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Hi Ramki,

Anything to improve visibility of the CodeCache would be hugely appreciated!

Regards,

Kirk

On Jun 10, 2015, at 9:15 AM, Srinivas Ramakrishna <ysr1729@gmail.com> wrote:

I filed https://bugs.openjdk.java.net/browse/JDK-8087107 and attached a patch to the ticket that exposes some useful code cache stats as perf data counters:

$ jcmd PerfCounter.print | grep -i "sun\\.ci\\."
sun.ci.codeCacheCapacity=6291456
sun.ci.codeCacheMaxCapacity=6291456
sun.ci.codeCacheMethodsReclaimedNum=1030
sun.ci.codeCacheSweepsTotalNum=93
sun.ci.codeCacheSweepsTotalTimeMillis=63
sun.ci.codeCacheUsed=3386880
...

At Twitter, we've found this useful for easy monitoring of code cache activity, and would like to see this integrated into OpenJDK.

thanks!
-- ramki