iOS 应用，性能监控
2017-07-15 本文已影响150人
02ec002ab1b2
github 源码地址
iOS 应用，性能监控
背景，目前正在优化项目，首先要对项目内的性能指标进行分析，这个可以通过Instrument 进行debug 分析。这样做只适用于开发人员。性能指标作为一项衡量App的重要指标无法量化。为了每次发布前能有一个性能报告，需要开发一个组件，对性能数据进行记录，之后通过脚本生成报表。
报表中重点关注的指标有以下几点：
- 启动时间
- 内存
- FPS（页面刷新帧率）
- CPU
- 页面渲染时间
debug模式
- 主线程阻塞时，输出MainThread 栈信息。
分别介绍如何实现这些数据的采集。
内存
vm_size_t usedMemory(void) {
struct task_basic_info info;
mach_msg_type_number_t size = sizeof(info);
kern_return_t kerr = task_info(mach_task_self(), TASK_BASIC_INFO, (task_info_t)&info, &size);
return (kerr == KERN_SUCCESS) ? info.resident_size : 0; // size in bytes
}
FPS
- 使用CADisplayLink 进行获取
_displayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(envokeDisplayLink:)];
[_displayLink addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSRunLoopCommonModes];
- (void)envokeDisplayLink:(CADisplayLink *)displayLink
{
if (_lastTime == 0) {
_lastTime = displayLink.timestamp;
return;
}
_count ++;
NSTimeInterval interval = displayLink.timestamp - _lastTime;
if (interval < 1) {
return;
}
_lastTime = displayLink.timestamp;
CGFloat fps = _count / interval;
_count = 0;
NSInteger shownFPS = round(fps);
CGFloat memory = [XYPerformanceUtility usedMemoryInMB];
CGFloat cpu = [XYPerformanceUtility cpuUsage];
DDLogInfo(@"FPS:%ld,MEM:%.2f,CPU:%.2f", (long)shownFPS, memory, cpu);
[self.performanceView setPerformanceViewData:cpu memory:memory FPS:shownFPS];
}
CPU
float cpu_usage()
{
kern_return_t kr;
task_info_data_t tinfo;
mach_msg_type_number_t task_info_count;
task_info_count = TASK_INFO_MAX;
kr = task_info(mach_task_self(), TASK_BASIC_INFO, (task_info_t)tinfo, &task_info_count);
if (kr != KERN_SUCCESS) {
return -1;
}
task_basic_info_t basic_info;
thread_array_t thread_list;
mach_msg_type_number_t thread_count;
thread_info_data_t thinfo;
mach_msg_type_number_t thread_info_count;
thread_basic_info_t basic_info_th;
uint32_t stat_thread = 0; // Mach threads
basic_info = (task_basic_info_t)tinfo;
// get threads in the task
kr = task_threads(mach_task_self(), &thread_list, &thread_count);
if (kr != KERN_SUCCESS) {
return -1;
}
if (thread_count > 0)
stat_thread += thread_count;
long tot_sec = 0;
long tot_usec = 0;
float tot_cpu = 0;
int j;
for (j = 0; j < thread_count; j++)
{
thread_info_count = THREAD_INFO_MAX;
kr = thread_info(thread_list[j], THREAD_BASIC_INFO,
(thread_info_t)thinfo, &thread_info_count);
if (kr != KERN_SUCCESS) {
return -1;
}
basic_info_th = (thread_basic_info_t)thinfo;
if (!(basic_info_th->flags & TH_FLAGS_IDLE)) {
tot_sec = tot_sec + basic_info_th->user_time.seconds + basic_info_th->system_time.seconds;
tot_usec = tot_usec + basic_info_th->user_time.microseconds + basic_info_th->system_time.microseconds;
tot_cpu = tot_cpu + basic_info_th->cpu_usage / (float)TH_USAGE_SCALE * 100.0;
}
} // for each thread
kr = vm_deallocate(mach_task_self(), (vm_offset_t)thread_list, thread_count * sizeof(thread_t));
assert(kr == KERN_SUCCESS);
return tot_cpu;
}
启动时间
+ (void)load
{
loadTime = mach_absolute_time();
mach_timebase_info(&timebaseInfo);
@autoreleasepool {
__block id obs;
obs = [[NSNotificationCenter defaultCenter] addObserverForName:UIApplicationDidFinishLaunchingNotification
object:nil queue:nil
usingBlock:^(NSNotification *note) {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
applicationRespondedTime = mach_absolute_time();
DDLogInfo(@"VivaVedio_IOS_Start_Time: %.f", MachTimeToSeconds(applicationRespondedTime - loadTime));
});
[[NSNotificationCenter defaultCenter] removeObserver:obs];
}];
}
}
页面渲染耗时
利用runtime， 将UIViewController 的viewWillAppear， viewDidAppear 进行hook。输出调用的时间间隔。
@interface UIViewController()
@property (nonatomic, assign) CFTimeInterval viewControllerAppearDuration;
@end
@implementation UIViewController (Performance)
+ (void)load{
[self walle_swizzlingViewWillAppear];
[self walle_swizzlingViewDidAppear];
}
+ (void)walle_swizzlingViewWillAppear
{
SEL originalSelector = @selector(viewWillAppear:);
SEL swizzledSelector = @selector(walle_viewWillAppear:);
[self swizzlingInClass:[self class] originalSelector:originalSelector swizzledSelector:swizzledSelector];
}
+ (void)walle_swizzlingViewDidAppear
{
SEL originalSelector = @selector(viewDidAppear:);
SEL swizzledSelector = @selector(walle_viewDidAppear:);
[self swizzlingInClass:[self class] originalSelector:originalSelector swizzledSelector:swizzledSelector];
}
- (void)walle_viewWillAppear:(BOOL)animated
{
self.viewControllerAppearDuration = CACurrentMediaTime();
[self walle_viewWillAppear:animated];
}
- (void)walle_viewDidAppear:(BOOL)animated
{
[self walle_viewDidAppear:animated];
self.viewControllerAppearDuration = CACurrentMediaTime() - self.viewControllerAppearDuration;
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSString *name = NSStringFromClass(self.class);
DDLogInfo(@"View Controller :%@ show time : %g s", name, self.viewControllerAppearDuration);
});
}
+ (void)swizzlingInClass:(Class)cls originalSelector:(SEL)originalSelector swizzledSelector:(SEL)swizzledSelector
{
Class clz = cls;
Method originalMethod = class_getInstanceMethod(clz, originalSelector);
Method swizzledMethod = class_getInstanceMethod(clz, swizzledSelector);
BOOL didAddMethod = class_addMethod(clz, originalSelector, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod));
if (didAddMethod) {
class_replaceMethod(clz, swizzledSelector, method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod));
}else{
method_exchangeImplementations(originalMethod, swizzledMethod);
}
}
- (void)setViewControllerAppearDuration:(CFTimeInterval)viewControllerAppearDuration
{
objc_setAssociatedObject(self, @selector(viewControllerAppearDuration), @(viewControllerAppearDuration), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (CFTimeInterval )viewControllerAppearDuration
{
return [objc_getAssociatedObject(self, @selector(viewControllerAppearDuration)) doubleValue];
}
debug 主线程阻塞
- 通过监控Runloop的回调进行监控
_observer = CFRunLoopObserverCreateWithHandler(kCFAllocatorDefault, kCFRunLoopAllActivities, true, 0, ^(CFRunLoopObserverRef observer, CFRunLoopActivity activity) {
self->_activity = activity;
dispatch_semaphore_t semaphore = self->_semaphore;
dispatch_semaphore_signal(semaphore);
});
CFRunLoopAddObserver(CFRunLoopGetMain(), _observer, kCFRunLoopCommonModes);
// 创建信号
_semaphore = dispatch_semaphore_create(0);
// 在子线程监控时长
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
while (YES)
{
// 超时250ms 认为卡顿
long st = dispatch_semaphore_wait(_semaphore, dispatch_time(DISPATCH_TIME_NOW, 50*NSEC_PER_MSEC));
if (st != 0)
{
if (_activity == kCFRunLoopBeforeSources || _activity == kCFRunLoopAfterWaiting)
{
if (++_countTime < 5)
continue;
NSString *track = [BSBacktraceLogger bs_backtraceOfMainThread];
NSLog(@"############### Main thread is blocked ###############");
NSLog(@"%@", track);
NSLog(@"############### Main thread is blocked ###############");
}
}
_countTime = 0;
}
});
