JEP 189: Shenandoah: An Ultra-Low-Pause-Time Garbage Collector (original) (raw)

Christine Flood chf at redhat.com
Fri Jan 17 22:00:05 UTC 2014

I stopped working on GC after the G1 paper was published. Can you elaborate on the issues you have with G1 on PowerPC machines?

Our algorithm should work if you have a dependable CAS instruction.

I will ask about access to a PowerPC machine.

Christine

----- Original Message -----

From: "Volker Simonis" <volker.simonis at gmail.com> To: "Roman Kennke" <rkennke at redhat.com>, chf at redhat.com Cc: "Hotspot-Gc-Dev" <hotspot-gc-dev at openjdk.java.net> Sent: Friday, January 17, 2014 4:09:40 PM Subject: Re: JEP 189: Shenandoah: An Ultra-Low-Pause-Time Garbage Collector

Hi Roman, Christine, I'm really looking forward to hear your talk about Shenandoah on FOSDEM. But now that you already asked for questions: Will you design the new collector with weak memory model architectures in mind. I know that it is hard if you don't have the corresponding hardware but I think RedHat should at least have access to some decent PowerPC machines and I would strongly advise you to test there thoroughly from the very beginning. We had (and still have) a lot of problems with G1 on these architectures. Regards, Volker On Fri, Jan 17, 2014 at 8:28 PM, Roman Kennke <rkennke at redhat.com> wrote: > Hi there, > > Sorry being so silent... we are very happy that the Shenandoah JEP has > finally been posted and would welcome any comments, questions, > discussion from the community. > > Cheers, > Roman > > Am Mittwoch, den 15.01.2014, 11:49 -0800 schrieb > mark.reinhold at oracle.com: >> Posted: http://openjdk.java.net/jeps/189 >> >> - Mark > >

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