JDK-8147906 : G1 use of os::processor_count()
  • Type: Sub-task
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 9
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2016-01-21
  • Updated: 2016-02-25
  • Resolved: 2016-01-29
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JDK 9
9 b107Fixed
Related Reports
Relates :  
JDK-8078703 - Ensure that GC's use of processor count is correct
Relates :  
JDK-8148771 - os::active_processor_count() returns garbage which causes VM to crash.
Description
With regard to the umbrella task JDK-8147905 please check how G1 utilizes the processor_count() information:

./share/vm/gc/g1/dirtyCardQueue.cpp:  return (uint)os::processor_count();
./share/vm/gc/g1/concurrentMark.cpp:    double cpu_ratio = 1.0 / (double) os::processor_count();
./share/vm/gc/g1/concurrentMark.cpp:                                              (double) os::processor_count();