[8u] Request for enhancement backport approval for JDK-8166684: implement intrinsic code with vector instructions for Unsafe.copyMemory()

[Rob McKenna]

Thanks Hiroshi, your request is under review.

    -Rob

On 13/12/16 06:19, Hiroshi H Horii wrote:
> Dear all,
> 
> Could you please approve the backport of the following ppc64 change to 
> jdk8u-dev?
> 
> 8166684: implement intrinsic code with vector instructions for 
> Unsafe.copyMemory()
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8166684
> Webrev: http://cr.openjdk.java.net/~horii/8166684/webrev.02/
> Review: 
> http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2016-September/024567.html
> URL: http://hg.openjdk.java.net/jdk9/hs/hotspot/rev/0f2a78897867
> 
> This change improves performance of unsafe.copyMemory for ppc64le. Recent 
> open sources frequently use copyMemory. 
> This is a significant ppc64-only performance improvement which will not 
> affect any of the Oracle platforms in any way. 
> 
> This change needs a part of the following change 
> (src/cpu/ppc/vm/stubGenerator_ppc.cpp).
> 
> 8144019: PPC64 C1: Introduce Client Compiler
> URL: http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/4a24de859a87
> 
> Regards,
> Hiroshi
> -----------------------
> Hiroshi Horii, Ph.D.
> IBM Research - Tokyo
> 
>