# HG changeset patch
# User iignatyev
# Date 1414942950 -10800
# Node ID 7e2e2b955d15629bc553af6d2078f9d0824e0717
# Parent  603dbcf4f5479769d42b2ad5818a30a3fa5023d6
8036913: make DeoptimizeALot dependent on number of threads
Reviewed-by: kvn, shade

diff -r 603dbcf4f547 -r 7e2e2b955d15 hotspot/src/share/vm/runtime/interfaceSupport.cpp
--- a/hotspot/src/share/vm/runtime/interfaceSupport.cpp	Fri Oct 31 16:51:57 2014 -0700
+++ b/hotspot/src/share/vm/runtime/interfaceSupport.cpp	Sun Nov 02 18:42:30 2014 +0300
@@ -187,19 +187,22 @@
 
 # endif
 
-
+// invocation counter for InterfaceSupport::deoptimizeAll/zombieAll functions
 int deoptimizeAllCounter = 0;
 int zombieAllCounter = 0;
 
-
 void InterfaceSupport::zombieAll() {
-  if (is_init_completed() && zombieAllCounter > ZombieALotInterval) {
+  // This method is called by all threads when a thread make
+  // transition to VM state (for example, runtime calls).
+  // Divide number of calls by number of threads to avoid
+  // dependence of ZombieAll events frequency on number of threads.
+  int value = zombieAllCounter / Threads::number_of_threads();
+  if (is_init_completed() && value > ZombieALotInterval) {
     zombieAllCounter = 0;
     VM_ZombieAll op;
     VMThread::execute(&op);
-  } else {
-    zombieAllCounter++;
   }
+  zombieAllCounter++;
 }
 
 void InterfaceSupport::unlinkSymbols() {
@@ -208,12 +211,17 @@
 }
 
 void InterfaceSupport::deoptimizeAll() {
-  if (is_init_completed() ) {
-    if (DeoptimizeALot && deoptimizeAllCounter > DeoptimizeALotInterval) {
+  // This method is called by all threads when a thread make
+  // transition to VM state (for example, runtime calls).
+  // Divide number of calls by number of threads to avoid
+  // dependence of DeoptimizeAll events frequency on number of threads.
+  int value = deoptimizeAllCounter / Threads::number_of_threads();
+  if (is_init_completed()) {
+    if (DeoptimizeALot && value > DeoptimizeALotInterval) {
       deoptimizeAllCounter = 0;
       VM_DeoptimizeAll op;
       VMThread::execute(&op);
-    } else if (DeoptimizeRandom && (deoptimizeAllCounter & 0x1f) == (os::random() & 0x1f)) {
+    } else if (DeoptimizeRandom && (value & 0x1F) == (os::random() & 0x1F)) {
       VM_DeoptimizeAll op;
       VMThread::execute(&op);
     }