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8185572: Enable AssumeMP by default on SPARC machines

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Reviewed-by: kvn, dholmes, bobv
This commit is contained in:
Poonam Bajaj 2017-08-15 14:03:52 +00:00
parent 3807233b98
commit d0e8cdbc40
1 changed files with 10 additions and 0 deletions
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10
hotspot/src/share/vm/runtime/arguments.cpp
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@ -4462,6 +4462,16 @@ jint Arguments::apply_ergo() {
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;