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

[Vladimir Kozlov]

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.
>