instruments

问题 does an entry in Instruments "leaked block" during application running imply memory leak? That is, if one is half way through using the iPhone application, where you might have some variables that have been retained but it hasn't got to the part of the application where it gets released, then do these show up as leaked blocks or not? If the answer is that variables which have not been finished with do show up here as leaked blocks, then this would be quite confusing then if you are stopping

问题 I want to use instrument to install the .app on my iOS simulator through my cocoa app. This is my first time developing a cocoa app and also NSTask. NSTask requires a launch path which in my case is irrelevant as this command can be run from anywhere. This is the command i want to run: instruments -t /Applications/Xcode.app/Contents/Applications/Instruments.app/Contents/PlugIns/AutomationInstrument.xrplugin/Contents/Resources/Automation.tracetemplate -w "iPad Retina (7.1 Simulator)" ""

问题 I have followed the Apple steps to get my app energy usage level from my device using Energy Diagnostics Instruments (https://developer.apple.com/library/ios/#documentation/DeveloperTools/Conceptual/InstrumentsUserGuide/Built-InInstruments/Built-InInstruments.html#//apple_ref/doc/uid/TP40004652-CH6-SW63). I have tried with my own app and with several apps from the AppStore and I always get all the info expected (including time flags) except the Energy Usage Info. Simply, the Energy Usage Bar

问题 I'm having (in my opinion) a very difficult problem in my code. It crashes randomly at different places in the code. The project is a ARC project. So my program crashes occaisonally with this messages: malloc: *** error for object 0xd2dd8b0: incorrect checksum for freed object - object was probably modified after being freed. *** set a breakpoint in malloc_error_break to debug I already set a breakpoint for malloc_error_break but I don't get any information out of it. When the code crashes

问题 I've diagnosed a strange behavior in an app : after 10 minutes or so, the CPU usage goes to 100%. There's no leak in the app, and it happens while the app is doing nothing. I can profile this with instruments using the "Time Profiler", but is there a way to find what the actual cause is ? 回答1: When profiling with Instruments (Time Profiler), look to see what method is using the majority of CPU time. Trace the calls back to see why. 来源： https://stackoverflow.com/questions/7388453/how-to-find

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 12 months ago . Who knows the most robust algorithm for a chromatic instrument tuner? I am trying to write an instrument tuner. I have tried the following two algorithms: FFT to create a welch periodogram and then detect the peak frequency A simple autocorrelation (http://en.wikipedia.org/wiki/Autocorrelation) I encountered

问题 I'm working on my first ARC & Core Data project, basing this stage on Xcode's (Universal) Master-Detail template. I note that Xcode5 has a memory display in the Debug Navigator but when using it find its graph bears few similarities with mem usage displayed in Instruments when running a Leaks&Allocations trace. I've done the Instruments tracing with the Simulator (simulating both iPhone & iPad - in case the 'unloading' of the detail View with the latter makes a difference) and on an iPad2 &

问题 I am Profiling an Application with Instruments. The profiling is done using Allocations Tool in two ways: By choosing Directly the Allocations when I run the App for Profiling By Choosing Leaks when I run the App for Profiling. In both the cases , I had Allocations tool enabled for testing. But surprisingly , I had two different kind of Out put for Allocations at these instances. Are they supposed to behave differently? or this is a problem with Instruments. The time I Profile the with Leaks

问题 Shark, Apple's profiler which let you configure custom performance counters, is no longer supported in OSX Mountain Lion since it can't run a 32-bit kernel. Instruments.app, Apple's replacement for Shark, doesn't seem to support reading performance counters such as L1 cache hits/misses**. Is there anyway to actually setup and read performance counters on OS X? Even if there is no application, is there some user-land API to do this? **Instruments.app does seem to have an interface for

问题 I need to lauch iOS Simulator that uses specific language using command line. So I found that I can use instruments -w <device> and it is working great, I can set specific device. But how can I run simulator with specific language? I've tried adding -AppleLanguages -AppleLocale but there are some warnings: Instruments Usage Error : Specified target process is invalid: -AppleLanguage thanks! 回答1: To run your app must be installed and located (if not, will open default language) Use this