More visibility into code cache churn (original) (raw)

Kirk Pepperdine kirk.pepperdine at gmail.com
Wed Jun 10 08:53:02 UTC 2015

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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 at 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

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