JDK-7003454 : order constants in constant table by number of references in code
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: hs20
  • Priority: P4
  • Status: Closed
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2010-11-30
  • Updated: 2012-03-22
  • Resolved: 2012-01-20
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JDK 7 JDK 8 Other
7u4Fixed 8Fixed hs23Fixed
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Relates :  
Description
Order constants in constant table by number of references in code and then set constant table base so that offsets to these frequently used constants fit into simm13.

Comments
EVALUATION http://hg.openjdk.java.net/lambda/lambda/hotspot/rev/6729bbc1fcd6
22-03-2012

EVALUATION http://hg.openjdk.java.net/hsx/hotspot-emb/hotspot/rev/6729bbc1fcd6
15-12-2011

EVALUATION http://hg.openjdk.java.net/hsx/hotspot-comp/hotspot/rev/6729bbc1fcd6
16-11-2011

EVALUATION Numbers on a SPARC-T4 (chipid 0, clock 2848 MHz): ============================================================================ logs.baseline Benchmark Samples Mean Stdev Geomean Weight specjbb2005 10 99398.57 296.18 ============================================================================ logs.baseline-rdpc/ Benchmark Samples Mean Stdev %Diff P Significant specjbb2005 10 99807.58 816.16 0.41 0.164 * ============================================================================ logs.7003454 Benchmark Samples Mean Stdev %Diff P Significant specjbb2005 10 99896.30 402.16 0.50 0.006 Yes ============================================================================ logs.7003454-rdpc/ Benchmark Samples Mean Stdev %Diff P Significant specjbb2005 10 99700.92 773.54 0.30 0.272 * ============================================================================
01-08-2011