Subject: Re: slowdown with MI scsi on pmax (ds5000/200)
To: Chuck Silvers <>
From: Ken Wellsch <>
List: tech-kern
Date: 05/21/2001 09:14:02
I'm just finishing building -current on a 5000/150 but before I started,
I did my usual Bonnie run.  Apologies,  I had thought I had prior results
stashed, but this is all I have on this system:

NetBSD pmax50 1.5V NetBSD 1.5V (3MIN50) #0: Sun May 20 13:53:35 EDT 2001

sd0: 2150 MB, 4390 cyl, 8 head, 125 sec, 512 bytes/sect x 4404489 sectors
sd0: sync (200.0ns offset 15), 8-bit (5.000MB/s) transfers, tagged queueing

# bonnie -s 256
File './Bonnie.216', size: 268435456
Writing with putc()...done
Writing intelligently...done
Reading with getc()...done
Reading intelligently...done
Seeker 2...Seeker 1...Seeker 3...start 'em...done...done...done...
              -------Sequential Output-------- ---Sequential Input--
              -Per Char- --Block--- -Rewrite-- -Per Char- --Block---
Machine    MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU  /sec
          256  1245 95.2  1967 91.4  1136 34.5  1604 88.8  2558 51.6  79.9

Chuck Silvers wrote:
> you're talking about filesystem performance, whereas I'm talking about
> raw disk performance (ie. writing to /dev/rsd0h).
> about a month ago I had filesystem writes running within 1% of the NetBSD 1.5
> speed.  I'm getting close to being ready to check in those changes, but now I
> discover that raw disk access has gotten much slower in the meantime, which
> slows down filesystem performance as well.
> -Chuck