Review request (S): 7179517 Enable NUMA by default on NUMA hardware

[Vladimir Kozlov]

That question was not for you but for Jesper.

Vladimir

Eric Caspole wrote:
> I am hoping one of you guys can do it - I have never used Solaris and I 
> don't know if there is any special thing to take into account there.
> 
> 
> On Jul 2, 2012, at 12:07 PM, Vladimir Kozlov wrote:
> 
>> Why there is no changes for Solaris?
>>
>> Vladimir
>>
>> On 7/2/12 3:57 AM, Jesper Wilhelmsson wrote:
>>> Hi,
>>>
>>> This change is to turn on UseNUMA per default on NUMA hardware. It 
>>> has been contributed by Eric Caspole. I'm fine with
>>> the change but we need at least one official reviewer.
>>>
>>> Webrev:
>>> http://cr.openjdk.java.net/~jwilhelm/7179517/webrev/
>>>
>>> Testing:
>>> I ran it through JPRT and did some local sanity testing.
>>> Eric has tested this on SPECjbb2005 and SPECjvm2008 with a variety of 
>>> heap sizes and it is never worse than the current
>>> default. In some cases, especially with Windows, running a test with 
>>> the current default and getting bad NUMA placement
>>> will be about 3x slower than the +UseNUMA score.
>>>
>>> The performance team are involved to perform some larger scale testing.
>>>
>>
> 
>