JDK-8081285 : Improve performance of string compression on Sparc
Type:Sub-task
Component:hotspot
Sub-Component:compiler
Affected Version:9
Priority:P2
Status:Resolved
Resolution:Fixed
CPU:sparc,sparc_64
Submitted:2015-05-27
Updated:2015-06-16
Resolved:2015-06-16
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Unresolved : Release in which this issue/RFE will be addressed. Resolved: Release in which this issue/RFE has been resolved. Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
We need to improve performance of string construction (compression) on Sparc. The existing intrinsic for StringCoderLatin1.toBytes0 is not good enough. See attached "performance.txt".
Comments
JDK-8054307-branch: Improved string compression intrinsic on Sparc using VIS instructions.
http://hg.openjdk.java.net/jdk9/sandbox/hotspot/rev/6995032fd6f9
16-06-2015
Prototype using VIS instructions:
http://cr.openjdk.java.net/~thartmann/sd/sparc/compress/webrev.01/