RFR: 8079315: UseCondCardMark broken in conjunction with CMS precleaning

Vitaly Davidovich vitalyd at gmail.com
Tue May 5 15:02:51 UTC 2015


I realize this is a correctness fix, but isn't this going to possibly
defeat any perf gain from using conditional card marking in the first place
(for CMS)? Didn't someone suggest a different approach that allows
store-store to be used still?

On Tue, May 5, 2015 at 10:52 AM, Andrew Haley <aph at redhat.com> wrote:

> I've added StoreLoad barriers everywhere they're needed.
> http://cr.openjdk.java.net/~aph/8079315/
> This patch depends on the patch for 8078438, which is still not
> committed.  http://cr.openjdk.java.net/~shade/8078438/webrev.02/
> This is x86 only, will do AArch64 parts in a separate patch once
> we've agreed on this.
> Andrew.

More information about the hotspot-dev mailing list