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8005452: NPG: Create new flags for Metaspace resizing policy

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Reviewed-by: johnc, jwilhelm, coleenp, stefank
This commit is contained in:
Jon Masamitsu 2013-01-23 19:08:04 -08:00
parent 251a9ff39c
commit c727c73cce
3 changed files with 31 additions and 7 deletions
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18
hotspot/src/share/vm/runtime/arguments.cpp
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@ -1896,6 +1896,24 @@ bool Arguments::check_vm_args_consistency() {
// Keeping the heap 100% free is hard ;-) so limit it to 99%.
MinHeapFreeRatio = MIN2(MinHeapFreeRatio, (uintx) 99);
// Min/MaxMetaspaceFreeRatio
status = status && verify_percentage(MinMetaspaceFreeRatio, "MinMetaspaceFreeRatio");
status = status && verify_percentage(MaxMetaspaceFreeRatio, "MaxMetaspaceFreeRatio");
if (MinMetaspaceFreeRatio > MaxMetaspaceFreeRatio) {
jio_fprintf(defaultStream::error_stream(),
"MinMetaspaceFreeRatio (%s" UINTX_FORMAT ") must be less than or "
"equal to MaxMetaspaceFreeRatio (%s" UINTX_FORMAT ")\n",
FLAG_IS_DEFAULT(MinMetaspaceFreeRatio) ? "Default: " : "",
MinMetaspaceFreeRatio,
FLAG_IS_DEFAULT(MaxMetaspaceFreeRatio) ? "Default: " : "",
MaxMetaspaceFreeRatio);
status = false;
}
// Trying to keep 100% free is not practical
MinMetaspaceFreeRatio = MIN2(MinMetaspaceFreeRatio, (uintx) 99);
if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) {
MarkSweepAlwaysCompactCount = 1; // Move objects every gc.
}