[mdlug] OT: Solaris 10 Priority Scheduling

[David Lane]

so with 24 cores can you set a side say 4 cores for a few server tasks?




________________________________
From: Aaron Kulkis <akulkis00 at gmail.com>
To: MDLUG's Main discussion list <mdlug at mdlug.org>
Sent: Mon, June 7, 2010 11:30:47 AM
Subject: Re: [mdlug] OT: Solaris 10 Priority Scheduling

Aaron Kulkis wrote:
> 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
> 


It appears to be the command "pbind"

<http://www.google.com/search?q=solaris+bind+process+cpu+OR+core&start=0&start=0&ie=utf-8&oe=utf-8&client=mozilla&rls=org.mozilla:en-US:unofficial>


> 
>> 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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