# HG changeset patch
# User Doug Simon <doug.simon@oracle.com>
# Date 1407234895 -7200
# Node ID 7e8ecfe7d2e57080db3dee0359f1b50ae70c7b99
# Parent  2f7464a458b4e94c67c0c40a926292408340a4a9
preliminary compiler memory usage benchmark

diff -r 2f7464a458b4 -r 7e8ecfe7d2e5 graal/com.oracle.graal.compiler.test/src/com/oracle/graal/compiler/test/MemoryUsageBenchmark.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.compiler.test/src/com/oracle/graal/compiler/test/MemoryUsageBenchmark.java	Tue Aug 05 12:34:55 2014 +0200
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.graal.compiler.test;
+
+import static com.oracle.graal.debug.internal.MemUseTrackerImpl.*;
+
+import java.lang.reflect.*;
+
+import com.oracle.graal.api.code.*;
+import com.oracle.graal.nodes.*;
+
+/**
+ * Used to benchmark memory usage during Graal compilation.
+ */
+public class MemoryUsageBenchmark extends GraalCompilerTest {
+
+    public static int simple(int a, int b) {
+        return a + b;
+    }
+
+    public static int complex(CharSequence cs) {
+        if (cs instanceof String) {
+            return cs.hashCode();
+        }
+        int[] hash = {0};
+        cs.chars().forEach(c -> hash[0] += c);
+        return hash[0];
+    }
+
+    static class MemoryUsageCloseable implements AutoCloseable {
+
+        private final long start;
+        private final String name;
+
+        public MemoryUsageCloseable(String name) {
+            this.name = name;
+            this.start = getCurrentThreadAllocatedBytes();
+        }
+
+        @Override
+        public void close() {
+            long end = getCurrentThreadAllocatedBytes();
+            long allocated = end - start;
+            System.out.println(name + ": " + allocated);
+        }
+    }
+
+    public static void main(String[] args) {
+        new MemoryUsageBenchmark().run();
+    }
+
+    private void doCompilation(StructuredGraph graph) {
+        CompilationResult compResult = super.compile(graph.method(), graph);
+        addMethod(graph.method(), compResult);
+    }
+
+    private void compileAndTime(String methodName) {
+        Method method = getMethod(methodName);
+        StructuredGraph graph = parse(method);
+
+        try (MemoryUsageCloseable c = new MemoryUsageCloseable(methodName + "[cold]")) {
+            doCompilation(graph);
+        }
+
+        // Warm up compiler for this compilation
+        for (int i = 0; i < 10; i++) {
+            doCompilation(graph);
+        }
+
+        try (MemoryUsageCloseable c = new MemoryUsageCloseable(methodName + "[warm]")) {
+            doCompilation(graph);
+        }
+    }
+
+    public void run() {
+        compileAndTime("simple");
+        compileAndTime("complex");
+    }
+}
diff -r 2f7464a458b4 -r 7e8ecfe7d2e5 graal/com.oracle.graal.debug/src/com/oracle/graal/debug/internal/MemUseTrackerImpl.java
--- a/graal/com.oracle.graal.debug/src/com/oracle/graal/debug/internal/MemUseTrackerImpl.java	Tue Aug 05 12:34:15 2014 +0200
+++ b/graal/com.oracle.graal.debug/src/com/oracle/graal/debug/internal/MemUseTrackerImpl.java	Tue Aug 05 12:34:55 2014 +0200
@@ -38,7 +38,7 @@
      */
     private static final long threadMXBeanOverhead = -getCurrentThreadAllocatedBytes() + getCurrentThreadAllocatedBytes();
 
-    private static long getCurrentThreadAllocatedBytes() {
+    public static long getCurrentThreadAllocatedBytes() {
         return threadMXBean.getThreadAllocatedBytes(currentThread().getId()) - threadMXBeanOverhead;
     }