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

[Seán Coffey]

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
>>
>