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7027766: G1: introduce flag to dump the liveness information per region at the end of marking

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Repurpose the existing flag G1PrintRegionLivenessInfo to print out the liveness distribution across the regions in the heap at the end of marking.

Reviewed-by: iveresov, jwilhelm
This commit is contained in:
Antonios Printezis 2011-04-04 14:23:17 -04:00
parent cec5c20656
commit f418b77aa6
7 changed files with 249 additions and 55 deletions
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51
hotspot/src/share/vm/gc_implementation/g1/collectionSetChooser.cpp
View file

@ -262,38 +262,17 @@ CollectionSetChooser::sortMarkedHeapRegions() {
for (int i = 0; i < _numMarkedRegions; i++) {
assert(_markedRegions.at(i) != NULL, "Should be true by sorting!");
_markedRegions.at(i)->set_sort_index(i);
if (G1PrintRegionLivenessInfo > 0) {
if (i == 0) gclog_or_tty->print_cr("Sorted marked regions:");
if (i < G1PrintRegionLivenessInfo ||
(_numMarkedRegions-i) < G1PrintRegionLivenessInfo) {
HeapRegion* hr = _markedRegions.at(i);
size_t u = hr->used();
gclog_or_tty->print_cr(" Region %d: %d used, %d max live, %5.2f%%.",
i, u, hr->max_live_bytes(),
100.0*(float)hr->max_live_bytes()/(float)u);
}
}
if (G1PrintRegionLivenessInfo) {
G1PrintRegionLivenessInfoClosure cl(gclog_or_tty, "Post-Sorting");
for (int i = 0; i < _numMarkedRegions; ++i) {
HeapRegion* r = _markedRegions.at(i);
cl.doHeapRegion(r);
}
}
if (G1PolicyVerbose > 1)
printSortedHeapRegions();
assert(verify(), "should now be sorted");
}
void
printHeapRegion(HeapRegion *hr) {
if (hr->isHumongous())
gclog_or_tty->print("H: ");
if (hr->in_collection_set())
gclog_or_tty->print("CS: ");
gclog_or_tty->print_cr("Region " PTR_FORMAT " (%s%s) "
"[" PTR_FORMAT ", " PTR_FORMAT"] "
"Used: " SIZE_FORMAT "K, garbage: " SIZE_FORMAT "K.",
hr, hr->is_young() ? "Y " : " ",
hr->is_marked()? "M1" : "M0",
hr->bottom(), hr->end(),
hr->used()/K, hr->garbage_bytes()/K);
}
void
CollectionSetChooser::addMarkedHeapRegion(HeapRegion* hr) {
assert(!hr->isHumongous(),
@ -351,27 +330,9 @@ CollectionSetChooser::clearMarkedHeapRegions(){
void
CollectionSetChooser::updateAfterFullCollection() {
G1CollectedHeap* g1h = G1CollectedHeap::heap();
clearMarkedHeapRegions();
}
void
CollectionSetChooser::printSortedHeapRegions() {
gclog_or_tty->print_cr("Printing %d Heap Regions sorted by amount of known garbage",
_numMarkedRegions);
DEBUG_ONLY(int marked_count = 0;)
for (int i = 0; i < _markedRegions.length(); i++) {
HeapRegion* r = _markedRegions.at(i);
if (r != NULL) {
printHeapRegion(r);
DEBUG_ONLY(marked_count++;)
}
}
assert(marked_count == _numMarkedRegions, "must be");
gclog_or_tty->print_cr("Done sorted heap region print");
}
void CollectionSetChooser::removeRegion(HeapRegion *hr) {
int si = hr->sort_index();
assert(si == -1 || hr->is_marked(), "Sort index not valid.");