[jira] Commented: (HARMONY-3991) [drlvm][jit] Memory management improvements in Jitrino compiler

["Mikhail Fursov (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HARMONY-3991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12499793 ] 

Mikhail Fursov commented on HARMONY-3991:
-----------------------------------------

VM gurus, 
could I ask you to check Test.java with interpreter? It requires > 1Gig memory to run and I think this is a problem.


> [drlvm][jit] Memory management improvements in Jitrino compiler
> ---------------------------------------------------------------
>
>                 Key: HARMONY-3991
>                 URL: https://issues.apache.org/jira/browse/HARMONY-3991
>             Project: Harmony
>          Issue Type: Improvement
>          Components: DRLVM
>            Reporter: Mikhail Fursov
>            Assignee: Alexey Varlamov
>         Attachments: memory.diff, memory2.diff, Test.java
>
>
> Jitrino.OPT compiler allocates ~200*(bytecode method size) bytes before compiling a method.
> If the size of the method is large (~50Kb) and ~ 100-1000 threads concur to compile a method the memory footprint can be very large: 1-10Gb
> The similar situation we have today with a real specjapp2004 benchmark.
> lock_method and unlock_method actions that force Jitrino to acquire locks for each compilation session will not help today, because locking, as a PMF action, works after initial heap is requested.

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