[torqueusers] cpusets in Torque 3.0, memory pressure

Grigory Shamov gas5x at yahoo.com
Wed Jun 6 22:44:57 MDT 2012


Hi David,

Thanks!

 I've tried to run some chemistry codes,  under Torque 3, with and without oversubscription for memory. It seems to work. The pressure  can quickly spike up to, say, 13000 with quite moderate swapping.

If there are more than one jobs on the node, and one of them oversubscribes, would it create pressure for all the jobs there?

--
Grigory Shamov


--- On Mon, 6/4/12, David Beer <dbeer at adaptivecomputing.com> wrote:

From: David Beer <dbeer at adaptivecomputing.com>
Subject: Re: [torqueusers] cpusets in Torque 3.0, memory pressure
To: "Torque Users Mailing List" <torqueusers at supercluster.org>
Date: Monday, June 4, 2012, 7:27 AM



On Sun, Jun 3, 2012 at 7:47 AM, Grigory Shamov <gas5x at yahoo.com> wrote:

Dear David,

Thanks a lot for your  answer! 
What would be a good starting value for the memory pressure threshold, to configure it right? 

I think 1000 is a good starting value.

David
 

--Grigory Shamov


--- On Fri, 6/1/12, David Beer <dbeer at adaptivecomputing.com> wrote:


From: David Beer <dbeer at adaptivecomputing.com>
Subject: Re: [torqueusers] cpusets in Torque 3.0, memory pressure

To: "Torque Users Mailing List" <torqueusers at supercluster.org>
Date: Friday, June 1, 2012, 1:07 PM




On Fri, Jun 1, 2012 at 11:57 AM, Grigory Shamov <gas5x at yahoo.com> wrote:


Hi,



The Torque 3 changelog says " when cpusets are configured and memory pressure enabled, add the ability to check memory pressure for a job. Using $memory_pressure_threshold and $memory_pressure_duration in the mom's config, the admin sets a threshold at  which a job becomes a problem".





Does it work for non-NUMA setup as well? I mean, if I configure it with --enable-cpusets only, but --disable-numa-support ?



Grigory,
As long as you set your cpuset up correctly (http://www.adaptivecomputing.com/resources/docs/torque/3-0-3/a.cmomconfig.php) it will work with or without numa support.


David 
--

Grigory Shamov

HPC Analyst,

University of Manitoba









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-- 
David Beer | Software EngineerAdaptive Computing


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