Review Request: UseNUMAInterleaving

Igor Veresov igor.veresov at
Tue May 17 09:58:05 PDT 2011

UseNUMA already has this mechanism. If you turn it on it will deactivate 
itself if the machine is not NUMA. The problem with turning it on by 
default is that it can be not necessarily beneficial for all 
applications (however for most of them it is).


On 5/17/11 5:04 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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