RFR(XXS): 8027454: Do not traverse string table during G1 remark when treating them as strong roots during initial mark

[Bengt Rutisson]

Looks good.

Bengt


On 1/10/14 10:34 AM, Thomas Schatzl wrote:
> Hi all,
>
>    could I have some reviews for the following tiny change?
>
> It disables string table unlink in the G1 remark pause. This is not
> required as G1 initial mark treats them as strong roots always.
>
> This needs to be changed again as soon as class unloading during
> concurrent mark is implemented, but for now it gives a performance boost
> about 10-15% of the remark pause across many applications.
>
> It is based on the recently posted RFR for JDK-8027476.
>
> Webrev:
> http://cr.openjdk.java.net/~tschatzl/8027454/webrev/
>
> bugs.sun.com:
> https://bugs.openjdk.java.net/browse/JDK-8027454
>
> Testing:
> jprt, FMW apps, specjbb2005, specjbb2013, dacapo, and lots
> of other testing in the recent months
>
> Thanks,
>    Thomas
>
>
> Thanks,
>    Thomas
>