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Bug ID: 6372116 OSR compilation attempted for huge methods
6372116 : OSR compilation attempted for huge methods

Details
Type:
Bug
Submit Date:
2006-01-12
Status:
Resolved
Updated Date:
2010-04-05
Project Name:
JDK
Resolved Date:
2006-01-24
Component:
hotspot
OS:
generic
Sub-Component:
compiler
CPU:
generic
Priority:
P2
Resolution:
Fixed
Affected Versions:
6
Fixed Versions:
6

Related Reports
Backport:
JDK-2133771 - OSR compilation attempted for huge methods
Backport:
JDK-2174444 - OSR compilation attempted for huge methods
Backport:
JDK-2161093 - OSR compilation attempted for huge methods
Relates:
JDK-6579892 - 1.4.2_12 server VM fails with EXCEPTION_STACK_OVERFLOW on Windows in PhaseCFG::set_pinned
Relates:
JDK-6360541 - 5.0u6 assert gcm.cpp:1306 assert(bs->has_valid_counts(), "Bad goto frequency/count
Relates:
JDK-6453531 - Severe performance regression on long methods for server VM

Sub Tasks

Description
The HotSpot compilers attempt to OSR-compile huge methods (greater than 8000 bytes of bytecodes).  The HotSpot compilationPolicy avoids entry-compilation of such methods.

Due to the entry-compilation policy, the compilers are not well-tested on huge methods,
and strange crashes (see 6360541) have been observed on OSR compiles of such.

The OSR and entry policies should be made consistent.

Comments
SUGGESTED FIX

See PRT webrev:

http://analemma.sfbay.sun.com/net/prt-archiver.sfbay/data/archived_workspaces/main/c2_baseline/2006/20060118064414.rasbold.c2_baseline2/workspace/webrevs/webrev-2006.01.18/index.html
2006-01-18 
EVALUATION

Fix compilationPolicy.cpp to check canBeCompiled() on back-branch events, as it does on entry events.
2006-01-12


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