>On Mon, 25 Oct 1999, Zane H. Healy wrote:
>
>> See http://anacin.nsc.vcu.edu/~jim/mvax/vax-perf.html for a full list which
>
>Thanks, that's a lovely resource!
>
>> ---- Mariah chip series(1991) - Decimal SID = 301989888--------+------------
>> 12 | 2 | 1202|13-58 | XBCD | VAX 6000 model 510-560
>>|Calypso/XMP
>>
>> So, the VAX 6000 in question is somewhere between 13-58 times as fast as a
>> VAX 11/780.
>
>Zane, if you know, how can a single processor have a 4.5 to 1 ratio on
>performance? The DEC document at http://www.digital.com/timeline/1990-4.htm
>says the 6500 was 13x a 780.
OK I think you're refering to the 13-58 number above. I believe that
refers to a 6000/510 (single processor) running at 13 VUPs, up to a
6000/560 (six processor) running at 58 VUPS. So the system in question
should be ~35 VUPS if I figure correctly.
>If so, then if people were thinking of a 58 MIPS 6500, this -certainly-
>explains the performance difference. Heck, a 58 MIPS 6500 is even faster
>than a 486DX4/100 !!!
BUT, it's NOT MIPS, it is VUPS. I don't have info on what all VUPs
measures but IIRC, it's more than just processor speed. To make matters
worse, the baseline for VUPS, SPECint92, and SPECfp92 is the VAX-11/780,
and as such a VAX-11/780 has a score of 1.0 on all three of those tests.
Of course the only SPECint/fp92 tables I can come up with don't list many
VAXen. It does list the 6000/510 though at ??? SPECint92, and 13.3
SPECfp92.
Trying to compare benchmarks is a real headache, you can get some machines
under one type of benchmark, and some more under another type, etc. While
there is a little overlap, there isn't enough.
Zane
| Zane H. Healy | UNIX Systems Adminstrator |
| healyzh_at_aracnet.com (primary) | Linux Enthusiast |
| healyzh_at_holonet.net (alternate) | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| and Zane's Computer Museum. |
|
http://www.aracnet.com/~healyzh/ |
Received on Tue Oct 26 1999 - 01:13:21 BST