Subject: Re: High interrupt CPU usage with amanda backup on a SPARCclassic
To: Francis Devereux <>
From: Manuel Bouyer <>
List: port-sparc
Date: 02/08/2003 16:26:21
On Thu, Feb 06, 2003 at 09:55:36PM +0000, Francis Devereux wrote:
> Hi,
> I have a SPARCclassic that I am using as an amanda backup server.  It has an
> external 1GB SCSI disk and HP C1537A DDS-3 tape drive.  It is running NetBSD
> 1.6.
> When the amanda is backing up over the network the CPU usage is very high
> (see top output below), mainly interrupt and system, and the tape keeps
> stopping and starting.  Is this normal, or is there any way I can make the
> backup go faster?

I fear you can't really get it go faster, the CPU on the classic isn't that
profiling the kernel to see in which interrupt handler it's spending that
much time may give interresting info, though.

Manuel Bouyer <>
     NetBSD: 24 ans d'experience feront toujours la difference