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7041501: NUMA: Expand the old gen more aggressively

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Expand the old gen in bigger increments

Reviewed-by: jmasa
This commit is contained in:
Igor Veresov 2011-05-04 15:08:44 -07:00
parent fbffd24fc5
commit 63f068ad0d
2 changed files with 11 additions and 0 deletions
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6
hotspot/src/share/vm/gc_implementation/parallelScavenge/psOldGen.cpp
View file

@ -224,6 +224,12 @@ void PSOldGen::expand(size_t bytes) {
const size_t alignment = virtual_space()->alignment();
size_t aligned_bytes = align_size_up(bytes, alignment);
size_t aligned_expand_bytes = align_size_up(MinHeapDeltaBytes, alignment);
if (UseNUMA) {
// With NUMA we use round-robin page allocation for the old gen. Expand by at least
// providing a page per lgroup. Alignment is larger or equal to the page size.
aligned_expand_bytes = MAX2(aligned_expand_bytes, alignment * os::numa_get_groups_num());
}
if (aligned_bytes == 0){
// The alignment caused the number of bytes to wrap. An expand_by(0) will
// return true with the implication that and expansion was done when it

5
hotspot/src/share/vm/runtime/arguments.cpp
View file

@ -1423,6 +1423,11 @@ void Arguments::set_parallel_gc_flags() {
}
}
}
if (UseNUMA) {
if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
}
}
}
void Arguments::set_g1_gc_flags() {