--- a/hotspot/src/share/vm/runtime/sweeper.hpp Fri Oct 24 08:35:29 2014 +0200
+++ b/hotspot/src/share/vm/runtime/sweeper.hpp Fri Oct 24 14:25:46 2014 +0200
@@ -49,9 +49,7 @@
// remove the nmethod, all inline caches (IC) that point to the the nmethod must be
// cleared. After that, the nmethod can be evicted from the code cache. Each nmethod's
// state change happens during separate sweeps. It may take at least 3 sweeps before an
-// nmethod's space is freed. Sweeping is currently done by compiler threads between
-// compilations or at least each 5 sec (NmethodSweepCheckInterval) when the code cache
-// is full.
+// nmethod's space is freed.
class NMethodSweeper : public AllStatic {
static long _traversals; // Stack scan count, also sweep ID.
@@ -64,7 +62,6 @@
static int _zombified_count; // Nof. nmethods made zombie in current sweep
static int _marked_for_reclamation_count; // Nof. nmethods marked for reclaim in current sweep
- static volatile int _sweep_fractions_left; // Nof. invocations left until we are completed with this pass
static volatile int _sweep_started; // Flag to control conc sweeper
static volatile bool _should_sweep; // Indicates if we should invoke the sweeper
static volatile int _bytes_changed; // Counts the total nmethod size if the nmethod changed from:
@@ -85,8 +82,12 @@
static int process_nmethod(nmethod *nm);
static void release_nmethod(nmethod* nm);
- static bool sweep_in_progress();
+ static void init_sweeper_log() NOT_DEBUG_RETURN;
+ static bool wait_for_stack_scanning();
static void sweep_code_cache();
+ static void handle_safepoint_request();
+ static void do_stack_scanning();
+ static void possibly_sweep();
public:
static long traversal_count() { return _traversals; }
@@ -106,7 +107,8 @@
#endif
static void mark_active_nmethods(); // Invoked at the end of each safepoint
- static void possibly_sweep(); // Compiler threads call this to sweep
+ static void sweeper_loop();
+ static void notify(int code_blob_type); // Possibly start the sweeper thread.
static int hotness_counter_reset_val();
static void report_state_change(nmethod* nm);