[rescue] SS5 mobo

[Kevin Loch]

Bill Bradford wrote:
> On Wed, Mar 03, 2004 at 11:25:30AM -0500, Kevin Loch wrote:
> 
>>It's been a long time and I diddn't do any memory specific tests but I 
>>do remember only ftp transfers maxing out at 2.5-5 Megabytes/sec on a
>>ss5-110 regardless of the network interface (even with localhost).
>>Is the OS really that inefficient?
> 
> 
> Perhaps this was disk I/O?
> 

It was a long time ago but I did the tests with
files from/to /tmp using tmpfs.

Another interesting benchmark is dd if=/dev/zero
of=/dev/null.  Solaris dd doesn't report throughput
but *bsd does.  One thing I have noticed is a
dramatic difference between bs=1024 and bs=10240
regardless of OS flavor or machine type.  I
expect less overhead with the large block size
but not this dramatic:

(ss20 hs150, NetBSD 1.6.1):

% dd if=/dev/zero of=/dev/null bs=1024 count=10240
10240+0 records in
10240+0 records out
10485760 bytes transferred in 0.671 secs (15627064 bytes/sec)

% dd if=/dev/zero of=/dev/null bs=10240 count=10240
10240+0 records in
10240+0 records out
104857600 bytes transferred in 1.203 secs (87163424 bytes/sec)

(AthalonXP 2800+ FreeBSD 5.2.1):

% dd if=/dev/zero of=/dev/null bs=1024 count=102400
102400+0 records in
102400+0 records out
104857600 bytes transferred in 0.300071 secs (349442631 bytes/sec)

% dd if=/dev/zero of=/dev/null bs=10240 count=102400
102400+0 records in
102400+0 records out
1048576000 bytes transferred in 0.485469 secs (2159924306 bytes/sec)