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@@ -1833,11 +1833,11 @@
void CompactibleFreeListSpace::object_iterate_since_last_GC(ObjectClosure* cl) {
// ugghh... how would one do this efficiently for a non-contiguous space?
guarantee(false, "NYI");
}
-bool CompactibleFreeListSpace::linearAllocationWouldFail() {
+bool CompactibleFreeListSpace::linearAllocationWouldFail() const {
return _smallLinearAllocBlock._word_size == 0;
}
void CompactibleFreeListSpace::repairLinearAllocationBlocks() {
// Fix up linear allocation blocks to look like free blocks
@@ -1904,10 +1904,17 @@
blk->_word_size = fc->size();
fc->dontCoalesce(); // to prevent sweeper from sweeping us up
}
}
+// Support for concurrent collection policy decisions.
+bool CompactibleFreeListSpace::should_concurrent_collect() const {
+ // In the future we might want to add in frgamentation stats --
+ // including erosion of the "mountain" into this decision as well.
+ return !adaptive_freelists() && linearAllocationWouldFail();
+}
+
// Support for compaction
void CompactibleFreeListSpace::prepare_for_compaction(CompactPoint* cp) {
SCAN_AND_FORWARD(cp,end,block_is_obj,block_size);
// prepare_for_compaction() uses the space between live objects
@@ -2011,15 +2018,15 @@
fl->set_splitBirths(0);
fl->set_splitDeaths(0);
}
}
-void CompactibleFreeListSpace::endSweepFLCensus(int sweepCt) {
+void CompactibleFreeListSpace::endSweepFLCensus(size_t sweep_count) {
setFLSurplus();
setFLHints();
if (PrintGC && PrintFLSCensus > 0) {
- printFLCensus(sweepCt);
+ printFLCensus(sweep_count);
}
clearFLCensus();
assert_locked();
_dictionary->endSweepDictCensus(SplitSurplusPercent);
}
@@ -2291,63 +2298,41 @@
assert((IndexSetStride != 2) || (IndexSetSize % 2 == 1),
"For-loops that iterate over IndexSet with stride 2 may be wrong");
}
#endif
-void CompactibleFreeListSpace::printFLCensus(int sweepCt) const {
+void CompactibleFreeListSpace::printFLCensus(size_t sweep_count) const {
assert_lock_strong(&_freelistLock);
- ssize_t bfrSurp = 0;
- ssize_t surplus = 0;
- ssize_t desired = 0;
- ssize_t prevSweep = 0;
- ssize_t beforeSweep = 0;
- ssize_t count = 0;
- ssize_t coalBirths = 0;
- ssize_t coalDeaths = 0;
- ssize_t splitBirths = 0;
- ssize_t splitDeaths = 0;
- gclog_or_tty->print("end sweep# %d\n", sweepCt);
- gclog_or_tty->print("%4s\t" "%7s\t" "%7s\t" "%7s\t" "%7s\t"
- "%7s\t" "%7s\t" "%7s\t" "%7s\t" "%7s\t"
- "%7s\t" "\n",
- "size", "bfrsurp", "surplus", "desired", "prvSwep",
- "bfrSwep", "count", "cBirths", "cDeaths", "sBirths",
- "sDeaths");
-
+ FreeList total;
+ gclog_or_tty->print("end sweep# " SIZE_FORMAT "\n", sweep_count);
+ FreeList::print_labels_on(gclog_or_tty, "size");
size_t totalFree = 0;
for (size_t i = IndexSetStart; i < IndexSetSize; i += IndexSetStride) {
const FreeList *fl = &_indexedFreeList[i];
totalFree += fl->count() * fl->size();
-
- gclog_or_tty->print("%4d\t" "%7d\t" "%7d\t" "%7d\t"
- "%7d\t" "%7d\t" "%7d\t" "%7d\t"
- "%7d\t" "%7d\t" "%7d\t" "\n",
- fl->size(), fl->bfrSurp(), fl->surplus(), fl->desired(),
- fl->prevSweep(), fl->beforeSweep(), fl->count(), fl->coalBirths(),
- fl->coalDeaths(), fl->splitBirths(), fl->splitDeaths());
- bfrSurp += fl->bfrSurp();
- surplus += fl->surplus();
- desired += fl->desired();
- prevSweep += fl->prevSweep();
- beforeSweep += fl->beforeSweep();
- count += fl->count();
- coalBirths += fl->coalBirths();
- coalDeaths += fl->coalDeaths();
- splitBirths += fl->splitBirths();
- splitDeaths += fl->splitDeaths();
+ if (i % (40*IndexSetStride) == 0) {
+ FreeList::print_labels_on(gclog_or_tty, "size");
}
- gclog_or_tty->print("%4s\t"
- "%7d\t" "%7d\t" "%7d\t" "%7d\t" "%7d\t"
- "%7d\t" "%7d\t" "%7d\t" "%7d\t" "%7d\t" "\n",
- "totl",
- bfrSurp, surplus, desired, prevSweep, beforeSweep,
- count, coalBirths, coalDeaths, splitBirths, splitDeaths);
- gclog_or_tty->print_cr("Total free in indexed lists %d words", totalFree);
+ fl->print_on(gclog_or_tty);
+ total.set_bfrSurp( total.bfrSurp() + fl->bfrSurp() );
+ total.set_surplus( total.surplus() + fl->surplus() );
+ total.set_desired( total.desired() + fl->desired() );
+ total.set_prevSweep( total.prevSweep() + fl->prevSweep() );
+ total.set_beforeSweep(total.beforeSweep() + fl->beforeSweep());
+ total.set_count( total.count() + fl->count() );
+ total.set_coalBirths( total.coalBirths() + fl->coalBirths() );
+ total.set_coalDeaths( total.coalDeaths() + fl->coalDeaths() );
+ total.set_splitBirths(total.splitBirths() + fl->splitBirths());
+ total.set_splitDeaths(total.splitDeaths() + fl->splitDeaths());
+ }
+ total.print_on(gclog_or_tty, "TOTAL");
+ gclog_or_tty->print_cr("Total free in indexed lists "
+ SIZE_FORMAT " words", totalFree);
gclog_or_tty->print("growth: %8.5f deficit: %8.5f\n",
- (double)(splitBirths+coalBirths-splitDeaths-coalDeaths)/
- (prevSweep != 0 ? (double)prevSweep : 1.0),
- (double)(desired - count)/(desired != 0 ? (double)desired : 1.0));
+ (double)(total.splitBirths()+total.coalBirths()-total.splitDeaths()-total.coalDeaths())/
+ (total.prevSweep() != 0 ? (double)total.prevSweep() : 1.0),
+ (double)(total.desired() - total.count())/(total.desired() != 0 ? (double)total.desired() : 1.0));
_dictionary->printDictCensus();
}
// Return the next displaced header, incrementing the pointer and
// recycling spool area as necessary.