[Beowulf] rhel page_size

Michael Di Domenico mdidomenico4 at gmail.com
Fri Jan 22 15:14:36 EST 2010


Nope, haven't gotten that far yet.  I seemed to recall (or atleast i
thought i had) that i could easily change the page size during kernel
compile.  perhaps that was way back in the day or i'm just losing it.
figured it'd be a quick easy test...  guest not... :(

On Fri, Jan 22, 2010 at 2:49 PM, Joe Landman
<landman at scalableinformatics.com> wrote:
> Michael Di Domenico wrote:
>>
>> We'd like to run an experiment and see if MAGMA will run any
>> faster/better/different with a larger page size.
>
> Larger pages will reduce TLB thrashing/pressure.  The best way to tell if
> you need it is to run performance counter tools during your program run.  If
> you haven't, you might be optimizing something which provides minimal if any
> benefit.
>
> Have you profiled the code (using any of the various tools) to see where it
> is spending its time?
>
>
> --
> Joseph Landman, Ph.D
> Founder and CEO
> Scalable Informatics Inc.
> email: landman at scalableinformatics.com
> web  : http://scalableinformatics.com
>       http://scalableinformatics.com/jackrabbit
> phone: +1 734 786 8423 x121
> fax  : +1 866 888 3112
> cell : +1 734 612 4615
>

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