Review Request: UseNUMAInterleaving

Paul Hohensee paul.hohensee at oracle.com
Tue May 17 05:25:22 PDT 2011


Widening to GC group.

Paul

On 5/17/11 8:04 AM, Paul Hohensee wrote:
> I believe you can get memory geometry info from Solaris on both sparc 
> or intel.
> Don't know about Windows or Linux.  Anyone??
>
> Paul
>
> On 5/17/11 5:12 AM, Andrew Haley wrote:
>> On 17/05/11 00:18, Paul Hohensee wrote:
>>
>>> I suggest you just use -XX:+UseNUMA rather than adding a new
>>> flag. UseNUMA seems generic enough to cover whatever implementation
>>> is best on a particular platform.
>> Indeed.  I am worried by the proliferation of command-line
>> optimization flags that have obscure meanings that are difficult to
>> understand by anyone unfamiliar with a particular computer
>> architecture.  This sort of tweakage might be mostly used by people
>> doing benchmarking.
>>
>> When should this flag *not* be used?  To make it more useful, is it
>> possible to make any of this the default?  Can a system where it is
>> advantageous be autodetected?
>>
>> Andrew.


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