[mdlug] OT: Solaris 10 Priority Scheduling

[Dan Pritts]

you probably know this but just in case -

the ultrasparc t-series CPUs, the highly parallel ones, cores, have
limited floating-point performance.  IIRC each CPU has 8 cores, but
all 8 share a single floating-point unit.

if you're running a single copy of your benchmark on an otherwise
unloaded server, this shouldn't make any difference.

HTH

danno

On Mon, Jun 07, 2010 at 07:10:10AM -0700, David Lane wrote:
> Hi, 
> 
> 
> We are facing a challenging issue.
> 
> We have performance issueson a multi CPU server. Our benchmark (sum of square-roots 1 - 1,000,000) runs 20 sec on a a multi cpu system. Yet it runs less than a sec on a single CPU system and on my desktop. 
> 
> When we found this we started to explore scheduling priorities.
> 
> If a process is running slow and needs to run faster on Solaris, what are odd options to tweek performance?
> ?
> Where are SYS 60-99 processes assigned ?
> 
> David C. Lane
> 
> 
> 
>       
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danno
--
dan pritts
danno at umich.edu
734-929-9770