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Quick Lists
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Bug ID:
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6810845
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Votes
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0
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Synopsis
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Performance regression in mpegaudio on x64
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Category
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hotspot:compiler2
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Reported Against
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Release Fixed
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hs15(b05),
7(b54) (Bug ID:2175673)
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State
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10-Fix Delivered,
request for enhancement
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Priority:
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3-Medium
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Related Bugs
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6743900
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Submit Date
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26-FEB-2009
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Description
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The regression was introduced by changes in
6743900: frequency based block layout
Switching off BlockLayoutByFrequency does not help.
i% gamma -showversion SpecApplication -s100 -M5 -m5 -g -d3000 -a _222_mpegaudio | grep Finished
java version "1.6.0_06-p"
Java(TM) SE Runtime Environment (build 1.6.0_06-p-b04)
OpenJDK 64-Bit Server VM (build 14.0-b06-2008-10-31-000942.never.6764622, mixed mode)
======= _222_mpegaudio Finished in 1.572 secs
======= _222_mpegaudio Finished in 1.238 secs
======= _222_mpegaudio Finished in 1.214 secs
======= _222_mpegaudio Finished in 1.213 secs
======= _222_mpegaudio Finished in 1.208 secs
% gamma -showversion SpecApplication -s100 -M5 -m5 -g -d3000 -a _222_mpegaudio | grep Finished
java version "1.6.0_06-p"
Java(TM) SE Runtime Environment (build 1.6.0_06-p-b04)
OpenJDK 64-Bit Server VM (build 14.0-b06-2008-11-06-230423.rasbold.6743900, mixed mode)
======= _222_mpegaudio Finished in 1.786 secs
======= _222_mpegaudio Finished in 1.454 secs
======= _222_mpegaudio Finished in 1.425 secs
======= _222_mpegaudio Finished in 1.426 secs
======= _222_mpegaudio Finished in 1.422 secs
% gamma -XX:-BlockLayoutByFrequency -showversion SpecApplication -s100 -M5 -m5 -g -d3000 -a _222_mpegaudio | grep Finished
java version "1.6.0_06-p"
Java(TM) SE Runtime Environment (build 1.6.0_06-p-b04)
OpenJDK 64-Bit Server VM (build 14.0-b06-2008-11-06-230423.rasbold.6743900, mixed mode)
======= _222_mpegaudio Finished in 1.799 secs
======= _222_mpegaudio Finished in 1.471 secs
======= _222_mpegaudio Finished in 1.446 secs
======= _222_mpegaudio Finished in 1.445 secs
======= _222_mpegaudio Finished in 1.441 secs
Posted Date : 2009-02-26 22:09:31.0
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Work Around
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N/A
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Evaluation
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http://hg.openjdk.java.net/jdk7/hotspot-comp/hotspot/rev/fbc12e71c476
Posted Date : 2009-03-27 01:21:57.0
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Comments
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PLEASE NOTE: JDK6 is formerly known as Project Mustang
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