jdk8-mips64-public/hotspot: comparison src/share/vm/runtime/safepoint.cpp

-:c7a3e57fdf4a
+:b985cbb00e68
 #include "code/nmethod.hpp"
 #include "code/pcDesc.hpp"
 #include "code/scopeDesc.hpp"
 #include "gc_interface/collectedHeap.hpp"
 #include "interpreter/interpreter.hpp"
+#include "jfr/jfrEvents.hpp"
 #include "memory/resourceArea.hpp"
 #include "memory/universe.inline.hpp"
 #include "oops/oop.inline.hpp"
 #include "oops/symbol.hpp"
 #include "runtime/compilationPolicy.hpp"
 #include "c1/c1_globals.hpp"
 #endif
 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
+template <typename E>
+static void set_current_safepoint_id(E* event, int adjustment = 0) {
+assert(event != NULL, "invariant");
+event->set_safepointId(SafepointSynchronize::safepoint_counter() + adjustment);
+}
+static void post_safepoint_begin_event(EventSafepointBegin* event,
+int thread_count,
+int critical_thread_count) {
+assert(event != NULL, "invariant");
+assert(event->should_commit(), "invariant");
+set_current_safepoint_id(event);
+event->set_totalThreadCount(thread_count);
+event->set_jniCriticalThreadCount(critical_thread_count);
+event->commit();
+}
+static void post_safepoint_cleanup_event(EventSafepointCleanup* event) {
+assert(event != NULL, "invariant");
+assert(event->should_commit(), "invariant");
+set_current_safepoint_id(event);
+event->commit();
+}
+static void post_safepoint_synchronize_event(EventSafepointStateSynchronization* event,
+int initial_number_of_threads,
+int threads_waiting_to_block,
+unsigned int iterations) {
+assert(event != NULL, "invariant");
+if (event->should_commit()) {
+// Group this event together with the ones committed after the counter is increased
+set_current_safepoint_id(event, 1);
+event->set_initialThreadCount(initial_number_of_threads);
+event->set_runningThreadCount(threads_waiting_to_block);
+event->set_iterations(iterations);
+event->commit();
+}
+}
+static void post_safepoint_wait_blocked_event(EventSafepointWaitBlocked* event,
+int initial_threads_waiting_to_block) {
+assert(event != NULL, "invariant");
+assert(event->should_commit(), "invariant");
+set_current_safepoint_id(event);
+event->set_runningThreadCount(initial_threads_waiting_to_block);
+event->commit();
+}
+static void post_safepoint_cleanup_task_event(EventSafepointCleanupTask* event,
+const char* name) {
+assert(event != NULL, "invariant");
+if (event->should_commit()) {
+set_current_safepoint_id(event);
+event->set_name(name);
+event->commit();
+}
+}
+static void post_safepoint_end_event(EventSafepointEnd* event) {
+assert(event != NULL, "invariant");
+if (event->should_commit()) {
+// Group this event together with the ones committed before the counter increased
+set_current_safepoint_id(event, -1);
+event->commit();
+}
+}
 // --------------------------------------------------------------------------------------------------
 // Implementation of Safepoint begin/end
 SafepointSynchronize::SynchronizeState volatile SafepointSynchronize::_state = SafepointSynchronize::_not_synchronized;
 volatile int  SafepointSynchronize::_waiting_to_block = 0;
 static volatile int TryingToBlock = 0 ;    // proximate value -- for advisory use only
 static bool timeout_error_printed = false;
 // Roll all threads forward to a safepoint and suspend them all
 void SafepointSynchronize::begin() {
+EventSafepointBegin begin_event;
 Thread* myThread = Thread::current();
 assert(myThread->is_VM_thread(), "Only VM thread may execute a safepoint");
 if (PrintSafepointStatistics || PrintSafepointStatisticsTimeout > 0) {
 _safepoint_begin_time = os::javaTimeNanos();
 //  5. In VM or Transitioning between states
 //     If a Java thread is currently running in the VM or transitioning
 //     between states, the safepointing code will wait for the thread to
 //     block itself when it attempts transitions to a new state.
 //
+EventSafepointStateSynchronization sync_event;
+int initial_running = 0;
 _state            = _synchronizing;
 OrderAccess::fence();
 // Flush all thread states to memory
 if (!UseMembar) {
 }
 if (TraceSafepoint && Verbose) cur_state->print();
 }
 }
-if (PrintSafepointStatistics && iterations == 0) {
+if (iterations == 0) {
-begin_statistics(nof_threads, still_running);
+initial_running = still_running;
+if (PrintSafepointStatistics) {
+begin_statistics(nof_threads, still_running);
+}
 }
 if (still_running > 0) {
 // Check for if it takes to long
 if (SafepointTimeout && safepoint_limit_time < os::javaTimeNanos()) {
 if (PrintSafepointStatistics) {
 update_statistics_on_spin_end();
 }
+if (sync_event.should_commit()) {
+post_safepoint_synchronize_event(&sync_event, initial_running, _waiting_to_block, iterations);
+}
 // wait until all threads are stopped
-while (_waiting_to_block > 0) {
+{
-if (TraceSafepoint) tty->print_cr("Waiting for %d thread(s) to block", _waiting_to_block);
+EventSafepointWaitBlocked wait_blocked_event;
-if (!SafepointTimeout || timeout_error_printed) {
+int initial_waiting_to_block = _waiting_to_block;
-Safepoint_lock->wait(true);  // true, means with no safepoint checks
-} else {
+while (_waiting_to_block > 0) {
-// Compute remaining time
+if (TraceSafepoint) tty->print_cr("Waiting for %d thread(s) to block", _waiting_to_block);
-jlong remaining_time = safepoint_limit_time - os::javaTimeNanos();
+if (!SafepointTimeout || timeout_error_printed) {
+Safepoint_lock->wait(true);  // true, means with no safepoint checks
-// If there is no remaining time, then there is an error
+} else {
-if (remaining_time < 0 || Safepoint_lock->wait(true, remaining_time / MICROUNITS)) {
+// Compute remaining time
-print_safepoint_timeout(_blocking_timeout);
+jlong remaining_time = safepoint_limit_time - os::javaTimeNanos();
+// If there is no remaining time, then there is an error
+if (remaining_time < 0 || Safepoint_lock->wait(true, remaining_time / MICROUNITS)) {
+print_safepoint_timeout(_blocking_timeout);
+}
 }
 }
-}
+assert(_waiting_to_block == 0, "sanity check");
-assert(_waiting_to_block == 0, "sanity check");
 #ifndef PRODUCT
 if (SafepointTimeout) {
 jlong current_time = os::javaTimeNanos();
 if (safepoint_limit_time < current_time) {
 tty->print_cr("# SafepointSynchronize: Finished after "
 INT64_FORMAT_W(6) " ms",
 ((current_time - safepoint_limit_time) / MICROUNITS +
 SafepointTimeoutDelay));
 }
 }
 #endif
 assert((_safepoint_counter & 0x1) == 0, "must be even");
 assert(Threads_lock->owned_by_self(), "must hold Threads_lock");
 _safepoint_counter ++;
 // Record state
 _state = _synchronized;
 OrderAccess::fence();
+if (wait_blocked_event.should_commit()) {
+post_safepoint_wait_blocked_event(&wait_blocked_event, initial_waiting_to_block);
+}
+}
 #ifdef ASSERT
 for (JavaThread *cur = Threads::first(); cur != NULL; cur = cur->next()) {
 // make sure all the threads were visited
 assert(cur->was_visited_for_critical_count(), "missed a thread");
 if (PrintSafepointStatistics) {
 update_statistics_on_sync_end(os::javaTimeNanos());
 }
 // Call stuff that needs to be run when a safepoint is just about to be completed
-do_cleanup_tasks();
+{
+EventSafepointCleanup cleanup_event;
+do_cleanup_tasks();
+if (cleanup_event.should_commit()) {
+post_safepoint_cleanup_event(&cleanup_event);
+}
+}
 if (PrintSafepointStatistics) {
 // Record how much time spend on the above cleanup tasks
 update_statistics_on_cleanup_end(os::javaTimeNanos());
 }
+if (begin_event.should_commit()) {
+post_safepoint_begin_event(&begin_event, nof_threads, _current_jni_active_count);
+}
 }
 // Wake up all threads, so they are ready to resume execution after the safepoint
 // operation has been carried out
 void SafepointSynchronize::end() {
 assert(Threads_lock->owned_by_self(), "must hold Threads_lock");
 assert((_safepoint_counter & 0x1) == 1, "must be odd");
+EventSafepointEnd event;
 _safepoint_counter ++;
 // memory fence isn't required here since an odd _safepoint_counter
 // value can do no harm and a fence is issued below anyway.
 DEBUG_ONLY(Thread* myThread = Thread::current();)
 }
 #endif // INCLUDE_ALL_GCS
 // record this time so VMThread can keep track how much time has elasped
 // since last safepoint.
 _end_of_last_safepoint = os::javaTimeMillis();
+if (event.should_commit()) {
+post_safepoint_end_event(&event);
+}
 }
 bool SafepointSynchronize::is_cleanup_needed() {
 // Need a safepoint if some inline cache buffers is non-empty
 if (!InlineCacheBuffer::is_empty()) return true;
 // Various cleaning tasks that should be done periodically at safepoints
 void SafepointSynchronize::do_cleanup_tasks() {
 {
-TraceTime t1("deflating idle monitors", TraceSafepointCleanupTime);
+const char* name = "deflating idle monitors";
+EventSafepointCleanupTask event;
+TraceTime t1(name, TraceSafepointCleanupTime);
 ObjectSynchronizer::deflate_idle_monitors();
+if (event.should_commit()) {
+post_safepoint_cleanup_task_event(&event, name);
+}
 }
 {
-TraceTime t2("updating inline caches", TraceSafepointCleanupTime);
+const char* name = "updating inline caches";
+EventSafepointCleanupTask event;
+TraceTime t2(name, TraceSafepointCleanupTime);
 InlineCacheBuffer::update_inline_caches();
+if (event.should_commit()) {
+post_safepoint_cleanup_task_event(&event, name);
+}
 }
 {
-TraceTime t3("compilation policy safepoint handler", TraceSafepointCleanupTime);
+const char* name = "compilation policy safepoint handler";
+EventSafepointCleanupTask event;
+TraceTime t3(name, TraceSafepointCleanupTime);
 CompilationPolicy::policy()->do_safepoint_work();
+if (event.should_commit()) {
+post_safepoint_cleanup_task_event(&event, name);
+}
 }
 {
-TraceTime t4("mark nmethods", TraceSafepointCleanupTime);
+const char* name = "mark nmethods";
+EventSafepointCleanupTask event;
+TraceTime t4(name, TraceSafepointCleanupTime);
 NMethodSweeper::mark_active_nmethods();
+if (event.should_commit()) {
+post_safepoint_cleanup_task_event(&event, name);
+}
 }
 if (SymbolTable::needs_rehashing()) {
-TraceTime t5("rehashing symbol table", TraceSafepointCleanupTime);
+const char* name = "rehashing symbol table";
+EventSafepointCleanupTask event;
+TraceTime t5(name, TraceSafepointCleanupTime);
 SymbolTable::rehash_table();
+if (event.should_commit()) {
+post_safepoint_cleanup_task_event(&event, name);
+}
 }
 if (StringTable::needs_rehashing()) {
-TraceTime t6("rehashing string table", TraceSafepointCleanupTime);
+const char* name = "rehashing string table";
+EventSafepointCleanupTask event;
+TraceTime t6(name, TraceSafepointCleanupTime);
 StringTable::rehash_table();
+if (event.should_commit()) {
+post_safepoint_cleanup_task_event(&event, name);
+}
 }
 // rotate log files?
 if (UseGCLogFileRotation) {
 gclog_or_tty->rotate_log(false);

Mercurial > jdk8-mips64-public > hotspot / file comparison

comparison: src/share/vm/runtime/safepoint.cpp

src/share/vm/runtime/safepoint.cpp