/*
* Copyright (C) 2009 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 android.os;
import java.util.ArrayList;
/**
* Collects performance data between two function calls in Bundle objects and
* outputs the results using writer of type {@link PerformanceResultsWriter}.
* <p>
* {@link #beginSnapshot(String)} and {@link #endSnapshot()} functions collect
* memory usage information and measure runtime between calls to begin and end.
* These functions logically wrap around an entire test, and should be called
* with name of test as the label, e.g. EmailPerformanceTest.
* <p>
* {@link #startTiming(String)} and {@link #stopTiming(String)} functions
* measure runtime between calls to start and stop. These functions logically
* wrap around a single test case or a small block of code, and should be called
* with the name of test case as the label, e.g. testSimpleSendMailSequence.
* <p>
* {@link #addIteration(String)} inserts intermediate measurement point which
* can be labeled with a String, e.g. Launch email app, compose, send, etc.
* <p>
* Snapshot and timing functions do not interfere with each other, and thus can
* be called in any order. The intended structure is to wrap begin/endSnapshot
* around calls to start/stopTiming, for example:
* <p>
* <code>beginSnapshot("EmailPerformanceTest");
* startTiming("testSimpleSendSequence");
* addIteration("Launch email app");
* addIteration("Compose");
* stopTiming("Send");
* startTiming("testComplexSendSequence");
* stopTiming("");
* startTiming("testAddLabel");
* stopTiming("");
* endSnapshot();</code>
* <p>
* Structure of results output is up to implementor of
* {@link PerformanceResultsWriter }.
*
* {@hide} Pending approval for public API.
*/
public class PerformanceCollector {
/**
* Interface for reporting performance data.
*/
public interface PerformanceResultsWriter {
/**
* Callback invoked as first action in
* PerformanceCollector#beginSnapshot(String) for reporting the start of
* a performance snapshot.
*
* @param label description of code block between beginSnapshot and
* PerformanceCollector#endSnapshot()
* @see PerformanceCollector#beginSnapshot(String)
*/
public void writeBeginSnapshot(String label);
/**
* Callback invoked as last action in PerformanceCollector#endSnapshot()
* for reporting performance data collected in the snapshot.
*
* @param results memory and runtime metrics stored as key/value pairs,
* in the same structure as returned by
* PerformanceCollector#endSnapshot()
* @see PerformanceCollector#endSnapshot()
*/
public void writeEndSnapshot(Bundle results);
/**
* Callback invoked as first action in
* PerformanceCollector#startTiming(String) for reporting the start of
* a timing measurement.
*
* @param label description of code block between startTiming and
* PerformanceCollector#stopTiming(String)
* @see PerformanceCollector#startTiming(String)
*/
public void writeStartTiming(String label);
/**
* Callback invoked as last action in
* {@link PerformanceCollector#stopTiming(String)} for reporting the
* sequence of timings measured.
*
* @param results runtime metrics of code block between calls to
* startTiming and stopTiming, in the same structure as
* returned by PerformanceCollector#stopTiming(String)
* @see PerformanceCollector#stopTiming(String)
*/
public void writeStopTiming(Bundle results);
/**
* Callback invoked as last action in
* {@link PerformanceCollector#addMeasurement(String, long)} for
* reporting an integer type measurement.
*
* @param label short description of the metric that was measured
* @param value long value of the measurement
*/
public void writeMeasurement(String label, long value);
/**
* Callback invoked as last action in
* {@link PerformanceCollector#addMeasurement(String, float)} for
* reporting a float type measurement.
*
* @param label short description of the metric that was measured
* @param value float value of the measurement
*/
public void writeMeasurement(String label, float value);
/**
* Callback invoked as last action in
* {@link PerformanceCollector#addMeasurement(String, String)} for
* reporting a string field.
*
* @param label short description of the metric that was measured
* @param value string summary of the measurement
*/
public void writeMeasurement(String label, String value);
}
/**
* In a results Bundle, this key references a List of iteration Bundles.
*/
public static final String METRIC_KEY_ITERATIONS = "iterations";
/**
* In an iteration Bundle, this key describes the iteration.
*/
public static final String METRIC_KEY_LABEL = "label";
/**
* In a results Bundle, this key reports the cpu time of the code block
* under measurement.
*/
public static final String METRIC_KEY_CPU_TIME = "cpu_time";
/**
* In a results Bundle, this key reports the execution time of the code
* block under measurement.
*/
public static final String METRIC_KEY_EXECUTION_TIME = "execution_time";
/**
* In a snapshot Bundle, this key reports the number of received
* transactions from the binder driver before collection started.
*/
public static final String METRIC_KEY_PRE_RECEIVED_TRANSACTIONS = "pre_received_transactions";
/**
* In a snapshot Bundle, this key reports the number of transactions sent by
* the running program before collection started.
*/
public static final String METRIC_KEY_PRE_SENT_TRANSACTIONS = "pre_sent_transactions";
/**
* In a snapshot Bundle, this key reports the number of received
* transactions from the binder driver.
*/
public static final String METRIC_KEY_RECEIVED_TRANSACTIONS = "received_transactions";
/**
* In a snapshot Bundle, this key reports the number of transactions sent by
* the running program.
*/
public static final String METRIC_KEY_SENT_TRANSACTIONS = "sent_transactions";
/**
* In a snapshot Bundle, this key reports the number of garbage collection
* invocations.
*/
public static final String METRIC_KEY_GC_INVOCATION_COUNT = "gc_invocation_count";
/**
* In a snapshot Bundle, this key reports the amount of allocated memory
* used by the running program.
*/
public static final String METRIC_KEY_JAVA_ALLOCATED = "java_allocated";
/**
* In a snapshot Bundle, this key reports the amount of free memory
* available to the running program.
*/
public static final String METRIC_KEY_JAVA_FREE = "java_free";
/**
* In a snapshot Bundle, this key reports the number of private dirty pages
* used by dalvik.
*/
public static final String METRIC_KEY_JAVA_PRIVATE_DIRTY = "java_private_dirty";
/**
* In a snapshot Bundle, this key reports the proportional set size for
* dalvik.
*/
public static final String METRIC_KEY_JAVA_PSS = "java_pss";
/**
* In a snapshot Bundle, this key reports the number of shared dirty pages
* used by dalvik.
*/
public static final String METRIC_KEY_JAVA_SHARED_DIRTY = "java_shared_dirty";
/**
* In a snapshot Bundle, this key reports the total amount of memory
* available to the running program.
*/
public static final String METRIC_KEY_JAVA_SIZE = "java_size";
/**
* In a snapshot Bundle, this key reports the amount of allocated memory in
* the native heap.
*/
public static final String METRIC_KEY_NATIVE_ALLOCATED = "native_allocated";
/**
* In a snapshot Bundle, this key reports the amount of free memory in the
* native heap.
*/
public static final String METRIC_KEY_NATIVE_FREE = "native_free";
/**
* In a snapshot Bundle, this key reports the number of private dirty pages
* used by the native heap.
*/
public static final String METRIC_KEY_NATIVE_PRIVATE_DIRTY = "native_private_dirty";
/**
* In a snapshot Bundle, this key reports the proportional set size for the
* native heap.
*/
public static final String METRIC_KEY_NATIVE_PSS = "native_pss";
/**
* In a snapshot Bundle, this key reports the number of shared dirty pages
* used by the native heap.
*/
public static final String METRIC_KEY_NATIVE_SHARED_DIRTY = "native_shared_dirty";
/**
* In a snapshot Bundle, this key reports the size of the native heap.
*/
public static final String METRIC_KEY_NATIVE_SIZE = "native_size";
/**
* In a snapshot Bundle, this key reports the number of objects allocated
* globally.
*/
public static final String METRIC_KEY_GLOBAL_ALLOC_COUNT = "global_alloc_count";
/**
* In a snapshot Bundle, this key reports the size of all objects allocated
* globally.
*/
public static final String METRIC_KEY_GLOBAL_ALLOC_SIZE = "global_alloc_size";
/**
* In a snapshot Bundle, this key reports the number of objects freed
* globally.
*/
public static final String METRIC_KEY_GLOBAL_FREED_COUNT = "global_freed_count";
/**
* In a snapshot Bundle, this key reports the size of all objects freed
* globally.
*/
public static final String METRIC_KEY_GLOBAL_FREED_SIZE = "global_freed_size";
/**
* In a snapshot Bundle, this key reports the number of private dirty pages
* used by everything else.
*/
public static final String METRIC_KEY_OTHER_PRIVATE_DIRTY = "other_private_dirty";
/**
* In a snapshot Bundle, this key reports the proportional set size for
* everything else.
*/
public static final String METRIC_KEY_OTHER_PSS = "other_pss";
/**
* In a snapshot Bundle, this key reports the number of shared dirty pages
* used by everything else.
*/
public static final String METRIC_KEY_OTHER_SHARED_DIRTY = "other_shared_dirty";
private PerformanceResultsWriter mPerfWriter;
private Bundle mPerfSnapshot;
private Bundle mPerfMeasurement;
private long mSnapshotCpuTime;
private long mSnapshotExecTime;
private long mCpuTime;
private long mExecTime;
public PerformanceCollector() {
}
public PerformanceCollector(PerformanceResultsWriter writer) {
setPerformanceResultsWriter(writer);
}
public void setPerformanceResultsWriter(PerformanceResultsWriter writer) {
mPerfWriter = writer;
}
/**
* Begin collection of memory usage information.
*
* @param label description of code block between beginSnapshot and
* endSnapshot, used to label output
*/
public void beginSnapshot(String label) {
if (mPerfWriter != null)
mPerfWriter.writeBeginSnapshot(label);
startPerformanceSnapshot();
}
/**
* End collection of memory usage information. Returns collected data in a
* Bundle object.
*
* @return Memory and runtime metrics stored as key/value pairs. Values are
* of type long, and keys include:
* <ul>
* <li>{@link #METRIC_KEY_CPU_TIME cpu_time}
* <li>{@link #METRIC_KEY_EXECUTION_TIME execution_time}
* <li>{@link #METRIC_KEY_PRE_RECEIVED_TRANSACTIONS
* pre_received_transactions}
* <li>{@link #METRIC_KEY_PRE_SENT_TRANSACTIONS
* pre_sent_transactions}
* <li>{@link #METRIC_KEY_RECEIVED_TRANSACTIONS
* received_transactions}
* <li>{@link #METRIC_KEY_SENT_TRANSACTIONS sent_transactions}
* <li>{@link #METRIC_KEY_GC_INVOCATION_COUNT gc_invocation_count}
* <li>{@link #METRIC_KEY_JAVA_ALLOCATED java_allocated}
* <li>{@link #METRIC_KEY_JAVA_FREE java_free}
* <li>{@link #METRIC_KEY_JAVA_PRIVATE_DIRTY java_private_dirty}
* <li>{@link #METRIC_KEY_JAVA_PSS java_pss}
* <li>{@link #METRIC_KEY_JAVA_SHARED_DIRTY java_shared_dirty}
* <li>{@link #METRIC_KEY_JAVA_SIZE java_size}
* <li>{@link #METRIC_KEY_NATIVE_ALLOCATED native_allocated}
* <li>{@link #METRIC_KEY_NATIVE_FREE native_free}
* <li>{@link #METRIC_KEY_NATIVE_PRIVATE_DIRTY native_private_dirty}
* <li>{@link #METRIC_KEY_NATIVE_PSS native_pss}
* <li>{@link #METRIC_KEY_NATIVE_SHARED_DIRTY native_shared_dirty}
* <li>{@link #METRIC_KEY_NATIVE_SIZE native_size}
* <li>{@link #METRIC_KEY_GLOBAL_ALLOC_COUNT global_alloc_count}
* <li>{@link #METRIC_KEY_GLOBAL_ALLOC_SIZE global_alloc_size}
* <li>{@link #METRIC_KEY_GLOBAL_FREED_COUNT global_freed_count}
* <li>{@link #METRIC_KEY_GLOBAL_FREED_SIZE global_freed_size}
* <li>{@link #METRIC_KEY_OTHER_PRIVATE_DIRTY other_private_dirty}
* <li>{@link #METRIC_KEY_OTHER_PSS other_pss}
* <li>{@link #METRIC_KEY_OTHER_SHARED_DIRTY other_shared_dirty}
* </ul>
*/
public Bundle endSnapshot() {
endPerformanceSnapshot();
if (mPerfWriter != null)
mPerfWriter.writeEndSnapshot(mPerfSnapshot);
return mPerfSnapshot;
}
/**
* Start measurement of user and cpu time.
*
* @param label description of code block between startTiming and
* stopTiming, used to label output
*/
public void startTiming(String label) {
if (mPerfWriter != null)
mPerfWriter.writeStartTiming(label);
mPerfMeasurement = new Bundle();
mPerfMeasurement.putParcelableArrayList(
METRIC_KEY_ITERATIONS, new ArrayList<Parcelable>());
mExecTime = SystemClock.uptimeMillis();
mCpuTime = Process.getElapsedCpuTime();
}
/**
* Add a measured segment, and start measuring the next segment. Returns
* collected data in a Bundle object.
*
* @param label description of code block between startTiming and
* addIteration, and between two calls to addIteration, used
* to label output
* @return Runtime metrics stored as key/value pairs. Values are of type
* long, and keys include:
* <ul>
* <li>{@link #METRIC_KEY_LABEL label}
* <li>{@link #METRIC_KEY_CPU_TIME cpu_time}
* <li>{@link #METRIC_KEY_EXECUTION_TIME execution_time}
* </ul>
*/
public Bundle addIteration(String label) {
mCpuTime = Process.getElapsedCpuTime() - mCpuTime;
mExecTime = SystemClock.uptimeMillis() - mExecTime;
Bundle iteration = new Bundle();
iteration.putString(METRIC_KEY_LABEL, label);
iteration.putLong(METRIC_KEY_EXECUTION_TIME, mExecTime);
iteration.putLong(METRIC_KEY_CPU_TIME, mCpuTime);
mPerfMeasurement.getParcelableArrayList(METRIC_KEY_ITERATIONS).add(iteration);
mExecTime = SystemClock.uptimeMillis();
mCpuTime = Process.getElapsedCpuTime();
return iteration;
}
/**
* Stop measurement of user and cpu time.
*
* @param label description of code block between addIteration or
* startTiming and stopTiming, used to label output
* @return Runtime metrics stored in a bundle, including all iterations
* between calls to startTiming and stopTiming. List of iterations
* is keyed by {@link #METRIC_KEY_ITERATIONS iterations}.
*/
public Bundle stopTiming(String label) {
addIteration(label);
if (mPerfWriter != null)
mPerfWriter.writeStopTiming(mPerfMeasurement);
return mPerfMeasurement;
}
/**
* Add an integer type measurement to the collector.
*
* @param label short description of the metric that was measured
* @param value long value of the measurement
*/
public void addMeasurement(String label, long value) {
if (mPerfWriter != null)
mPerfWriter.writeMeasurement(label, value);
}
/**
* Add a float type measurement to the collector.
*
* @param label short description of the metric that was measured
* @param value float value of the measurement
*/
public void addMeasurement(String label, float value) {
if (mPerfWriter != null)
mPerfWriter.writeMeasurement(label, value);
}
/**
* Add a string field to the collector.
*
* @param label short description of the metric that was measured
* @param value string summary of the measurement
*/
public void addMeasurement(String label, String value) {
if (mPerfWriter != null)
mPerfWriter.writeMeasurement(label, value);
}
/*
* Starts tracking memory usage, binder transactions, and real & cpu timing.
*/
private void startPerformanceSnapshot() {
// Create new snapshot
mPerfSnapshot = new Bundle();
// Add initial binder counts
Bundle binderCounts = getBinderCounts();
for (String key : binderCounts.keySet()) {
mPerfSnapshot.putLong("pre_" + key, binderCounts.getLong(key));
}
// Force a GC and zero out the performance counters. Do this
// before reading initial CPU/wall-clock times so we don't include
// the cost of this setup in our final metrics.
startAllocCounting();
// Record CPU time up to this point, and start timing. Note: this
// must happen at the end of this method, otherwise the timing will
// include noise.
mSnapshotExecTime = SystemClock.uptimeMillis();
mSnapshotCpuTime = Process.getElapsedCpuTime();
}
/*
* Stops tracking memory usage, binder transactions, and real & cpu timing.
* Stores collected data as type long into Bundle object for reporting.
*/
private void endPerformanceSnapshot() {
// Stop the timing. This must be done first before any other counting is
// stopped.
mSnapshotCpuTime = Process.getElapsedCpuTime() - mSnapshotCpuTime;
mSnapshotExecTime = SystemClock.uptimeMillis() - mSnapshotExecTime;
stopAllocCounting();
long nativeMax = Debug.getNativeHeapSize() / 1024;
long nativeAllocated = Debug.getNativeHeapAllocatedSize() / 1024;
long nativeFree = Debug.getNativeHeapFreeSize() / 1024;
Debug.MemoryInfo memInfo = new Debug.MemoryInfo();
Debug.getMemoryInfo(memInfo);
Runtime runtime = Runtime.getRuntime();
long dalvikMax = runtime.totalMemory() / 1024;
long dalvikFree = runtime.freeMemory() / 1024;
long dalvikAllocated = dalvikMax - dalvikFree;
// Add final binder counts
Bundle binderCounts = getBinderCounts();
for (String key : binderCounts.keySet()) {
mPerfSnapshot.putLong(key, binderCounts.getLong(key));
}
// Add alloc counts
Bundle allocCounts = getAllocCounts();
for (String key : allocCounts.keySet()) {
mPerfSnapshot.putLong(key, allocCounts.getLong(key));
}
mPerfSnapshot.putLong(METRIC_KEY_EXECUTION_TIME, mSnapshotExecTime);
mPerfSnapshot.putLong(METRIC_KEY_CPU_TIME, mSnapshotCpuTime);
mPerfSnapshot.putLong(METRIC_KEY_NATIVE_SIZE, nativeMax);
mPerfSnapshot.putLong(METRIC_KEY_NATIVE_ALLOCATED, nativeAllocated);
mPerfSnapshot.putLong(METRIC_KEY_NATIVE_FREE, nativeFree);
mPerfSnapshot.putLong(METRIC_KEY_NATIVE_PSS, memInfo.nativePss);
mPerfSnapshot.putLong(METRIC_KEY_NATIVE_PRIVATE_DIRTY, memInfo.nativePrivateDirty);
mPerfSnapshot.putLong(METRIC_KEY_NATIVE_SHARED_DIRTY, memInfo.nativeSharedDirty);
mPerfSnapshot.putLong(METRIC_KEY_JAVA_SIZE, dalvikMax);
mPerfSnapshot.putLong(METRIC_KEY_JAVA_ALLOCATED, dalvikAllocated);
mPerfSnapshot.putLong(METRIC_KEY_JAVA_FREE, dalvikFree);
mPerfSnapshot.putLong(METRIC_KEY_JAVA_PSS, memInfo.dalvikPss);
mPerfSnapshot.putLong(METRIC_KEY_JAVA_PRIVATE_DIRTY, memInfo.dalvikPrivateDirty);
mPerfSnapshot.putLong(METRIC_KEY_JAVA_SHARED_DIRTY, memInfo.dalvikSharedDirty);
mPerfSnapshot.putLong(METRIC_KEY_OTHER_PSS, memInfo.otherPss);
mPerfSnapshot.putLong(METRIC_KEY_OTHER_PRIVATE_DIRTY, memInfo.otherPrivateDirty);
mPerfSnapshot.putLong(METRIC_KEY_OTHER_SHARED_DIRTY, memInfo.otherSharedDirty);
}
/*
* Starts allocation counting. This triggers a gc and resets the counts.
*/
private static void startAllocCounting() {
// Before we start trigger a GC and reset the debug counts. Run the
// finalizers and another GC before starting and stopping the alloc
// counts. This will free up any objects that were just sitting around
// waiting for their finalizers to be run.
Runtime.getRuntime().gc();
Runtime.getRuntime().runFinalization();
Runtime.getRuntime().gc();
Debug.resetAllCounts();
// start the counts
Debug.startAllocCounting();
}
/*
* Stops allocation counting.
*/
private static void stopAllocCounting() {
Runtime.getRuntime().gc();
Runtime.getRuntime().runFinalization();
Runtime.getRuntime().gc();
Debug.stopAllocCounting();
}
/*
* Returns a bundle with the current results from the allocation counting.
*/
private static Bundle getAllocCounts() {
Bundle results = new Bundle();
results.putLong(METRIC_KEY_GLOBAL_ALLOC_COUNT, Debug.getGlobalAllocCount());
results.putLong(METRIC_KEY_GLOBAL_ALLOC_SIZE, Debug.getGlobalAllocSize());
results.putLong(METRIC_KEY_GLOBAL_FREED_COUNT, Debug.getGlobalFreedCount());
results.putLong(METRIC_KEY_GLOBAL_FREED_SIZE, Debug.getGlobalFreedSize());
results.putLong(METRIC_KEY_GC_INVOCATION_COUNT, Debug.getGlobalGcInvocationCount());
return results;
}
/*
* Returns a bundle with the counts for various binder counts for this
* process. Currently the only two that are reported are the number of send
* and the number of received transactions.
*/
private static Bundle getBinderCounts() {
Bundle results = new Bundle();
results.putLong(METRIC_KEY_SENT_TRANSACTIONS, Debug.getBinderSentTransactions());
results.putLong(METRIC_KEY_RECEIVED_TRANSACTIONS, Debug.getBinderReceivedTransactions());
return results;
}
}
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