RFR: Backport of 6412968 and 6990419 to 7u

Jon Masamitsu jon.masamitsu at oracle.com
Wed Feb 12 22:53:37 PST 2014


Poonam,

Looks fine.

Jon

On 2/12/2014 6:14 PM, Poonam Bajaj wrote:
> Hi,
>
> Could I have some reviews on the following backport changes, please.
> http://cr.openjdk.java.net/~poonam/6412968_6990419/webrev.01/
>
> Thanks,
> Poonam
>
> On 2/11/2014 10:30 AM, Poonam Bajaj wrote:
>> Hi,
>>
>> As per Jon Masamitsu's suggestion, we would be having the 
>> CMSParallelInitialMarkEnabled and CMSEdenChunksRecordAlways flags' 
>> value 'false' by default for 7u so as not to introduce any behavior 
>> changes in 7 update release. The updated webrev is here:
>> http://cr.openjdk.java.net/~poonam/6412968_6990419/webrev.01/
>>
>> Thanks,
>> Poonam
>>
>> On 2/9/2014 5:13 PM, Poonam Bajaj wrote:
>>> Hi All,
>>>
>>> Could I have some reviews for the backport of the following two 
>>> fixes from jdk8 to 7u:
>>> 6412968 <https://bugs.openjdk.java.net/browse/JDK-6412968>: CMS: 
>>> Long initial mark pauses
>>> 6990419 <https://bugs.openjdk.java.net/browse/JDK-6990419>: CMS: 
>>> Remaining work for 6572569: consistently skewed work distribution in 
>>> (long) re-mark pauses
>>>
>>> These changes parallelize the initial-mark phase of the CMS 
>>> collector and improve the work distribution among parallel worker 
>>> threads.
>>> Webrev: http://cr.openjdk.java.net/~poonam/6412968_6990419/webrev.00/
>>>
>>> Original fixes:
>>> 6412968 : http://hg.openjdk.java.net/hsx/hsx25/hotspot/rev/ca9dedeebdec
>>> 6990419: http://hg.openjdk.java.net/hsx/hsx25/hotspot/rev/7b06ae405d7b
>>>
>>> Testing:
>>> JPRT, Customer verification testing
>>>
>>> Thanks,
>>> Poonam
>>>
>>>
>>>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.openjdk.java.net/pipermail/hotspot-gc-dev/attachments/20140212/96fe2722/attachment.html 


More information about the hotspot-gc-dev mailing list