archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-28 15:24:43 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()

Browse source 
A large part of time in the parallel scavenge collector is spent finding out the amount of live words within memory ranges to find out where to move an object to. Try to incrementally calculate this value.

Reviewed-by: tschatzl, mgerdin, jmasa
This commit is contained in:
Ray Alex 2016-01-28 13:30:12 +01:00 • committed by Thomas Schatzl
parent ce491c9057
commit 4f42f17d9e
17 changed files with 180 additions and 81 deletions
Download patch file Download diff file Expand all files Collapse all files

23
hotspot/src/share/vm/gc/parallel/psCompactionManager.hpp
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2005, 2016, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -109,6 +109,10 @@ private:
Action _action;
HeapWord* _last_query_beg;
oop _last_query_obj;
size_t _last_query_ret;
static PSOldGen* old_gen() { return _old_gen; }
static ObjectStartArray* start_array() { return _start_array; }
static OopTaskQueueSet* stack_array() { return _stack_array; }
@ -127,9 +131,26 @@ private:
// marking stack and overflow stack directly.
public:
void reset_bitmap_query_cache() {
_last_query_beg = NULL;
_last_query_obj = NULL;
_last_query_ret = 0;
}
Action action() { return _action; }
void set_action(Action v) { _action = v; }
// Bitmap query support, cache last query and result
HeapWord* last_query_begin() { return _last_query_beg; }
oop last_query_object() { return _last_query_obj; }
size_t last_query_return() { return _last_query_ret; }
void set_last_query_begin(HeapWord *new_beg) { _last_query_beg = new_beg; }
void set_last_query_object(oop new_obj) { _last_query_obj = new_obj; }
void set_last_query_return(size_t new_ret) { _last_query_ret = new_ret; }
static void reset_all_bitmap_query_caches();
RegionTaskQueue* region_stack() { return _region_stack; }
void set_region_stack(RegionTaskQueue* v) { _region_stack = v; }