[JIT] trigger code cache sweep periodly

Summary: Trigger code cache sweep periodly to recovert jit quickly Test Plan: jittest case Reviewed-by: yueshi.zwj, zhuoren.wz Issue: dragonwell-project/dragonwell8#285 CR:
dragonwell-project · Jan 20, 2022 · 5ed8f2e · 5ed8f2e
1 parent 4d433ef
commit 5ed8f2e
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Showing 4 changed files with 28 additions and 1 deletion.
diff --git a/src/share/vm/runtime/globals_ext.hpp b/src/share/vm/runtime/globals_ext.hpp
@@ -155,7 +155,11 @@
                                                                             \
   diagnostic(ccstr, ClassLoaderModuleFieldName, "moduleName",               \
           "For distinguishing the instances of class loader")               \
-
+                                                                            \
+  product(intx, CodeSweeperTriggerTime, 0,                                  \
+          "code sweeper trigger period time (in seconds, "                  \
+          "0 means disable periodly trigger)" )                             \
+                                                                            \
   //add new AJVM specific flags here
 
 

diff --git a/src/share/vm/runtime/sweeper.cpp b/src/share/vm/runtime/sweeper.cpp
@@ -37,6 +37,7 @@
 #include "runtime/orderAccess.inline.hpp"
 #include "runtime/os.hpp"
 #include "runtime/sweeper.hpp"
+#include "runtime/task.hpp"
 #include "runtime/thread.inline.hpp"
 #include "runtime/vm_operations.hpp"
 #include "utilities/events.hpp"
@@ -674,3 +675,22 @@ void NMethodSweeper::print() {
                                                     _total_nof_c2_methods_reclaimed);
   tty->print_cr("  Total size of flushed methods:   " SIZE_FORMAT "kB", _total_flushed_size/K);
 }
+
+// support trigger code cache sweeper periodly
+class SweepTask : public PeriodicTask {
+public:
+    SweepTask() : PeriodicTask(CodeSweeperTriggerTime * 1000) {}
+    void task() {
+      VM_ForceSafepoint op;
+      VMThread::execute(&op);
+    }
+};
+
+void NMethodSweeper::periodly_sweep() {
+  if (!UseCodeCacheFlushing || CodeSweeperTriggerTime <= 0) {
+    return;
+  }
+
+  SweepTask *task = new SweepTask();
+  task->enroll();
+}
diff --git a/src/share/vm/runtime/sweeper.hpp b/src/share/vm/runtime/sweeper.hpp
@@ -95,6 +95,7 @@ class NMethodSweeper : public AllStatic {
   static const Tickspan peak_sweep_time()          { return _peak_sweep_time; }
   static const Tickspan peak_sweep_fraction_time() { return _peak_sweep_fraction_time; }
   static void log_sweep(const char* msg, const char* format = NULL, ...) ATTRIBUTE_PRINTF(2, 3);
+  static void periodly_sweep();
 
 #ifdef ASSERT
   static bool is_sweeping(nmethod* which) { return _current == which; }

diff --git a/src/share/vm/runtime/thread.cpp b/src/share/vm/runtime/thread.cpp
@@ -68,6 +68,7 @@
 #include "runtime/sharedRuntime.hpp"
 #include "runtime/statSampler.hpp"
 #include "runtime/stubRoutines.hpp"
+#include "runtime/sweeper.hpp"
 #include "runtime/task.hpp"
 #include "runtime/thread.inline.hpp"
 #include "runtime/threadCritical.hpp"
@@ -4113,6 +4114,7 @@ jint Threads::create_vm(JavaVMInitArgs* args, bool* canTryAgain) {
     call_initializeJGroupClass(CHECK_0);
   }
 #endif
+  NMethodSweeper::periodly_sweep();
 
   create_vm_timer.end();
 #ifdef ASSERT