-
Enhancement
-
Resolution: Fixed
-
P4
-
9
-
b115
-
Fix failed
http://mail.openjdk.java.net/pipermail/hotspot-gc-dev/2016-March/016774.html
http://mail.openjdk.java.net/pipermail/hotspot-gc-dev/2016-March/016896.html
I wonder that STW phases (Remark and Cleanup) at G1 are not counted in jstat FGC column.
For example, Initial Mark and Remark at CMS are counted as FGC.
We discussed on hotspot-gc-dev for this issue, and I proposed to add new PerfCounter for CGC STW phases.
We can override jstat_options if we want to watch CGC counters.
Also we can check it through PerfCounter.print jcmd.
* hotspot: http://cr.openjdk.java.net/~ysuenaga/JDK-6291341/poc-2/hotspot/
* jdk: http://cr.openjdk.java.net/~ysuenaga/JDK-6291341/poc-2/jdk/
For compatibility, this patch works the same as the current by default.
If you set -XX:+EnableConcGCPerfCounter, CGC counter will work fine.
(I want to set +EnableConcGCPerfCounter by default)
http://mail.openjdk.java.net/pipermail/hotspot-gc-dev/2016-March/016896.html
I wonder that STW phases (Remark and Cleanup) at G1 are not counted in jstat FGC column.
For example, Initial Mark and Remark at CMS are counted as FGC.
We discussed on hotspot-gc-dev for this issue, and I proposed to add new PerfCounter for CGC STW phases.
We can override jstat_options if we want to watch CGC counters.
Also we can check it through PerfCounter.print jcmd.
* hotspot: http://cr.openjdk.java.net/~ysuenaga/JDK-6291341/poc-2/hotspot/
* jdk: http://cr.openjdk.java.net/~ysuenaga/JDK-6291341/poc-2/jdk/
For compatibility, this patch works the same as the current by default.
If you set -XX:+EnableConcGCPerfCounter, CGC counter will work fine.
(I want to set +EnableConcGCPerfCounter by default)
- relates to
-
JDK-8153302 [BACKOUT] STW phases at Concurrent GC should count in PerfCounter
-
- Resolved
-
-
JDK-8153283 Multiple jstat failures in hs nightly
-
- Closed
-
-
JDK-8153333 [REDO] STW phases at Concurrent GC should count in PerfCounter
-
- Resolved
-
-
JDK-8164431 Release Note: New PerfCounters for STW Phases on Concurrent GC Are Available
-
- Closed
-
-
JDK-8153280 sun/tools/jstatd/TestJstatd* tests fail with java.io.IOException: Stream closed and missing headline
-
- Closed
-
-
JDK-6291341 jstat: FGC counter confusing when CMS GC is used
-
- Closed
-
(1 relates to)