United StatesChange Country, Oracle Worldwide Web Sites Communities I am a... I want to...
Bug ID: JDK-6851908 interpreter null check profiling broken causing extra compilation invalidation
JDK-6851908 : interpreter null check profiling broken causing extra compilation invalidation

Details
Type:
Bug
Submit Date:
2009-06-17
Status:
Resolved
Updated Date:
2010-12-08
Project Name:
JDK
Resolved Date:
2009-07-15
Component:
hotspot
OS:
solaris_10
Sub-Component:
compiler
CPU:
x86
Priority:
P3
Resolution:
Fixed
Affected Versions:
6u14p
Fixed Versions:
hs16 (b06)

Related Reports
Backport:
Backport:
Relates:

Sub Tasks

Description
Customer trials showing slight regression in performance with HS15 in comparison with HS10, This is more noticeable with AMD chips.

                                    

Comments
EVALUATION

The profiling of nulls in the interpeter was accidentally removed in the putback for 6337834.

http://prt-web.sfbay/net/prt-archiver.sfbay/data/archived_workspaces/main/c2_baseline/2007/20070719212032.jrose.6337834/workspace/webrevs/webrev-2007.07.19/

The fix is simply to restore that code.
                                     
2009-06-26
EVALUATION

http://hg.openjdk.java.net/jdk7/hotspot-comp/hotspot/rev/3f06f139ef53
                                     
2009-06-27



Hardware and Software, Engineered to Work Together