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<== Date ==> <== Thread ==>

Subject: Re: frc64/frc604RT performance
From: Marty Kraimer <mrk@aps.anl.gov>
To: tech-talk@aps.anl.gov
Date: Thu, 24 Oct 1996 08:12:14 -0500
Noboru Yamamoto wrote:
> 
> Dear Colleagues,
> 
> Here is a result of EPICS benchmark (perform.db and timeMeter.adl by Marty
> Kraimer) on Force CPUs.
> 
> frc40 (MC68040 25MHz)
> scan    scanPeriod      IDLE    TOTAL
> 0.1     11.0%           70.4%   97.0%
> 
> frc64(MC68060 50MHz)
> scan    scanPeriod      IDLE    TOTAL
> 0.1     9.46%           77.9%   96.0%
> 
> frc604RT(PPC604 100MHz)
> scan    scanPeriod      IDLE    TOTAL
> 0.1     2.59%           94.9%   98.9%
> 
> Ratio of CPU performances estimated from these numbers is,
> 
>  frc40:frc64:frc604RT=1:1.3:4.1

I am not sure what should be reported but another way is % cpu
usage which is (100 - IDLE). This would give.

68040 26.8%
68060 22.1%
frc604 5.1%

Using 68040 as base and reporting as (68040 cpu)/(xxx cpu) gives

frc40:frc64:frc604RT=1:1.2:5.25

Not sure which way makes most sense but they give similar results.

I am really suprised by the 68060 numbers. Could you please
tell us the following:

For each cpu give
   a) Speed of main memory.
   b) Speed and size of cache memory.
 
Also are you sure all board support packages turned cache on?

Also is it possible to make up a small test case that just
has a loop to does an integer multiply and another loop that
does a double multiply? Make sure compiler doesnt optimize everything
away. This test should show raw cpu performance.
The database test may just be dependent on main memory speed
and size of cache.

Marty Kraimer


Replies:
Re: frc64/frc604RT performance Johnny Tang
Re: frc64/frc604RT performance KAJI Masahiro
References:
frc64/frc604RT performance Noboru Yamamoto

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