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Bug ID: 6973570 OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging
6973570 : OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging

Details
Type:
Bug
Submit Date:
2010-07-30
Status:
Closed
Updated Date:
2011-05-11
Project Name:
JDK
Resolved Date:
2011-04-23
Component:
hotspot
OS:
generic
Sub-Component:
runtime
CPU:
generic
Priority:
P3
Resolution:
Fixed
Affected Versions:
hs19
Fixed Versions:
hs19

Related Reports
Backport:
JDK-2196630 - OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging
Backport:
JDK-2197637 - OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging
Backport:
JDK-2197929 - OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging
Backport:
JDK-2198043 - OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging
Backport:
JDK-2199832 - OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging
Backport:
JDK-2205551 - OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging
Backport:
JDK-2205550 - OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging
Relates:
JDK-6948538 - CMS: BOT walkers can fall into object allocation and initialization cracks
Relates:
JDK-6975121 - OrderAccess should use compiler intrinsics where possible

Sub Tasks

Description
See comments section.

Comments
EVALUATION

http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/a6bff45449bc
2010-08-11 
SUGGESTED FIX

file:///net/neeraja.us.oracle.com/export/ysr/store_store/webrev/index.html

(When we move to SS12.2 we should use the new compiler support for barriers,
for which a separate bug will be filed.)
2010-08-05 
EVALUATION

SubCR's will be needed for other releases to which 6948538 is planned to be backported.
2010-07-30


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