Parallel Scavenge: algorithm ParallelOldGC

[Dang Nhan Nguyen]

Hi Tao,

The Patent seems to cover the scavenge algorithm, not the parallel mark-compact algorithm that I asked.

Cheers,
/Nhan
________________________________________
From: hotspot-gc-dev-bounces at openjdk.java.net [hotspot-gc-dev-bounces at openjdk.java.net] on behalf of Tao Mao [tao.mao at oracle.com]
Sent: Saturday, February 02, 2013 2:34 AM
Cc: hotspot-gc-dev at openjdk.java.net
Subject: Re: Parallel Scavenge: algorithm ParallelOldGC

Hi Nguyen,

The fundamentals should be covered by a then-Sun patent.
http://www.google.com/patents/US6199075

Cheers,
Tao

On 2/1/2013 3:51 PM, Jon Masamitsu wrote:
> Are you asking which hotspot source code is
> used when UseParallelOldGC is turned on?
> Or are you asking for a description of the
> algorithm?  Actually, the answer to both is
>
> share/vm/gc_implementation/parallelScavenge/psParallelCompact.*
>
> I'm not aware of any publications on the specific
> algorithm we used.  Comments in the header file
> are all I know about.
>
> Jon
>
> On 1/30/2013 6:43 AM, Dang Nhan Nguyen wrote:
>> Hi all,
>>
>> I would like to ask about Parallel Scavenge GC:
>> Which parallel mark-compact algorithm is used for the old generation
>> in Parallel Scavenge GC (when XX:+UseParallelOldGC is set)?
>> (Reference to publication(s) are appreciated)
>>
>> Thanks,
>> /Nhan Nguyen
>>