JDK-7102300 : compiler/5091921/Test6890943.java is incorrect
  • Type: Bug
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: hs24,8
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2011-10-18
  • Updated: 2013-09-12
  • Resolved: 2013-02-19
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JDK 7 JDK 8 Other
7u40Fixed 8Fixed hs24Fixed
Description
This test invokes java program via script and then compares the output with gold result, if different, it fails. However, if a VM issues a warning, the test will report failure even actually there was no failure.
Comments
Got it. We will add 2 flags to the test and filter only THIS particular warning.
09-02-2013
If this test will always tickle this performance warning then we at least need to exclude this warning from consideration.
09-02-2013
Note, I agree with adding -XX:+IgnoreUnrecognizedVMOptions -XX:-PrintVMOptions. But I am concern about -XX:-PrintWarnings.
09-02-2013
So next warning is expected behavior? Java HotSpot(TM) Server VM warning: Performance bug: SystemDictionary lookup_count=19343 lookup_length=20430 average=1.056196 load=0.500496 We will not catch such cases if we filter such warnings. Should we instead fix VM to avoid these warnings?
09-02-2013
Better to have the script filter out warning messages I think.
06-02-2013
EVALUATION This test passes now. I think we want it to start failing again if there are warnings from the VM. I'm going to close this as a not a bug (anymore).
02-08-2012
EVALUATION The code generating the warning: src/share/vm/utilities/hashtable.cpp: 225 void BasicHashtable::verify_lookup_length(double load) { 226 if ((double)_lookup_length / (double)_lookup_count > load * 2.0) { 227 warning("Performance bug: SystemDictionary lookup_count=%d " 228 "lookup_length=%d average=%lf load=%f", 229 _lookup_count, _lookup_length, 230 (double) _lookup_length / _lookup_count, load); 231 } 232 } Tests that do golden file comparisons need to be run with the following options: -XX:+IgnoreUnrecognizedVMOptions -XX:-PrintVMOptions -XX:-PrintWarnings
09-12-2011