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src/hotspot/share/runtime/synchronizer.hpp
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rev 59376 : 8153224.v2.10.patch merged with 8153224.v2.11.patch.
*** 41,54 ****
#endif
typedef PaddedEnd<ObjectMonitor, OM_CACHE_LINE_SIZE> PaddedObjectMonitor;
struct DeflateMonitorCounters {
! int n_in_use; // currently associated with objects
! int n_in_circulation; // extant
! int n_scavenged; // reclaimed (global and per-thread)
! int per_thread_scavenged; // per-thread scavenge total
double per_thread_times; // per-thread scavenge times
};
class ObjectSynchronizer : AllStatic {
friend class VMStructs;
--- 41,54 ----
#endif
typedef PaddedEnd<ObjectMonitor, OM_CACHE_LINE_SIZE> PaddedObjectMonitor;
struct DeflateMonitorCounters {
! volatile int n_in_use; // currently associated with objects
! volatile int n_in_circulation; // extant
! volatile int n_scavenged; // reclaimed (global and per-thread)
! volatile int per_thread_scavenged; // per-thread scavenge total
double per_thread_times; // per-thread scavenge times
};
class ObjectSynchronizer : AllStatic {
friend class VMStructs;
*** 130,162 ****
// GC: we current use aggressive monitor deflation policy
// Basically we deflate all monitors that are not busy.
// An adaptive profile-based deflation policy could be used if needed
static void deflate_idle_monitors(DeflateMonitorCounters* counters);
static void deflate_thread_local_monitors(Thread* thread, DeflateMonitorCounters* counters);
static void prepare_deflate_idle_monitors(DeflateMonitorCounters* counters);
static void finish_deflate_idle_monitors(DeflateMonitorCounters* counters);
// For a given monitor list: global or per-thread, deflate idle monitors
static int deflate_monitor_list(ObjectMonitor** list_p,
int* count_p,
ObjectMonitor** free_head_p,
ObjectMonitor** free_tail_p);
static bool deflate_monitor(ObjectMonitor* mid, oop obj,
ObjectMonitor** free_head_p,
ObjectMonitor** free_tail_p);
! static bool is_cleanup_needed();
static void oops_do(OopClosure* f);
// Process oops in thread local used monitors
static void thread_local_used_oops_do(Thread* thread, OopClosure* f);
// debugging
static void audit_and_print_stats(bool on_exit);
static void chk_free_entry(JavaThread* jt, ObjectMonitor* n,
outputStream * out, int *error_cnt_p);
static void chk_global_free_list_and_count(outputStream * out,
int *error_cnt_p);
static void chk_global_in_use_list_and_count(outputStream * out,
int *error_cnt_p);
static void chk_in_use_entry(JavaThread* jt, ObjectMonitor* n,
outputStream * out, int *error_cnt_p);
static void chk_per_thread_in_use_list_and_count(JavaThread *jt,
--- 130,184 ----
// GC: we current use aggressive monitor deflation policy
// Basically we deflate all monitors that are not busy.
// An adaptive profile-based deflation policy could be used if needed
static void deflate_idle_monitors(DeflateMonitorCounters* counters);
+ static void deflate_idle_monitors_using_JT();
+ static void deflate_global_idle_monitors_using_JT();
+ static void deflate_per_thread_idle_monitors_using_JT(JavaThread* target);
+ static void deflate_common_idle_monitors_using_JT(bool is_global, JavaThread* target);
static void deflate_thread_local_monitors(Thread* thread, DeflateMonitorCounters* counters);
static void prepare_deflate_idle_monitors(DeflateMonitorCounters* counters);
static void finish_deflate_idle_monitors(DeflateMonitorCounters* counters);
// For a given monitor list: global or per-thread, deflate idle monitors
static int deflate_monitor_list(ObjectMonitor** list_p,
int* count_p,
ObjectMonitor** free_head_p,
ObjectMonitor** free_tail_p);
+ // For a given in-use monitor list: global or per-thread, deflate idle
+ // monitors using a JavaThread.
+ static int deflate_monitor_list_using_JT(ObjectMonitor** list_p,
+ int* count_p,
+ ObjectMonitor** free_head_p,
+ ObjectMonitor** free_tail_p,
+ ObjectMonitor** saved_mid_in_use_p);
static bool deflate_monitor(ObjectMonitor* mid, oop obj,
ObjectMonitor** free_head_p,
ObjectMonitor** free_tail_p);
! static bool deflate_monitor_using_JT(ObjectMonitor* mid,
! ObjectMonitor** free_head_p,
! ObjectMonitor** free_tail_p);
! static bool is_async_deflation_needed();
! static bool is_safepoint_deflation_needed();
! static bool is_async_deflation_requested() { return _is_async_deflation_requested; }
! static bool is_special_deflation_requested() { return _is_special_deflation_requested; }
! static void set_is_async_deflation_requested(bool new_value) { _is_async_deflation_requested = new_value; }
! static void set_is_special_deflation_requested(bool new_value) { _is_special_deflation_requested = new_value; }
! static jlong time_since_last_async_deflation_ms();
static void oops_do(OopClosure* f);
// Process oops in thread local used monitors
static void thread_local_used_oops_do(Thread* thread, OopClosure* f);
// debugging
static void audit_and_print_stats(bool on_exit);
static void chk_free_entry(JavaThread* jt, ObjectMonitor* n,
outputStream * out, int *error_cnt_p);
static void chk_global_free_list_and_count(outputStream * out,
int *error_cnt_p);
+ static void chk_global_wait_list_and_count(outputStream * out,
+ int *error_cnt_p);
static void chk_global_in_use_list_and_count(outputStream * out,
int *error_cnt_p);
static void chk_in_use_entry(JavaThread* jt, ObjectMonitor* n,
outputStream * out, int *error_cnt_p);
static void chk_per_thread_in_use_list_and_count(JavaThread *jt,
*** 167,182 ****
--- 189,209 ----
int *error_cnt_p);
static void log_in_use_monitor_details(outputStream * out);
static int log_monitor_list_counts(outputStream * out);
static int verify_objmon_isinpool(ObjectMonitor *addr) PRODUCT_RETURN0;
+ static void do_safepoint_work(DeflateMonitorCounters* counters);
+
private:
friend class SynchronizerTest;
enum { _BLOCKSIZE = 128 };
// global list of blocks of monitors
static PaddedObjectMonitor* g_block_list;
+ static volatile bool _is_async_deflation_requested;
+ static volatile bool _is_special_deflation_requested;
+ static jlong _last_async_deflation_time_ns;
// Function to prepend new blocks to the appropriate lists:
static void prepend_block_to_lists(PaddedObjectMonitor* new_blk);
// Process oops in all global used monitors (i.e. moribund thread's monitors)
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