1 files changed, 133 insertions, 0 deletions
diff --git a/src/com/android/browser/Performance.java b/src/com/android/browser/Performance.java
new file mode 100644
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+++ b/src/com/android/browser/Performance.java
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+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.browser;
+
+import android.net.WebAddress;
+import android.os.Debug;
+import android.os.Process;
+import android.os.SystemClock;
+import android.util.Log;
+
+/**
+ * Performance analysis
+ */
+public class Performance {
+
+    private static final String LOGTAG = "browser";
+
+    private final static boolean LOGD_ENABLED =
+            com.android.browser.Browser.LOGD_ENABLED;
+
+    private static boolean mInTrace;
+
+    // Performance probe
+    private static final int[] SYSTEM_CPU_FORMAT = new int[] {
+            Process.PROC_SPACE_TERM | Process.PROC_COMBINE,
+            Process.PROC_SPACE_TERM | Process.PROC_OUT_LONG, // 1: user time
+            Process.PROC_SPACE_TERM | Process.PROC_OUT_LONG, // 2: nice time
+            Process.PROC_SPACE_TERM | Process.PROC_OUT_LONG, // 3: sys time
+            Process.PROC_SPACE_TERM | Process.PROC_OUT_LONG, // 4: idle time
+            Process.PROC_SPACE_TERM | Process.PROC_OUT_LONG, // 5: iowait time
+            Process.PROC_SPACE_TERM | Process.PROC_OUT_LONG, // 6: irq time
+            Process.PROC_SPACE_TERM | Process.PROC_OUT_LONG  // 7: softirq time
+    };
+
+    private static long mStart;
+    private static long mProcessStart;
+    private static long mUserStart;
+    private static long mSystemStart;
+    private static long mIdleStart;
+    private static long mIrqStart;
+
+    private static long mUiStart;
+
+    static void tracePageStart(String url) {
+        if (BrowserSettings.getInstance().isTracing()) {
+            String host;
+            try {
+                WebAddress uri = new WebAddress(url);
+                host = uri.getHost();
+            } catch (android.net.ParseException ex) {
+                host = "browser";
+            }
+            host = host.replace('.', '_');
+            host += ".trace";
+            mInTrace = true;
+            Debug.startMethodTracing(host, 20 * 1024 * 1024);
+        }
+    }
+
+    static void tracePageFinished() {
+        if (mInTrace) {
+            mInTrace = false;
+            Debug.stopMethodTracing();
+        }
+    }
+
+    static void onPageStarted() {
+        mStart = SystemClock.uptimeMillis();
+        mProcessStart = Process.getElapsedCpuTime();
+        long[] sysCpu = new long[7];
+        if (Process.readProcFile("/proc/stat", SYSTEM_CPU_FORMAT, null, sysCpu, null)) {
+            mUserStart = sysCpu[0] + sysCpu[1];
+            mSystemStart = sysCpu[2];
+            mIdleStart = sysCpu[3];
+            mIrqStart = sysCpu[4] + sysCpu[5] + sysCpu[6];
+        }
+        mUiStart = SystemClock.currentThreadTimeMillis();
+    }
+
+    static void onPageFinished(String url) {
+        long[] sysCpu = new long[7];
+        if (Process.readProcFile("/proc/stat", SYSTEM_CPU_FORMAT, null, sysCpu, null)) {
+            String uiInfo =
+                    "UI thread used " + (SystemClock.currentThreadTimeMillis() - mUiStart) + " ms";
+            if (LOGD_ENABLED) {
+                Log.d(LOGTAG, uiInfo);
+            }
+            // The string that gets written to the log
+            String performanceString =
+                    "It took total " + (SystemClock.uptimeMillis() - mStart)
+                            + " ms clock time to load the page." + "\nbrowser process used "
+                            + (Process.getElapsedCpuTime() - mProcessStart)
+                            + " ms, user processes used " + (sysCpu[0] + sysCpu[1] - mUserStart)
+                            * 10 + " ms, kernel used " + (sysCpu[2] - mSystemStart) * 10
+                            + " ms, idle took " + (sysCpu[3] - mIdleStart) * 10
+                            + " ms and irq took " + (sysCpu[4] + sysCpu[5] + sysCpu[6] - mIrqStart)
+                            * 10 + " ms, " + uiInfo;
+            if (LOGD_ENABLED) {
+                Log.d(LOGTAG, performanceString + "\nWebpage: " + url);
+            }
+            if (url != null) {
+                // strip the url to maintain consistency
+                String newUrl = new String(url);
+                if (newUrl.startsWith("http://www.")) {
+                    newUrl = newUrl.substring(11);
+                } else if (newUrl.startsWith("http://")) {
+                    newUrl = newUrl.substring(7);
+                } else if (newUrl.startsWith("https://www.")) {
+                    newUrl = newUrl.substring(12);
+                } else if (newUrl.startsWith("https://")) {
+                    newUrl = newUrl.substring(8);
+                }
+                if (LOGD_ENABLED) {
+                    Log.d(LOGTAG, newUrl + " loaded");
+                }
+            }
+        }
+    }
+}