SA for ZGC

[Stefan Karlsson]

Hi Yasumasa,

Thanks for your contribution!

I tested your patch together with jhsdb hsdb and immediately hit 
problems because of the lack of load barriers in the SA code. Let me try 
to create an initial prototype for load barriers in the SA case and see 
where this takes us.

FYI i also found that compressed oops are not fully supported in the SA:
https://bugs.openjdk.java.net/browse/JDK-8194737

Thanks,
StefanK

On 2017-12-21 23:38, Yasumasa Suenaga wrote:
> Thanks Per!
> 
> I'm waiting for comments and sponsorship.
> 
> 
> Yasumasa
> 
> 
> On 2017/12/22 4:33, Per Liden wrote:
>> Hi Yasumasa,
>>
>> On 2017-12-21 09:40, Yasumasa Suenaga wrote:
>>> Hi all,
>>>
>>> I checked SA implementation for ZGC, but it is not yet available.
>>> For example, we can see WrongTypeException when CLHSDB `universe`
>>> command is executed.
>>>
>>> As the first step, I propose to implement ZCollectedHeap and related 
>>> classes for
>>>   SA as this webrev:
>>>
>>>    http://cr.openjdk.java.net/~ysuenaga/z/sa-universe/
>>>
>>> After applying this patch, we can use `universe` command on CLHSDB.
>>> (I followed `VM.info` jcmd output format)
>>
>> Thanks! Most of us working on ZGC are currently on vacation, but we'll 
>> have a closer look at the patch after the holidays.
>>
>> cheers,
>> Per
>>
>>>
>>> Of course, it is not all. We need to work more for it.
>>>
>>>
>>> Thanks,
>>>
>>> Yasumasa
>>>