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

Subject: Re: mv177
From: [email protected] (Ned Arnold)
To: [email protected]
Cc: [email protected]
Date: Thu, 25 Jun 1998 16:05:29 -0500
> We are considering buying an "mv177" rather than "mv167"
> for one of the systems in our project.
> 
> Are there any issues that I should be aware of running
> EPICS under vxWorks 5.2 on the "mv177"?
> 
> Presumably we will need a new BSP. Does the same cross-compiler
> work for both boards - i.e. could you load a "167" image on
> the "177"?

We are using a few MVME177's as direct replacements. Yes you need a new BSP.
With EPICS R3.13, just add 

CROSS_COMPILER_TARGET_ARCHS = mv167 mv177        in config/CONFIG

and 

ARCH = mv177           in iocBoot/iocName/Makefile

and let the Makefiles do their magic.


At APS, MV177's don't seem to boot from fast solaris machines, we have to
specify a boot host that's running sunOs. This has not been a problem at 
PPL, however, where they are running a later version of Solaris and vxWorks
5.3.
 
> 
> Does anyone have speed comparisons between the two?

In my application, the mv177 accomplished the image processing algorithms in 
a little less than half the time it took the 167 .... see below :

6/15/98   Using MV200support.c with edits up to 6/12 on an mv167 
          calculating both X & Y ...
      
          No plots, No text  -    Total Field Process Time =  14725 usec
          No plots, text update - Total Field Process Time =  33153 usec
          Plots, No text -        Total Field Process Time =  27246 usec
          Plots, text -           Total Field Process Time =  45281 usec


          Using MV200support.c with edits up to 6/12 on an mv177 
          calculating both X & Y ... (also fixed mv167-timer.c)
      
          No plots, No text  -    Total Field Process Time =   7166 usec
          No plots, text update - Total Field Process Time =  14701 usec
          Plots, No text -        Total Field Process Time =  12053 usec
          Plots, text -           Total Field Process Time =  19706 usec




	Ned
	

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