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Chapter 3 performance platform godeye source code analysis - memory module
2022-07-19 04:05:00 【Handsome Xu】
3. Memory module
3.1 Heap
Heap It refers to the heap memory information of the monitoring application , It is mainly provided through the system Api obtain , Simple to use
Source code analysis
1、 start-up Heap Monitoring of
Heap By starting the timer , Press xml Configure the time to collect , adopt MemoryUtil.getAppHeapInfo() Get heap memory information
public class HeapEngine implements Engine {
private Producer<HeapInfo> mProducer;
private long mIntervalMillis;
private CompositeDisposable mCompositeDisposable;
HeapEngine(Producer<HeapInfo> producer, long intervalMillis) {
mProducer = producer;
mIntervalMillis = intervalMillis;
mCompositeDisposable = new CompositeDisposable();
}
@Override
public void work() {
mCompositeDisposable.add(Observable.interval(mIntervalMillis, TimeUnit.MILLISECONDS).map(new Function<Long, HeapInfo>() {
@Override
public HeapInfo apply(Long aLong) throws Exception {
ThreadUtil.ensureWorkThread("HeapEngine apply");
return MemoryUtil.getAppHeapInfo();
}
}).subscribeOn(ThreadUtil.computationScheduler())
.observeOn(ThreadUtil.computationScheduler())
.subscribe(new Consumer<HeapInfo>() {
@Override
public void accept(HeapInfo food) throws Exception {
ThreadUtil.ensureWorkThread("HeapEngine accept");
mProducer.produce(food);
}
}));
}
}
2、 collection Heap Information
To obtain parameters
- freeMemKb： Allocable memory
- maxMemKb： Maximum memory
- allocatedKb： Memory allocated
public static HeapInfo getAppHeapInfo() {
Runtime runtime = Runtime.getRuntime();
HeapInfo heapInfo = new HeapInfo();
heapInfo.freeMemKb = runtime.freeMemory() / 1024;
heapInfo.maxMemKb = Runtime.getRuntime().maxMemory() / 1024;
heapInfo.allocatedKb = (Runtime.getRuntime().totalMemory() - runtime.freeMemory()) / 1024;
return heapInfo;
}
3、 summary
Heap memory acquisition is relatively simple , Provided by the system Api Subject to
3.2 Pss
PSS It refers to the physical memory of the monitoring application ,PSS = The process actually uses physical memory (USS) + Allocate the memory occupied by the shared library in proportion , It was first recommended by the government PSS A graph to measure App Physical memory usage , and Android 4.4 After that USS. however PSS, There's a big problem , Namely ” Shared memory “, Consider a situation , If A Process and B All processes use a share so library , that so The memory used for initialization in the library will be divided equally into A And B The head of the . however A Is in B After that , So for B Of PSS In terms of curve , stay A The moment it started , Even if B Not doing anything , There will also be a relatively large step-by-step decline
Source code analysis
1、 start-up PSS Monitoring of
PSS By starting the timer , Press xml Configure the time to collect , adopt MemoryUtil.getAppPssInfo() obtain PSS Information
public class PssEngine implements Engine {
private Context mContext;
private Producer<PssInfo> mProducer;
private long mIntervalMillis;
private CompositeDisposable mCompositeDisposable;
PssEngine(Context context, Producer<PssInfo> producer, long intervalMillis) {
mContext = context;
mProducer = producer;
mIntervalMillis = intervalMillis;
mCompositeDisposable = new CompositeDisposable();
}
@Override
public void work() {
mCompositeDisposable.add(Observable.interval(mIntervalMillis, TimeUnit.MILLISECONDS).map(aLong -> {
ThreadUtil.ensureWorkThread("PssEngine accept");
return MemoryUtil.getAppPssInfo(mContext);
}).subscribeOn(ThreadUtil.computationScheduler())
.observeOn(ThreadUtil.computationScheduler())
.subscribe(food -> {
ThreadUtil.ensureWorkThread("PssEngine accept");
mProducer.produce(food);
}));
}
}
2、 collection PSS Information
To obtain parameters
- totalPssKb： Of the current process PSS
- dalvikPssKb：dalvik virtual machine (java layer ) Of PSS
- nativePssKb：native Layer of PSS
- otherPssKb：native and dalvik Outside part PSS
public static PssInfo getAppPssInfo(Context context) {
final int pid = ProcessUtils.getCurrentPid();
if (sActivityManager == null) {
sActivityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
}
Debug.MemoryInfo memoryInfo = sActivityManager.getProcessMemoryInfo(new int[]{
pid})[0];
PssInfo pssInfo = new PssInfo();
pssInfo.totalPssKb = memoryInfo.getTotalPss();
pssInfo.dalvikPssKb = memoryInfo.dalvikPss;
pssInfo.nativePssKb = memoryInfo.nativePss;
pssInfo.otherPssKb = memoryInfo.otherPss;
return pssInfo;
}
public static int getCurrentPid() {
return android.os.Process.myPid();
}
3、 summary
PSS The acquisition of is relatively simple , Provided by the system Api Subject to , But it is difficult to come into use in practical application
3.3 Ram
RAM For the running memory of the current mobile device , such as ,360 Floating window of mobile assistant , The running memory often prompted exceeds 80% And so on , It is mainly provided through the system Api obtain , Simple to use
Source code analysis
1、 start-up Ram Monitoring of
Ram By starting the timer , Press xml Configure the time to collect , adopt MemoryUtil.getRamInfo(mContext) obtain Ram Information
public class RamEngine implements Engine {
private Context mContext;
private Producer<RamInfo> mProducer;
private long mIntervalMillis;
private CompositeDisposable mCompositeDisposable;
RamEngine(Context context, Producer<RamInfo> producer, long intervalMillis) {
mContext = context;
mProducer = producer;
mIntervalMillis = intervalMillis;
mCompositeDisposable = new CompositeDisposable();
}
@Override
public void work() {
mCompositeDisposable.add(Observable.interval(mIntervalMillis, TimeUnit.MILLISECONDS).map(new Function<Long, RamInfo>() {
@Override
public RamInfo apply(Long aLong) throws Exception {
ThreadUtil.ensureWorkThread("RamEngine apply");
return MemoryUtil.getRamInfo(mContext);
}
})
.subscribeOn(ThreadUtil.computationScheduler())
.observeOn(ThreadUtil.computationScheduler())
.subscribe(new Consumer<RamInfo>() {
@Override
public void accept(RamInfo food) throws Exception {
ThreadUtil.ensureWorkThread("RamEngine accept");
mProducer.produce(food);
}
}));
}
}
2、 collection Ram Information
To obtain parameters
- availMemKb： You can use RAM
- totalMemKb： Mobile phone total RAM
- lowMemThresholdKb： The threshold of full memory , If it exceeds, it is considered as a low memory running state , May be Kill process
- isLowMemory： Whether the low memory state is running
public static RamInfo getRamInfo(Context context) {
if (sActivityManager == null) {
sActivityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
}
final ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();
sActivityManager.getMemoryInfo(mi);
final RamInfo ramMemoryInfo = new RamInfo();
ramMemoryInfo.availMemKb = mi.availMem / 1024;
ramMemoryInfo.isLowMemory = mi.lowMemory;
ramMemoryInfo.lowMemThresholdKb = mi.threshold / 1024;
ramMemoryInfo.totalMemKb = getRamTotalMem(sActivityManager);
return ramMemoryInfo;
}
/** * Get the total of the system synchronously ram size * * @param activityManager * @return */
private static long getRamTotalMem(ActivityManager activityManager) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();
activityManager.getMemoryInfo(mi);
return mi.totalMem / 1024;
} else if (sTotalMem.get() > 0L) {
// If the value has been obtained from the file , You don't need to get it again
return sTotalMem.get();
} else {
final long tm = getRamTotalMemByFile();
sTotalMem.set(tm);
return tm;
}
}
/** * Get a cell phone RAM Capacity , Actually sum activityManager.getMemoryInfo(mi).totalMem The effect is the same , in other words , stay API16 The above uses the system API obtain , The lower version adopts this file reading method * * @return Capacity KB */
private static long getRamTotalMemByFile() {
final String dir = "/proc/meminfo";
try {
FileReader fr = new FileReader(dir);
BufferedReader br = new BufferedReader(fr, 2048);
String memoryLine = br.readLine();
String subMemoryLine = memoryLine.substring(memoryLine
.indexOf("MemTotal:"));
br.close();
return (long) Integer.parseInt(subMemoryLine.replaceAll(
"\\D+", ""));
} catch (IOException e) {
e.printStackTrace();
}
return 0L;
}
3、 summary
at present Ram It's easy to get , Through the system APi obtain
3.4 AppSize
AppSize It refers to getting the total size of the application , obtain AppSize Need authority
<uses-permission android:name="android.permission.GET_PACKAGE_SIZE"></uses-permission>
Source code analysis
1、 start-up AppSize Monitoring of
AppSize By starting the timer , Press xml Configure the time to collect , adopt AppSizeUtil.getAppSize() obtain AppSize Information
public class AppSize extends ProduceableSubject<AppSizeInfo> implements Install<AppSizeConfig> {
private Disposable disposable;
private boolean mInstalled = false;
private AppSizeConfig mConfig;
@Override
public synchronized boolean install(AppSizeConfig config) {
if (mInstalled) {
L.d("AppSize already installed, ignore.");
return true;
}
mInstalled = true;
mConfig = config;
disposable = ThreadUtil.computationScheduler().scheduleDirect(() -> AppSizeUtil.getAppSize(GodEye.instance().getApplication(), new AppSizeUtil.OnGetSizeListener() {
@Override
public void onGetSize(AppSizeInfo appSizeInfo) {
L.d("AppSize onGetSize: cache size: %s, data size: %s, codeSize: %s", AppSizeUtil.formatSize(appSizeInfo.cacheSize),
AppSizeUtil.formatSize(appSizeInfo.dataSize), AppSizeUtil.formatSize(appSizeInfo.codeSize));
produce(appSizeInfo);
}
@Override
public void onError(Throwable t) {
L.d("AppSize onGetError: %s", String.valueOf(t));
produce(AppSizeInfo.INVALID);
}
}), config.delayMillis(), TimeUnit.MILLISECONDS);
L.d("AppSize installed.");
return true;
}
}
2、 collection AppSize Information
AppSize Get by version
static void getAppSize(Context context, OnGetSizeListener listener) {
if (listener == null) {
return;
}
try {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
getAppSizeAboveO(context, listener);
} else {
getAppSizeLowerO(context, listener);
}
} catch (Exception e) {
listener.onError(e);
}
}
stay AndroidO The above is through system services StorageManager Find the corresponding application to get
/** * Get the size of the application */
@RequiresApi(api = Build.VERSION_CODES.O)
private static void getAppSizeAboveO(Context context, @NonNull OnGetSizeListener listener) {
StorageStatsManager storageStatsManager = (StorageStatsManager) context
.getSystemService(Context.STORAGE_STATS_SERVICE);
StorageManager storageManager = (StorageManager) context.getSystemService(Context.STORAGE_SERVICE);
// Get all apps StorageVolume list
List<StorageVolume> storageVolumes = storageManager.getStorageVolumes();
for (StorageVolume item : storageVolumes) {
String uuidStr = item.getUuid();
UUID uuid;
if (uuidStr == null) {
uuid = StorageManager.UUID_DEFAULT;
} else {
uuid = UUID.fromString(uuidStr);
}
int uid = getUid(context, context.getPackageName());
// Get by package name uid
StorageStats storageStats;
try {
storageStats = storageStatsManager.queryStatsForUid(uuid, uid);
AppSizeInfo ctAppSizeInfo = new AppSizeInfo();
ctAppSizeInfo.cacheSize = storageStats.getCacheBytes();
ctAppSizeInfo.dataSize = storageStats.getDataBytes();
ctAppSizeInfo.codeSize = storageStats.getAppBytes();
listener.onGetSize(ctAppSizeInfo);
} catch (IOException e) {
listener.onError(e);
}
}
}
/** * Get the corresponding according to the application package name uid */
private static int getUid(Context context, String pakName) {
try {
return context.getPackageManager().getApplicationInfo(pakName, PackageManager.GET_META_DATA).uid;
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
return -1;
}
stay AndroidO following , adopt aidl Way to call getPackageSizeInfo To get the size , among IPackageStatsObserver Because the parameter requires aidl The interface of , We created IPackageStatsObserver.aidl File to aidl Under the table of contents
// IPackageStatsObserver.aidl
package android.content.pm;
// The package name must be android.content.pm
import android.content.pm.PackageStats;
interface IPackageStatsObserver {
oneway void onGetStatsCompleted(in PackageStats pStats, boolean succeeded);
}
Get the current application size in the form of reflection
/** * Get app size 8.0 following */
@SuppressWarnings("JavaReflectionMemberAccess")
private static void getAppSizeLowerO(Context context, @NonNull final OnGetSizeListener listener) {
try {
Method method = PackageManager.class.getMethod("getPackageSizeInfo", String.class,
IPackageStatsObserver.class);
// call getPackageSizeInfo Method , Two parameters are required ：1、 Name of application package to be detected ;2、 Callback
method.invoke(context.getPackageManager(), context.getPackageName(), new IPackageStatsObserver.Stub() {
@Override
public void onGetStatsCompleted(PackageStats pStats, boolean succeeded) {
AppSizeInfo ctAppSizeInfo = new AppSizeInfo();
ctAppSizeInfo.cacheSize = pStats.cacheSize;
ctAppSizeInfo.dataSize = pStats.dataSize;
ctAppSizeInfo.codeSize = pStats.codeSize;
listener.onGetSize(ctAppSizeInfo);
}
});
} catch (Throwable e) {
listener.onError(e);
}
}
To obtain parameters
- cacheSize： The cache size of the application , such as
/data/data/<app>/cache - dataSize： Size of application internal data , such as
/data/data/<app> - codeSize： Size of application code , namely APK Size
3、 summary
AppSize The acquisition of needs to be compatible with the acquisition methods of various versions , It will be a little more troublesome to obtain , In terms of performance index , Application size is also a point
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