RFR (XL): JDK-8086706 Parallel Full GC for CMS

Martijn Verburg martijnverburg at gmail.com
Mon Aug 3 21:06:14 UTC 2015


We'd certainly like to see a JEP for this.  There are use cases where CMS
is the right collector and this proposed patch could (I'll stress could)
significantly improve its performance.

Cheers,
Martijn

On 3 August 2015 at 19:53, Jon Masamitsu <jon.masamitsu at oracle.com> wrote:

> Jungwoo,
>
> As you can see no one has stepped up to do your review.
> We’ve talked about it amongst the active GC committers.
> It’s a large change and would require a very significant
> commitment of anyone’s time.  As is obvious, our focus
> is on G1.  And right now we’re in the position of having to
> push tasks we’ve long planned for JDK 9 out into a JDK 9
> update.  No one I’ve talked with is willing to push off more
> of our G1 work to get this patch in.  And as maintainers
> of the HotSpot GC's due diligence is required of us before
> we can accept this change.
>
> Jon
>
> PS.  I saw that you said you had started another thread for this
> discussion (or maybe the discussion of the JEP) but I could not
> it.    Please feel free to repost this under the new subject.
>
> On 06/27/2015 05:48 PM, Jungwoo Ha wrote:
>
> Sorry for the long wait. So many things have cleaned up on JDK9.
> Here is the webrev against jdk9/hs-rt.
> http://cr.openjdk.java.net/~jwha/8086706/webrev.jdk9.00
>
> I am preparing for the JEP doc.
>
>
> On Thu, Jun 11, 2015 at 12:31 PM, Kim Barrett <kim.barrett at oracle.com>
> wrote:
>
>> On Jun 11, 2015, at 12:33 PM, Volker Simonis <volker.simonis at gmail.com>
>> wrote:
>> >
>> > Hi,
>> >
>> > if nobody has already started doing it, I'll try to forward port the
>> > patch to jdk9/hs-gc/hotspot.
>>
>> You’ll want to use jdk9/hs-rt rather than jdk9/hs-gc.
>>
>>
>>
>
>
> --
> Jungwoo Ha | Java Platform Team | jwha at google.com
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.openjdk.java.net/pipermail/hotspot-gc-dev/attachments/20150803/a272484d/attachment.html>


More information about the hotspot-gc-dev mailing list