doing much; I have no USB devices
plugged in.  ISTR that the uhci code polls a few times a second for
new devices, but it doesn't generate interrupts unless there are
devices plugged in.  I could be wrong, though.

> While testing disks speed, could you run a 'systat vm' and look at
> irq rates ?

~600 on write, ~4800 on read, for irq 10.

> Do you get decent read speed out of these disks ?

Yes.  :)  About 9 to 9.5 MB/s.

Is it normal to expect write performance to be that much worse than
read performance?  Why would I have one disk that writes as fast as it
reads?

Chris

--=20
---------------------------------------------------- chris@cjones.org
Chris Jones                                          Mad scientist at large
  www.netbsd.org www.postgresql.org www.schemers.org www.python.org

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