Mercurial > hg > truffle
diff src/share/vm/runtime/arguments.cpp @ 8845:1b90c7607451
2178143: JVM crashes if the number of bound CPUs changed during runtime
Summary: Supply a new flag -XX:+AssumeMP to workaround the problem. With the flag is turned on, assume VM run on MP platform so is_MP() will return true that sync calls will not skip away.
Reviewed-by: dholmes, acorn, dcubed, jmasa
Contributed-by: yumin.qi@oracle.com
| author | minqi |
|---|---|
| date | Wed, 27 Mar 2013 17:03:19 -0700 |
| parents | 36376b540a98 |
| children | c0f9217203b2 |
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--- a/src/share/vm/runtime/arguments.cpp Wed Mar 27 13:26:44 2013 -0700 +++ b/src/share/vm/runtime/arguments.cpp Wed Mar 27 17:03:19 2013 -0700 @@ -3325,6 +3325,13 @@ } check_deprecated_gcs(); check_deprecated_gc_flags(); + if (AssumeMP && !UseSerialGC) { + if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) { + warning("If the number of processors is expected to increase from one, then" + " you should configure the number of parallel GC threads appropriately" + " using -XX:ParallelGCThreads=N"); + } + } #else // INCLUDE_ALL_GCS assert(verify_serial_gc_flags(), "SerialGC unset"); #endif // INCLUDE_ALL_GCS