Track and report CPU usage

1 files changed, 29 insertions, 0 deletions

diff --git a/mmtest/src/org/linaro/mmtest/MultimediaTest.java b/mmtest/src/org/linaro/mmtest/MultimediaTest.java
index 6644c2f..6c4c540 100644
--- a/mmtest/src/org/linaro/mmtest/MultimediaTest.java
+++ b/mmtest/src/org/linaro/mmtest/MultimediaTest.java
@@ -8,8 +8,10 @@ import android.util.Log;
 import android.media.AudioManager;
 import android.media.MediaPlayer;
 import android.media.MediaPlayer.OnCompletionListener;
+import android.os.Process;
 import android.view.SurfaceView;
 
+import java.io.RandomAccessFile;
 import java.lang.Math;
 import java.util.List;
 
@@ -19,6 +21,7 @@ public class MultimediaTest extends Activity implements android.media.MediaPlaye
 	private MediaPlayer mp;
 	private String failure;
 	private long timestamp;
+	private long cpuTimestamp;
 	private int expectedDuration;
 	private final Test[] tests = {
 		// Audio Codecs
@@ -112,6 +115,7 @@ public class MultimediaTest extends Activity implements android.media.MediaPlaye
 		else
 			Log.i(TAG, "FAIL:" + tests[currentTest].name + ":sanityCheck:Test and Player disagree about whether or not the content has a video part");
 		timestamp = System.currentTimeMillis();
+		cpuTimestamp = cpuTime();
 		expectedDuration = mp.getDuration();
 		if(expectedDuration <= 0)
 			Log.i(TAG, "WARN:" + tests[currentTest].name + ":Couldn't determine duration");
@@ -121,6 +125,7 @@ public class MultimediaTest extends Activity implements android.media.MediaPlaye
 	@Override
 	public void onCompletion(MediaPlayer mp) {
 		long elapsedTime = System.currentTimeMillis() - timestamp;
+		long elapsedCpuTime = cpuTime() - cpuTimestamp;
 		if(failure.length() == 0) {
 			if(expectedDuration >= 0 && Math.abs(elapsedTime - expectedDuration) > 10000) {
 				Log.i(TAG, "WARN:" + tests[currentTest].name + ":Actual playing time (" + Long.toString(elapsedTime) + "ms) differs significantly from expected time (" + Integer.toString(expectedDuration) + "ms)");
@@ -128,6 +133,11 @@ public class MultimediaTest extends Activity implements android.media.MediaPlaye
 			Log.i(TAG, "PASS:" + tests[currentTest].name + ":playback");
 		} else
 			Log.i(TAG, "FAIL:" + tests[currentTest].name + ":playback:" + failure);
+		// FIXME we should find a reasonable threshold to make
+		// an educated guess on whether or not a codec is hardware
+		// accelerated.
+		// Will require some testing on different hardware...
+		Log.i(TAG, "PERF:" + tests[currentTest].name + Long.toString(elapsedCpuTime) + " jiffies used");
 		runNextTest();
 	}
 
@@ -142,4 +152,23 @@ public class MultimediaTest extends Activity implements android.media.MediaPlaye
 		Log.i(TAG, "NOTE:" + tests[currentTest].name + ":playback:MediaPlayer sent info " + Integer.toString(what) + "/" + Integer.toString(extra));
 		return true;
 	}
+
+	public long cpuTime() {
+		long usedTime = 0;
+		try {
+			RandomAccessFile reader = new RandomAccessFile("/proc/" + Integer.toString(Process.myPid()) + "/stat", "r");
+			String[] toks=reader.readLine().split(" ");
+			// 13: jiffies in user mode
+			// 14: jiffies in kernel mode
+			// 15: jiffies in user mode of child processes (maybe some codecs launch an external decoder...)
+			// 16: jiffies in kernel mode of child processes
+			usedTime = Long.parseLong(toks[13]) + Long.parseLong(toks[14]) + Long.parseLong(toks[15]) + Long.parseLong(toks[16]);
+			reader.close();
+		} catch(java.io.FileNotFoundException e) {
+			Log.e(TAG, "ERR:/proc not mounted?");
+		} catch(java.io.IOException e) {
+			Log.e(TAG, "ERR:I/O error while reading CPU load");
+		}
+		return usedTime;
+	}
 }