From bb87e0f1a52de656bc77cb01cb887e51a0e5198b Mon Sep 17 00:00:00 2001 From: Mathieu Chartier Date: Fri, 3 Apr 2015 11:21:55 -0700 Subject: Refactor and improve GC root handling Changed GcRoot to use compressed references. Changed root visiting to use virtual functions instead of function pointers. Changed root visting interface to be an array of roots instead of a single root at a time. Added buffered root marking helper to avoid dispatch overhead. Root marking seems a bit faster on EvaluateAndApplyChanges due to batch marking. Pause times unaffected. Mips64 is untested but might work, maybe. Before: MarkConcurrentRoots: Sum: 67.678ms 99% C.I. 2us-664.999us Avg: 161.138us Max: 671us After: MarkConcurrentRoots: Sum: 54.806ms 99% C.I. 2us-499.986us Avg: 136.333us Max: 602us Bug: 19264997 Change-Id: I0a71ebb5928f205b9b3f7945b25db6489d5657ca --- runtime/reference_table.cc | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'runtime/reference_table.cc') diff --git a/runtime/reference_table.cc b/runtime/reference_table.cc index 357d45468..ac364479c 100644 --- a/runtime/reference_table.cc +++ b/runtime/reference_table.cc @@ -237,9 +237,10 @@ void ReferenceTable::Dump(std::ostream& os, Table& entries) { DumpSummaryLine(os, prev, GetElementCount(prev), identical, equiv); } -void ReferenceTable::VisitRoots(RootCallback* visitor, void* arg, const RootInfo& root_info) { +void ReferenceTable::VisitRoots(RootVisitor* visitor, const RootInfo& root_info) { + BufferedRootVisitor<128> buffered_visitor(visitor, root_info); for (GcRoot& root : entries_) { - root.VisitRoot(visitor, arg, root_info); + buffered_visitor.VisitRoot(root); } } -- cgit v1.2.3