[8u20] RFR 8038212: Method::is_valid_method() check has performance regression impact for stackwalking

[harold seigel]

Hi Coleen,

Looks good to me, also.

Harold

On 5/21/2014 2:52 PM, Markus Grönlund wrote:
> Looks good.
>
> Thanks
> Markus
>
> -----Original Message-----
> From: Coleen Phillimore
> Sent: den 21 maj 2014 20:44
> To: hotspot-dev developers
> Subject: [8u20] RFR 8038212: Method::is_valid_method() check has performance regression impact for stackwalking
>
> Summary: Only prune metaspace virtual spaces at safepoint so walking them is safe outside a safepoint.
>
> This change has been in hs-rt for a week and backported cleanly. JFR performance in 8u20 needs this fix.
>
> open webrev at http://cr.openjdk.java.net/~coleenp/8038212_8u20/
> bug link https://bugs.openjdk.java.net/browse/JDK-8038212
>
> Thanks,
> Coleen