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Type: Bug
Resolution: Fixed
Priority: P3
Fix Version/s: 11
Affects Version/s: 9, 10
Component/s: hotspot
Labels:

Subcomponent:
compiler
Resolved In Build:
b22

Issue	Fix Version	Assignee	Priority	Status	Resolution	Resolved In Build
JDK-8207120	12	Vivek Deshpande	P3	Resolved	Fixed	b03
JDK-8207472	11.0.2	Vivek Deshpande	P3	Resolved	Fixed	b01
JDK-8207582	11.0.1	Vivek Deshpande	P3	Resolved	Fixed	b02

While investigating ~~JDK-8194659~~, I've noticed that disabling UseSubwordForMaxVector (which is enabled by default) improves performance.

The optimization reduces performance of the SPECjvm2008-MPEG benchmark by up to 3.5% and also affects performance of other benchmarks (see ~~JDK-8194659~~ for details).

backported by

JDK-8207120 UseSubwordForMaxVector causes performance regression

Resolved

JDK-8207472 UseSubwordForMaxVector causes performance regression

Resolved

JDK-8207582 UseSubwordForMaxVector causes performance regression

Resolved

duplicates

JDK-8194659 SPECjvm2008-MPEG performance regressions in 10-b31

Closed

JDK-8194660 SPECjvm2008-SOR.large regressions in 10-b31 on SPARC

Closed

relates to

JDK-8175096 Analyse subword in the loop to set maximum vector size.

Resolved

JDK-8209516 DSA generateKeyPair performance regression in jdk11b22 (SPARC)

Closed

(2 relates to)

Assignee:: Vivek Deshpande (Inactive)
Reporter:: Tobias Hartmann
Votes:: 0 Vote for this issue
Watchers:: 6 Start watching this issue

Created:: 2018-01-08 07:00
Updated:: 2019-09-13 12:51
Resolved:: 2018-07-09 13:24

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