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

[Gustavo Romero]

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
>