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changeset 13731:9161ed8ce796

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Add graal-specific option -XX:+GPUOffload to trigger all GPU offload functionality. Cleanup function to decide GPU offload. Exclude GPU sources from nongraal builds.
author S.Bharadwaj Yadavalli <bharadwaj.yadavalli@oracle.com>
date Wed, 22 Jan 2014 16:06:47 -0500
parents 168976cae9ce
children 64fa70319890
files graal/com.oracle.graal.hotspot.ptx/src/com/oracle/graal/hotspot/ptx/PTXHotSpotBackend.java graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/bridge/VMToCompilerImpl.java make/bsd/makefiles/vm.make make/linux/makefiles/vm.make make/solaris/makefiles/vm.make src/share/vm/compiler/compileBroker.cpp src/share/vm/graal/graalGlobals.hpp src/share/vm/oops/method.cpp src/share/vm/oops/method.hpp src/share/vm/runtime/compilationPolicy.cpp src/share/vm/runtime/compilationPolicy.hpp src/share/vm/runtime/globals.hpp src/share/vm/runtime/thread.cpp
diffstat 13 files changed, 98 insertions(+), 83 deletions(-) [+]
line wrap: on
line diff
--- a/graal/com.oracle.graal.hotspot.ptx/src/com/oracle/graal/hotspot/ptx/PTXHotSpotBackend.java	Wed Jan 22 15:27:31 2014 +0100
+++ b/graal/com.oracle.graal.hotspot.ptx/src/com/oracle/graal/hotspot/ptx/PTXHotSpotBackend.java	Wed Jan 22 16:06:47 2014 -0500
@@ -148,7 +148,7 @@
             }
 
             private boolean canOffloadToGPU(ResolvedJavaMethod method) {
-                return method.getName().contains("lambda$main$") & method.isSynthetic();
+                return method.getName().contains("lambda$") & method.isSynthetic();
             }
         };
     }
--- a/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/bridge/VMToCompilerImpl.java	Wed Jan 22 15:27:31 2014 +0100
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/bridge/VMToCompilerImpl.java	Wed Jan 22 16:06:47 2014 -0500
@@ -556,9 +556,8 @@
                 int id = allocateCompileTaskId(method, entryBCI);
                 HotSpotBackend backend = runtime.getHostBackend();
                 CompilationTask task = new CompilationTask(backend, method, entryBCI, id);
-                boolean isLambdaMethod = (method.getName().contains("lambda$main$") & method.isSynthetic());
 
-                if (blocking || isLambdaMethod) {
+                if (blocking) {
                     task.runCompilation(true);
                 } else {
                     try {
--- a/make/bsd/makefiles/vm.make	Wed Jan 22 15:27:31 2014 +0100
+++ b/make/bsd/makefiles/vm.make	Wed Jan 22 16:06:47 2014 -0500
@@ -222,20 +222,22 @@
 
 ifneq ($(INCLUDE_GRAAL), true)
   GRAAL_SPECIFIC_FILES   := graal\*
+  GRAAL_SPECIFIC_GPU_FILES  := gpu\* ptx\* hsail\*
 else
   GRAAL_SPECIFIC_FILES   :=
+  GRAAL_SPECIFIC_GPU_FILES  :=
 endif
 
 # Always exclude these.
 Src_Files_EXCLUDE += jsig.c jvmtiEnvRecommended.cpp jvmtiEnvStub.cpp
 
 # Exclude per type.
-Src_Files_EXCLUDE/CORE      := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) ciTypeFlow.cpp
-Src_Files_EXCLUDE/COMPILER1 := $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) ciTypeFlow.cpp
-Src_Files_EXCLUDE/COMPILER2 := $(COMPILER1_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES)
-Src_Files_EXCLUDE/TIERED    := $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES)
-Src_Files_EXCLUDE/ZERO      := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) ciTypeFlow.cpp
-Src_Files_EXCLUDE/SHARK     := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES)
+Src_Files_EXCLUDE/CORE      := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) $(GRAAL_SPECIFIC_GPU_FILES) ciTypeFlow.cpp
+Src_Files_EXCLUDE/COMPILER1 := $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) $(GRAAL_SPECIFIC_GPU_FILES) ciTypeFlow.cpp
+Src_Files_EXCLUDE/COMPILER2 := $(COMPILER1_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) $(GRAAL_SPECIFIC_GPU_FILES)
+Src_Files_EXCLUDE/TIERED    := $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) $(GRAAL_SPECIFIC_GPU_FILES)
+Src_Files_EXCLUDE/ZERO      := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) $(GRAAL_SPECIFIC_GPU_FILES) ciTypeFlow.cpp
+Src_Files_EXCLUDE/SHARK     := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) $(GRAAL_SPECIFIC_GPU_FILES)
 Src_Files_EXCLUDE/GRAAL     := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) ciTypeFlow.cpp
 
 Src_Files_EXCLUDE +=  $(Src_Files_EXCLUDE/$(TYPE))
--- a/make/linux/makefiles/vm.make	Wed Jan 22 15:27:31 2014 +0100
+++ b/make/linux/makefiles/vm.make	Wed Jan 22 16:06:47 2014 -0500
@@ -201,21 +201,23 @@
 ZERO_SPECIFIC_FILES      := zero
 
 ifneq ($(INCLUDE_GRAAL), true)
-  GRAAL_SPECIFIC_FILES   := graal\*
+  GRAAL_SPECIFIC_FILES   := graal\* 
+  GRAAL_SPECIFIC_GPU_FILES  := gpu\* ptx\* hsail\*
 else
   GRAAL_SPECIFIC_FILES   :=
+  GRAAL_SPECIFIC_GPU_FILES   :=
 endif
 
 # Always exclude these.
 Src_Files_EXCLUDE += jsig.c jvmtiEnvRecommended.cpp jvmtiEnvStub.cpp
 
 # Exclude per type.
-Src_Files_EXCLUDE/CORE      := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) ciTypeFlow.cpp
-Src_Files_EXCLUDE/COMPILER1 := $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) ciTypeFlow.cpp
-Src_Files_EXCLUDE/COMPILER2 := $(COMPILER1_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES)
-Src_Files_EXCLUDE/TIERED    := $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES)
-Src_Files_EXCLUDE/ZERO      := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) ciTypeFlow.cpp
-Src_Files_EXCLUDE/SHARK     := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES)
+Src_Files_EXCLUDE/CORE      := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) $(GRAAL_SPECIFIC_GPU_FILES) ciTypeFlow.cpp
+Src_Files_EXCLUDE/COMPILER1 := $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) $(GRAAL_SPECIFIC_GPU_FILES) ciTypeFlow.cpp
+Src_Files_EXCLUDE/COMPILER2 := $(COMPILER1_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) $(GRAAL_SPECIFIC_GPU_FILES)
+Src_Files_EXCLUDE/TIERED    := $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) $(GRAAL_SPECIFIC_GPU_FILES)
+Src_Files_EXCLUDE/ZERO      := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) $(GRAAL_SPECIFIC_GPU_FILES) ciTypeFlow.cpp
+Src_Files_EXCLUDE/SHARK     := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) $(GRAAL_SPECIFIC_GPU_FILES)
 Src_Files_EXCLUDE/GRAAL     := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) ciTypeFlow.cpp
 
 Src_Files_EXCLUDE +=  $(Src_Files_EXCLUDE/$(TYPE))
--- a/make/solaris/makefiles/vm.make	Wed Jan 22 15:27:31 2014 +0100
+++ b/make/solaris/makefiles/vm.make	Wed Jan 22 16:06:47 2014 -0500
@@ -219,17 +219,18 @@
 SHARK_SPECIFIC_FILES     := shark
 ZERO_SPECIFIC_FILES      := zero
 GRAAL_SPECIFIC_FILES     := graal
+GRAAL_SPECIFIC_GPU_FILES  := gpu\* ptx\* hsail\*
 
 # Always exclude these.
 Src_Files_EXCLUDE := dtrace jsig.c jvmtiEnvRecommended.cpp jvmtiEnvStub.cpp
 
 # Exclude per type.
-Src_Files_EXCLUDE/CORE      := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) ciTypeFlow.cpp
-Src_Files_EXCLUDE/COMPILER1 := $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) ciTypeFlow.cpp
-Src_Files_EXCLUDE/COMPILER2 := $(COMPILER1_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES)
-Src_Files_EXCLUDE/TIERED    := $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES)
-Src_Files_EXCLUDE/ZERO      := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) ciTypeFlow.cpp
-Src_Files_EXCLUDE/SHARK     := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES)
+Src_Files_EXCLUDE/CORE      := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) $(GRAAL_SPECIFIC_GPU_FILES) ciTypeFlow.cpp
+Src_Files_EXCLUDE/COMPILER1 := $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) $(GRAAL_SPECIFIC_GPU_FILES) ciTypeFlow.cpp
+Src_Files_EXCLUDE/COMPILER2 := $(COMPILER1_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) $(GRAAL_SPECIFIC_GPU_FILES)
+Src_Files_EXCLUDE/TIERED    := $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) $(GRAAL_SPECIFIC_GPU_FILES)
+Src_Files_EXCLUDE/ZERO      := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) $(GRAAL_SPECIFIC_GPU_FILES) ciTypeFlow.cpp
+Src_Files_EXCLUDE/SHARK     := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(GRAAL_SPECIFIC_FILES) $(GRAAL_SPECIFIC_GPU_FILES)
 Src_Files_EXCLUDE/GRAAL     := $(COMPILER1_SPECIFIC_FILES) $(COMPILER2_SPECIFIC_FILES) $(ZERO_SPECIFIC_FILES) $(SHARK_SPECIFIC_FILES) ciTypeFlow.cpp
 
 Src_Files_EXCLUDE +=  $(Src_Files_EXCLUDE/$(TYPE))
--- a/src/share/vm/compiler/compileBroker.cpp	Wed Jan 22 15:27:31 2014 +0100
+++ b/src/share/vm/compiler/compileBroker.cpp	Wed Jan 22 16:06:47 2014 -0500
@@ -1144,7 +1144,9 @@
   }
 #ifdef GRAALVM
   if (!JavaThread::current()->is_graal_compiling()) {
-    GraalCompiler::instance()->compile_method(method, osr_bci, is_compile_blocking(method, osr_bci));
+    bool blockingCompilation = is_compile_blocking(method, osr_bci) ||
+      CompilationPolicy::can_be_offloaded_to_gpu(method);
+    GraalCompiler::instance()->compile_method(method, osr_bci, blockingCompilation);
   } else {
     // Recursive compile request => ignore.
   }
--- a/src/share/vm/graal/graalGlobals.hpp	Wed Jan 22 15:27:31 2014 +0100
+++ b/src/share/vm/graal/graalGlobals.hpp	Wed Jan 22 16:06:47 2014 -0500
@@ -79,6 +79,12 @@
   develop(bool, TraceUncollectedSpeculations, false,                        \
           "Print message when a failed speculation was not collected")      \
                                                                             \
+  product(bool, GPUOffload, false,                                          \
+          "Offload execution to GPU whenever possible")                     \
+                                                                            \
+  product(bool, TraceGPUInteraction, false,                                 \
+          "Trace external GPU Interaction")                                 \
+                                                                            \
 
 
 // Read default values for Graal globals
--- a/src/share/vm/oops/method.cpp	Wed Jan 22 15:27:31 2014 +0100
+++ b/src/share/vm/oops/method.cpp	Wed Jan 22 16:06:47 2014 -0500
@@ -2025,28 +2025,3 @@
   guarantee(md == NULL ||
       md->is_methodData(), "should be method data");
 }
-
-#ifdef GRAAL
-
-// Return true if the name of the method indicates that this is a
-// lambda method other than <init>. Lambda method is one with a name 
-// that starts with lambda$ and is synthetic.
-
-bool Method::is_lambda() const {
-  Symbol * klass_name = method_holder()->name();
-  Symbol * method_name = name();
-  ResourceMark rm;
-  if (klass_name != NULL) {
-    if (klass_name != NULL && method_name != NULL) {
-      const char* lambdaPrefix = "lambda$main$";
-      char* methodPrefix = strstr(method_name->as_C_string(), lambdaPrefix);
-      if (methodPrefix != 0) {
-        if ((strncmp(lambdaPrefix, methodPrefix, strlen(lambdaPrefix)) == 0) && is_synthetic()) {
-          return true;
-        }
-      }
-    }
-  }
-  return false;
-}
-#endif
--- a/src/share/vm/oops/method.hpp	Wed Jan 22 15:27:31 2014 +0100
+++ b/src/share/vm/oops/method.hpp	Wed Jan 22 16:06:47 2014 -0500
@@ -617,11 +617,6 @@
   // simultaneously. Use with caution.
   bool has_compiled_code() const                 { return code() != NULL; }
 
-#ifdef GRAAL
-  // Return true if the name of the method indicates that this is a
-  // lambda method other than <init>.
-  bool is_lambda() const;
-#endif
   // sizing
   static int header_size()                       { return sizeof(Method)/HeapWordSize; }
   static int size(bool is_native);
--- a/src/share/vm/runtime/compilationPolicy.cpp	Wed Jan 22 15:27:31 2014 +0100
+++ b/src/share/vm/runtime/compilationPolicy.cpp	Wed Jan 22 16:06:47 2014 -0500
@@ -105,30 +105,7 @@
 
   if (m->has_compiled_code()) return false;       // already compiled
 
-#ifdef GRAAL
-  // Check if this is a Lambda method that can be compiled to a GPU.
-  if (m->is_lambda()) {
-    // If GPU is available and the necessary linkage is available
-    // rerurn true indicatin that this method must be compiled.
-    if (gpu::is_available() && gpu::has_gpu_linkage()) {
-      if (TraceGPUInteraction) {
-        tty->print("Compiling Lambda method");
-        m->print_short_name();
-        switch (gpu::get_target_il_type()) {
-        case gpu::PTX :
-          tty->print_cr(" to PTX");
-          break;
-        case gpu::HSAIL :
-          tty->print_cr(" to HSAIL");
-          break;
-        default :
-          tty->print_cr(" to Unknown GPU!!!");
-        }
-      }
-      return true;
-    }
-  }
-#endif
+  if (CompilationPolicy::can_be_offloaded_to_gpu(m)) return true;
 
   if (!can_be_compiled(m, comp_level)) return false;
 
@@ -184,6 +161,58 @@
   return (result && can_be_compiled(m, comp_level));
 }
 
+bool CompilationPolicy::can_be_offloaded_to_gpu(methodHandle m) {
+#ifdef GRAAL
+  if (GPUOffload) {
+    // Check if this method can be offloaded to GPU.
+    // 1. Offload it to GPU if it is a Lambda method
+    if (m->is_synthetic()) {
+      // A lambda method is a syntheric method.
+      Symbol * klass_name = m->method_holder()->name();
+      Symbol * method_name = m->name();
+      bool offloadToGPU = false;
+      {
+        ResourceMark rm;
+        if (klass_name != NULL) {
+          if (klass_name != NULL && method_name != NULL) {
+            const char* lambdaPrefix = "lambda$";
+            char* methodPrefix = strstr(method_name->as_C_string(), lambdaPrefix);
+            if (methodPrefix != 0) {
+              if ((strncmp(lambdaPrefix, methodPrefix, strlen(lambdaPrefix)) == 0)) {
+                offloadToGPU = true;
+              }
+            }
+          }
+        }
+      }
+      if (offloadToGPU) {
+        // If GPU is available and the necessary linkage is available
+        // return true indicatin that this method must be compiled.
+        if (gpu::is_available() && gpu::has_gpu_linkage()) {
+          if (TraceGPUInteraction) {
+            tty->print("Compiling Lambda method ");
+            m->print_short_name();
+            switch (gpu::get_target_il_type()) {
+            case gpu::PTX :
+              tty->print_cr("to PTX");
+              break;
+            case gpu::HSAIL :
+              tty->print_cr("to HSAIL");
+              break;
+            default :
+              tty->print_cr("to Unknown GPU!!!");
+            }
+          }
+          return true;
+        }
+      }
+    }
+  }
+#endif
+
+  return false;
+}
+
 bool CompilationPolicy::is_compilation_enabled() {
   // NOTE: CompileBroker::should_compile_new_jobs() checks for UseCompiler
   return !delay_compilation_during_startup() && CompileBroker::should_compile_new_jobs();
--- a/src/share/vm/runtime/compilationPolicy.hpp	Wed Jan 22 15:27:31 2014 +0100
+++ b/src/share/vm/runtime/compilationPolicy.hpp	Wed Jan 22 16:06:47 2014 -0500
@@ -58,6 +58,9 @@
   static void set_policy(CompilationPolicy* policy) { _policy = policy; }
   static CompilationPolicy* policy()                { return _policy; }
 
+  // m is allowed to be offloaded to a gpu
+  static bool can_be_offloaded_to_gpu(methodHandle m);
+
   // Profiling
   elapsedTimer* accumulated_time() { return &_accumulated_time; }
   void print_time() PRODUCT_RETURN;
--- a/src/share/vm/runtime/globals.hpp	Wed Jan 22 15:27:31 2014 +0100
+++ b/src/share/vm/runtime/globals.hpp	Wed Jan 22 16:06:47 2014 -0500
@@ -3840,9 +3840,6 @@
   product(bool , AllowNonVirtualCalls, false,                               \
           "Obey the ACC_SUPER flag and allow invokenonvirtual calls")       \
                                                                             \
-  product(bool, TraceGPUInteraction, false,                                 \
-          "Trace external GPU Interaction")                                 \
-                                                                            \
   product(bool, UseHSAILSimulator, false,                                   \
           "Run code on HSAIL Simulator")                                    \
                                                                             \
--- a/src/share/vm/runtime/thread.cpp	Wed Jan 22 15:27:31 2014 +0100
+++ b/src/share/vm/runtime/thread.cpp	Wed Jan 22 16:06:47 2014 -0500
@@ -3394,9 +3394,13 @@
   jint parse_result = Arguments::parse(args);
   if (parse_result != JNI_OK) return parse_result;
 
-  // Probe for existance of supported GPU and initialize it if one
-  // exists.
-  gpu::init();
+#ifdef GRAAL
+  if (GPUOffload) {
+    // Probe for existance of supported GPU and initialize it if one
+    // exists.
+    gpu::init();
+  }
+#endif
 
   os::init_before_ergo();