JDK-6958292 : C1: Enable parallel compilation
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: hs18,6
  • Priority: P4
  • Status: Closed
  • Resolution: Fixed
  • OS: generic,solaris
  • CPU: generic,sparc
  • Submitted: 2010-06-03
  • Updated: 2011-11-04
  • Resolved: 2011-03-08
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JDK 6 JDK 7 Other
6u21pFixed 7Fixed hs19Fixed
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Description
C1 needs to be able to do parallel compilation, which is important for SPARC CMT hardware.
Summary of the changes:

- Refactor the initialization steps into global setup to allocate some persistent pieces, and per compilation setup.
- Move state out of static fields into per thread structures.
- Convert visitor patterns that used functions to use closures.
- Remove the machinery that allowed the appearance of multithreading in the tiered world when it wasn't really supported.

Comments
EVALUATION http://hg.openjdk.java.net/jdk7/hotspot-comp/hotspot/rev/b812ff5abc73
04-06-2010