![]() ![]() For more information, see Vance Morrison's blog post. To collect events on Arm systems, use Windows Performance Recorder (WPR). PerfView cannot be used to collect events on Arm systems. For more information, watch the PerfView tutorial videos. PerfView is a free tool and can be downloaded from the Microsoft Download Center. ![]() It also includes a configuration GUI that lets you turn logging for different types of events on or off. PerfView uses ETW events to help you do all sorts of performance investigations on your app. When the app is instrumented, you're ready to gather events. Public sealed partial class MainPage : PageĪ() Using AppEventSource from the previous example, you can instrument an app as follows: using System Instrumenting an app is straightforward: Just call the appropriate method on the derived class. When your app has finished syncing new stories. When your app begins syncing new stories. When old RSS stories are deserialized from local storage. A few interesting locations to log an event are: When examining app startup, the start event is generally the "Process/Start" event that the operating system emits.įor example, suppose you are creating an RSS reader. It's often useful to have paired start and stop events for every operation. Also, the events themselves log only a single instance in time. You should understand which events in code correspond to user interactions, measure those, and improve those benchmarks. Most app code will run after these events. Note that these events are purely illustrative. This helps tooling associate the index of the WriteEvent method with the method that was called on AppEventSource. Second, each event method has an EventAttribute. That instance will be used for all logging. First, a singleton is created in AppEventSource.Log. must increment with each logging method. The numbers passed to WriteEvent and EventAttribute Public static AppEventSource Log = new AppEventSource () Public sealed class AppEventSource : EventSource The time until the MainPage constructor was called. The time until the App class constructor was called. A singleton pattern is generally used for each EventSource.įor example, the class in the following example can be used to measure two performance characteristics: Generally, you create a subclass of EventSource and wrap the Write* methods with your own event methods. Use the EventSource class to emit events.ĮventSource provides a base class from which to create a custom event provider. You can then use a tool called PerfView to easily view and analyze of ETW events. NET Framework and Windows use an event framework called Event Tracing for Windows (ETW) that allows your app to notify tooling when events happen. To facilitate performance investigations. This topic helps you get started with the basic instrumentation needed to measure this startup improvement. This improvement is particularly noticeable on portable, low-powered devices and with complex apps. NET Native significantly improves the launch time of apps. ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |