Request for review: 6976350 G1: deal with fragmentation while copying objects during GC

[Tao Mao]

To the open list:

new webrev:
http://cr.openjdk.java.net/~tamao/6976350/webrev.03/

I took suggestion from many reviewers into consideration and came up 
with the current cleaner solution.

Thank you.
Tao


On 5/14/13 2:26 PM, Jon Masamitsu wrote:
> What's the status of this review?
>
> The last mail I  could find in my mail boxes was a comment
> from Thomas.
>
> Jon
>
> On 1/28/13 12:21 PM, Tao Mao wrote:
>> 6976350 G1: deal with fragmentation while copying objects during GC
>> https://jbs.oracle.com/bugs/browse/JDK-6976350
>>
>> webrev:
>> http://cr.openjdk.java.net/~tamao/6976350/webrev.00/
>>
>> changeset:
>> Basically, we want to reuse more of par-allocation buffers instead of 
>> retiring it immediately when it encounters an object larger than its 
>> remaining part.
>>
>> (1) instead of previously using one allocation buffer per GC purpose, 
>> we use N(=2) buffers per GC purpose and modify the corresponding 
>> code. The changeset would easily scale up to whatever N (though Tony 
>> Printezis suggests 2, or 3 may be good enough)
>>
>> *(2) Two places of cleanup: allocate_during_gc_slow() is removed due 
>> to its never being called.
>>                                               access modifier 
>> (public) before trim_queue() is redundant.
>>
>>
>