Loading...

XML

Word

Printable

Type: Bug
Resolution: Fixed
Priority: P3
Fix Version/s: 9
Affects Version/s: 8u60, 9
Component/s: hotspot
Labels:
- noreg-perf

Subcomponent:
compiler
Resolved In Build:
b64

Issue	Fix Version	Assignee	Priority	Status	Resolution	Resolved In Build
JDK-8082629	emb-9	Vladimir Ivanov	P3	Resolved	Fixed	team
JDK-8086498	8u65	Vladimir Ivanov	P3	Resolved	Fixed	b01
JDK-8074549	8u60	Vladimir Ivanov	P3	Resolved	Fixed	b14
JDK-8137543	emb-8u65	Unassigned	P3	Resolved	Fixed	b01
JDK-8079946	emb-8u60	Vladimir Ivanov	P3	Resolved	Fixed	team

MethodHandleImpl::profileBoolean doesn't update never-taken branch count when hitting a deopt on it.
As a result, for rarely taken branches consequent compilations consider them as never-taken and prune them again, causing repeated deopts. It severely affects peak performance.

backported by

JDK-8074549 Never-taken branches cause repeated deopts in MHs.GWT case

Resolved

JDK-8079946 Never-taken branches cause repeated deopts in MHs.GWT case

Resolved

JDK-8082629 Never-taken branches cause repeated deopts in MHs.GWT case

Resolved

JDK-8086498 Never-taken branches cause repeated deopts in MHs.GWT case

Resolved

JDK-8137543 Never-taken branches cause repeated deopts in MHs.GWT case

Resolved

Assignee:: Vladimir Ivanov

Reporter:: Vladimir Ivanov

Votes:: 0 Vote for this issue

Watchers:: 2 Start watching this issue

Created:: 2015-03-06 04:44

Updated:: 2015-09-29 04:38

Resolved:: 2015-03-20 15:31

Details

Backports

Description

Attachments

Issue Links

Activity

People

Dates