RFR: 8286865: vmTestbase/vm/mlvm/meth/stress/jni/nativeAndMH/Test.java fails with Out of space in CodeCache [v2]

[Dean Long]

On Tue, 19 Aug 2025 15:02:55 GMT, Ramkumar Sunderbabu <rsunderbabu at openjdk.org> wrote:

>> MethodHandle invocations with Xcomp are filling up CodeCache quickly in the test, especially in machines with high number of processors.
>> It is possible to measure code cache consumption per invocation, estimate overall consumption and bail out before CodeCache runs out of memory.
>> But it is much simpler to exclude the test for Xcomp flag.
>> 
>> Additional Change: MethodHandles.lookup was done unnecessarily invoked for all iterations. Replaced it with single invocation.
>> 
>> PS: This issue is not seen in JDK 20 and above, possibly due to JDK-8290025, but the exclusion guards against vagaries of CodeCache management.
>
> Ramkumar Sunderbabu has updated the pull request incrementally with one additional commit since the last revision:
> 
>   addressed review comment

-Xcomp is a useful stress flag, and this test is meant to stress MHs, not the code cache, so can we increase the code cache size enough to let it pass with -Xcomp?

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PR Comment: https://git.openjdk.org/jdk/pull/26840#issuecomment-3208502041