[mdlug] OT: Solaris 10 Priority Scheduling

[Aaron Kulkis]

David Lane wrote:
> Yes there the other CPU's are idle. Yet we cant get the system to give a process more CPU resources, when nothing else is happening on the system.
> 

My bet is that the process is being migrated from core to core.

Solaris has a command to bind a process to one core, although it's
been too long since I used Solaris to remember exactly what command
that is.

To find that command, try these:

man -k cpu
man -k core
man -k bind


> David C. Lane
> 
> ________________________________
> From: Aaron Kulkis <akulkis00 at gmail.com>
> To: MDLUG's Main discussion list <mdlug at mdlug.org>
> Sent: Mon, June 7, 2010 11:01:21 AM
> Subject: Re: [mdlug] OT: Solaris 10 Priority Scheduling
> 
> 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
> 
> I assume that this is on a system with ample CPU idle time
> and the I/O channels are not saturated?
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