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From: as@prg.ox.ac.uk (Andrew Stevens)
Newsgroups: comp.sys.acorn
Subject: ARM-3 benchmarks
Message-ID: <1694@culhua.prg.ox.ac.uk>
Date: 8 May 91 09:36:07 GMT
Sender: news@prg.ox.ac.uk
Reply-To: as@prg.ox.ac.uk (Andrew Stevens)
Organization: Oxford University Computing Laboratory, UK
Lines: 37


Dave Redman obtains the following results for Dhrystone (2.1?)
benchmarks.

>       Machine         Dhyrstones per sec
>        ARM2            5289
>        ARM3 @ 25Mhz    14883
>        SUN3/60         2888
>        SUN/Spark1      8000
>        SUN/Spark2      16000

The ARM results are exactly in line with what I've observed but
I am *amazed* at the low figures for the SUN machines.   I am
sure the SS1 does much more than 8000 dhrystones.  I think 18000
is much nearer the mark - but I don't recall the last benchmark
postings. Certainly I don't believe 8000 - the thing clocks at
20Mhz and has a fair sized cache.  Furthermore, I have never known
it to run *anything* slower than my 30Mhz ARM3 A410.  In fact things
typically seem to run around 50 per cent faster (unless you do
lots of 32x32 integer multiplies :-) ). I guess this is
probably due to faster main memory.   The SS2 is approximately
twice as fast again, an ARM-3 A4x0 simply isn't in the same ballpark.
The SUN 3/60 (25Mhz 68020) when I observe it chugs along somewhere between
ARM2 and ARM3 A4x0's. 2900 dhrystones is more SUN3/50 or Macintosh-II
territory.

Can anyone shed any light on Dave's mysterious results?




		
        Andrew Stevens                  
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