Re: AS400 processor speed

[mcrump@xxxxxxxxxxxxxx]

Allen,

The MHz rating of the processor in the 620-2181(Apache chip based system first
available 3Q 1997) is 100MHz with a 1MB L2 cache   CPW (Commercial Processing
Workload) is a number to be used for internal AS/400 to AS/400 comparisons
(relative system performance).  It is meant for quick comparisons.  Personally,
when upgrading from system to system I have found the numbers to be accurate (ie
a little conservative).

I think this is one of the official definitions of CPW 'Relative system
performance measurements (CPW values) are based on AS/400 environment,
commercial processing workload (CPW). The CPW workload is representative of
commercial applications, particularly those that do significant database
processing in conjunction with journaling and commitment control. The CPW
workload is measured on maximum configurations. CPW values may not be realized
in all environments.'

IBM has a white paper around somewhere that discusses this.  Personally, once I
got past the transition from RAMP-C to CPW I haven't given it much thought.

I'm sure the 100MHz rating seems dog slow but please remember that speed rating
is probably the most abused comparison of performance capabilities.  Your 2181
probably has a 100+ co-processors assisting the CPU in getting the job done.
Internally, I typically refuse to let anyone know what the MHz is of the
processor.

Michael Crump
Ball-Foster Glass Container Co.



|--------+----------------------->
|        |          "Allen       |
|        |          Overeem"     |
|        |          <AOvereem@stv|
|        |          gb.org>      |
|        |                       |
|        |          03/06/00     |
|        |          03:05 PM     |
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  |       cc:     (bcc: Mike Crump/IS/Ball-Foster)                |
  |       Subject:     AS400 processor  speed                     |
  >---------------------------------------------------------------|





Does anyone out there know the megahertz rating of a model 9406 620 feature
2181. The manual says 210.0 CPW. What kind of a comparison is this? TIA

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