Flag in JDK 7uXX to allow visibility into code cache usage?

[Srinivas Ramakrishna]

We recently had a situation when code cache flushing, when the code cache
was nearly full, caused a large drop
in performance. It would be nice if there were a product flag (also in
7uXX) by which one could get
a read of the code cache size on a periodic basis. It might be great, for
instance, if this value were
printed, say at each GC.

I understand that there is an Mbean that can be read to determine this
value, but I was looking for
something like a JVM flag that allows this to be printed to a log file on a
periodic basis, say at each GC (or even eacn
major gc cycle). In 7uXX at least there seem to be far too few means to
track the usage of the code
cache.

thanks for anything that can be done in this area, wrt visibility (in 7uXX
:-)
-- ramki
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