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From "Mikhail Fursov (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-3991) [drlvm][jit] Memory management improvements in Jitrino compiler
Date Mon, 28 May 2007 13:06:15 GMT
[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
         Attachments: memory.diff

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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