[8u-dev] Request for enhancement backport approval for CR JDK-8131048 and JDK-8164920

[Seán Coffey]

Gustavo,

this is approved for jdk8u-dev.

Regards,
Sean.

On 05/10/18 17:21, Seán Coffey wrote:
> Thanks for the request Gustavo. I hope to have an answer for you shortly.
>
> Regards,
> Sean.
>
> On 05/10/18 14:06, Gustavo Romero wrote:
>> Hi,
>>
>> Any news on that request?
>>
>> Please let me know if any bit of information is missing so I can 
>> provide it.
>>
>> Thanks.
>>
>>
>> Best regards,
>> Gustavo
>>
>> On 10/03/2018 01:00 PM, Gustavo Romero wrote:
>>> Hi,
>>>
>>> I'd like to request an enhancement backport approval for JDK-8131048 
>>> [1] and
>>> JDK-8164920 [2]  which will add support for CRC32 intrinsics on PPC64.
>>>
>>> Adding support for the CRC32 intrinsics on PPC64 would be highly 
>>> beneficial and
>>> important for the performance of several workloads relying on CRC32 
>>> methods and
>>> it's specially important for some Apache Cassandra workloads on 
>>> PPC64. For
>>> instance, YCSB benchmark improves its throughput by 19 % when the CRC32
>>> intrinsics are enabled.
>>>
>>> The risk involved is low and it affects only the PPC64 platform.
>>>
>>> JDK-8131048 and JDK-8164920 backports have been reviewed by Goetz 
>>> Lindenmaier
>>> on hotspot-compiler-dev ML [3]. The changes were tested on PPC64 LE 
>>> / Linux,
>>> PPC64 BE / Linux, and PPC64 BE / AIX. No regression was observed.
>>>
>>> The webrevs for OpenJDK 8u can be found in:
>>>
>>> "8131048: ppc: implement CRC32 intrinsic"
>>> http://cr.openjdk.java.net/~gromero/crc32_jdk8u/v3/8131048/
>>>
>>> "8164920: ppc: enhancement of CRC32 intrinsic"
>>> http://cr.openjdk.java.net/~gromero/crc32_jdk8u/v3/8164920/
>>>
>>> Thank you.
>>>
>>>
>>> Best regards,
>>> Gustavo
>>>
>>> [1] https://bugs.openjdk.java.net/browse/JDK-8131048
>>> [2] https://bugs.openjdk.java.net/browse/JDK-8164920
>>> [3] 
>>> http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2018-October/030819.html
>>>
>>
>