[mdlug] OT: Solaris 10 Priority Scheduling

[Michael ORourke]

David,

Not exactly an answer to your question, but I came across this page and thought it might be of some help.
http://www.c0t0d0s0.org/archives/4207-Less-known-Solaris-Features-Resource-Management-Part-4-Limiting-CPU-usage.html

-Mike

-----Original Message-----
>From: David Lane <dcl400m at yahoo.com>
>Sent: Jun 9, 2010 1:23 PM
>To: MDLUG's Main discussion list <mdlug at mdlug.org>
>Subject: Re: [mdlug] OT: Solaris 10 Priority Scheduling
>
>What I'm looking for now is getting the process to have more CPU resources.
>
>How/Where would I assign a SYS 80 to a process?
>
>David C. Lane 
>
>
>
>________________________________
>From: Dan Pritts <danno at umich.edu>
>To: MDLUG's Main discussion list <mdlug at mdlug.org>
>Sent: Tue, June 8, 2010 11:49:20 PM
>Subject: Re: [mdlug] OT: Solaris 10 Priority Scheduling
>
>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
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