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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 com.android.browser.platformsupport.Process;
import com.android.browser.platformsupport.WebAddress;
import android.os.Debug;
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");
}
}
}
}
}
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