OpenJDK / jdk / hs
changeset 46815:58689a7ca4e0
8185572: Enable AssumeMP by default on SPARC machines
Reviewed-by: kvn, dholmes, bobv
| author | poonam |
|---|---|
| date | Tue, 15 Aug 2017 14:03:52 +0000 |
| parents | 2e45cd2fdcb6 |
| children | a27c007d05bb 9380b77281d2 |
| files | hotspot/src/share/vm/runtime/arguments.cpp |
| diffstat | 1 files changed, 10 insertions(+), 0 deletions(-) [+] |
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--- a/hotspot/src/share/vm/runtime/arguments.cpp Tue Aug 15 15:02:40 2017 +0300 +++ b/hotspot/src/share/vm/runtime/arguments.cpp Tue Aug 15 14:03:52 2017 +0000 @@ -4462,6 +4462,16 @@ set_shared_spaces_flags(); +#if defined(SPARC) + // BIS instructions require 'membar' instruction regardless of the number + // of CPUs because in virtualized/container environments which might use only 1 + // CPU, BIS instructions may produce incorrect results. + + if (FLAG_IS_DEFAULT(AssumeMP)) { + FLAG_SET_DEFAULT(AssumeMP, true); + } +#endif + // Check the GC selections again. if (!check_gc_consistency()) { return JNI_EINVAL;