RE: How are CPU Speed and Overall CPW Related?

["DeLong, Eric" <EDeLong@xxxxxxxxxxxxxxx>]

Were both systems running the same services? HTTP servers? SNADS? Domino?
SETI@home? Network servers such as DNS, POP, DHCP, MSF, etc? Both systems
using default tuning? PTFs identical? Running JAVA? 

Nathan, I do understand your wanting to figure this out, but I think there's
too many behind the scenes issues that *could* affect a machine's
performance. I'd suggest running performance monitor to get a better picture
of the real activity on the machines. 

I understand that timeslice is not as important now as it once was, but I
wonder if a CPU bound job would perform better with a larger timeslice... 

Eric DeLong

-----Original Message-----
From: Nathan M. Andelin [mailto:nathanma@haaga.com]
Sent: Thursday, May 03, 2001 9:06 AM
To: MIDRANGE-L@midrange.com
Subject: Re: How are CPU Speed and Overall CPW Related?


> From: "Leif Svalgaard" <leif@leif.org>

> The loop the program is executing is so short (about 20 instructions) that
> it doesn't matter how large the cache is. No if there is no cache at all,
> that might be different.

Let's consider the difference between the 2 systems:

170-2290:
   Processor: Northstar 200 Mhz.
   L2 Cache: N/A
   RAM: 320 MB

170-2385
   Processor: Northstar 252 Mhz
   L2 Cache: 4MB
   RAM: 1 GB

If not cache, then what would account for a performance improvement of 11
times?  Both systems were doing very little other work at the time.  The
work is entirely CPU bound.

Nathan.


+---
| This is the Midrange System Mailing List!
| To submit a new message, send your mail to MIDRANGE-L@midrange.com.
| To subscribe to this list send email to MIDRANGE-L-SUB@midrange.com.
| To unsubscribe from this list send email to MIDRANGE-L-UNSUB@midrange.com.
| Questions should be directed to the list owner/operator:
david@midrange.com
+---

+---
| This is the Midrange System Mailing List!
| To submit a new message, send your mail to MIDRANGE-L@midrange.com.
| To subscribe to this list send email to MIDRANGE-L-SUB@midrange.com.
| To unsubscribe from this list send email to MIDRANGE-L-UNSUB@midrange.com.
| Questions should be directed to the list owner/operator: david@midrange.com
+---