8029436: CICompilerCount is not updated when the number of compiler threads is...

8029436: CICompilerCount is not updated when the number of compiler threads is adjusted to the number of CPUs
Summary: CICompilerCount is updated in AdvancedThresholdPolicy::initialize, SimpleThresholdPolicy::initialize and NonTieredCompPolicy::initialize. A warning is printed if the usersets both, CICompilerCount and CICompilerCountPerCPU.
Reviewed-by: kvn, twisti
Contributed-by: NTobias Hartmann <tobias.hartmann@oracle.com>

src/share/vm/runtime/advancedThresholdPolicy.cpp

@@ -53,7 +53,8 @@ void AdvancedThresholdPolicy::initialize() {
   }
 
   set_c1_count(MAX2(count / 3, 1));
-  set_c2_count(MAX2(count - count / 3, 1));
+  set_c2_count(MAX2(count - c1_count(), 1));
+  FLAG_SET_ERGO(intx, CICompilerCount, c1_count() + c2_count());
 
   // Some inlining tuning
 #ifdef X86

src/share/vm/runtime/arguments.cpp

@@ -2383,6 +2383,10 @@ bool Arguments::check_vm_args_consistency() {
   status &= verify_interval(NmethodSweepFraction, 1, ReservedCodeCacheSize/K, "NmethodSweepFraction");
   status &= verify_interval(NmethodSweepActivity, 0, 2000, "NmethodSweepActivity");
 
+  if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) {
+    warning("The VM option CICompilerCountPerCPU overrides CICompilerCount.");
+  }
+
   return status;
 }
 

src/share/vm/runtime/compilationPolicy.cpp

@@ -182,6 +182,7 @@ void NonTieredCompPolicy::initialize() {
     // max(log2(8)-1,1) = 2 compiler threads on an 8-way machine.
     // May help big-app startup time.
     _compiler_count = MAX2(log2_intptr(os::active_processor_count())-1,1);
+    FLAG_SET_ERGO(intx, CICompilerCount, _compiler_count);
   } else {
     _compiler_count = CICompilerCount;
   }

src/share/vm/runtime/simpleThresholdPolicy.cpp

@@ -142,7 +142,8 @@ void SimpleThresholdPolicy::initialize() {
     count = MAX2(log2_intptr(os::active_processor_count()), 1) * 3 / 2;
   }
   set_c1_count(MAX2(count / 3, 1));
-  set_c2_count(MAX2(count - count / 3, 1));
+  set_c2_count(MAX2(count - c1_count(), 1));
+  FLAG_SET_ERGO(intx, CICompilerCount, c1_count() + c2_count());
 }
 
 void SimpleThresholdPolicy::set_carry_if_necessary(InvocationCounter *counter) {