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From "Li-Gang Wang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HARMONY-4891) [drlvm][gc] heap exhaustion performance is five times slower than RI's one
Date Mon, 08 Oct 2007 03:42:50 GMT

    [ https://issues.apache.org/jira/browse/HARMONY-4891?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12533030
] 

Li-Gang Wang commented on HARMONY-4891:
---------------------------------------

Alexei, could you please upload a single patch based on the latest rivision of DRLVM for reproducing
this problem? I cannot follow the patch links to HARMONY-4882 and HARMONY-4114. It seems the
patches have a long history.

Thanks a lot.

> [drlvm][gc] heap exhaustion performance is five times slower than RI's one
> --------------------------------------------------------------------------
>
>                 Key: HARMONY-4891
>                 URL: https://issues.apache.org/jira/browse/HARMONY-4891
>             Project: Harmony
>          Issue Type: Bug
>          Components: DRLVM
>         Environment: Windows, ia32
>            Reporter: Alexei Fedotov
>            Assignee: Xiao-Feng Li
>
> $ time win_ia32_msvc_release/deploy/jdk/jre/bin/java -cp bin/classes org.apache.harmony.test.stress.gc.share.GcTest
> [concurrent] Starting org.apache.harmony.test.stress.gc.share.GcTest
> [debug] total = 268435456, used = 2165188, ratio = 13, sizes = 1 - 2097152
> test() - [123709.342995ms,97.95109033584595%]
> total: 1, failures:0 (GREEN) - 123770.125835ms
> real    2m9.328s
> user    0m0.015s
> sys     0m0.000s
> $ time java -cp bin/classes org.apache.harmony.test.stress.gc.share.GcTest
> [concurrent] Starting org.apache.harmony.test.stress.gc.share.GcTest
> [debug] total = 66650112, used = 142120, ratio = 13, sizes = 1 - 2097152
> test() - [47643.880758ms,92.48719041912487%]
> total: 1, failures:0 (GREEN) - 47670.789275ms
> real    0m47.953s
> user    0m0.015s
> sys     0m0.000s
> The test itself runs exactly 30sec, and most of the time is taken by single-threaded
heap exhaustions to estimate the maximum size available for allocation.
> 1. It would be great to get within 70% of RI performance.
> 2. It would be great if one tunes debug build performance which is currently x40 times
slower. The debug build is used for regular stress test runs and this would help to save some
time.

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