[rescue] SS/10 CPU Question...

[Gregory Leblanc]

Blah, sorry about the ugly formatting.  Apparently thunderbird doesn't 
quite have a cool feature yet.  Someday I'll get around to using 
Nadine's procmail/formail code to explode these things...

rescue-request at sunhelp.org wrote:
> ------------------------------------------------------------------------
> 
> Subject:
> [rescue] SS/10 CPU Question...
> From:
> Lionel Peterson <lionel4287 at yahoo.com>
> Date:
> Fri, 13 Feb 2004 08:27:06 -0800 (PST)
> To:
> rescue at sunhelp.org
> 
> To:
> rescue at sunhelp.org
> 
> 
> Hello all,
> 
> I built up my spare-parts SS/10, and it is pretty nice, but it needs
> some more disk space...
> 
> SS/10
> 1x SM71 *or* 2x Ross HS90
> 4x 64 Meg DIMMs
> 4x 16 Meg DIMMs
> 1x 1 Gig HD
> TGX+
> 
> My question is, anyone have any reson to suggest the SM71 over the dual
> HS90s (two single CPU cards)?

According to the MBUS resources page that Bill hosts...  The SM71 would 
have a "relative performance" of 217, and the total of both HS90s would 
have a relative performance of 270.  (http://mbus.sunhelp.org/modules/)

> My thoughts are that the SM71 will be under-utilized due to the buss
> speed in the SS/10, but it has a larger cache (1 Meg) than the HS90s
> (256K)...

The bus speed for either the HyperSPARC or the SuperSPARC-II will be the 
same, but I think that since you only have 1 SS module, you'll end up 
with a lot less contention.  If you had just one HS module, the SS would 
completely stomp it.  With two, it becomes a fair bit closer challenge.
HTH,
	Greg