software instruments

released and use the object, two is If you use the instruments tool to detect memory leaks, this use of autorelease will also be treated as memory leaks, pay attention to identify .... 8 for Nsmutablearray This kind, when AddObject, when the corresponding is added to the array of the object's reference count will be + 1, when the array itself is released, it will first send a release message to all objects in the array.

Reprinted from: Http://www.uml.org.cn/mobiledev/201212123.asp (or http://www.cocoachina.com/bbs/read.php?tid=129734 keyword=instrument)--"The project file is going to be in the second link, I don't know how to upload it to the article.From: Written in front, this leaks tool does not seem to be always right, I just ran into a lot of running a program after the show has a red post, but a bit to locate the main function, ask the group of a buddy, he said don't care too much, may be a system problem

Detecting memory leaks: leaks in instrumentsObjectiveIf you want to detect a memory leak, we will use the leaks tool in the XCODE7 instruments to detect.The current development environment is arc, so there are few memory leaks. But we must keep good code of the normative. For example: Use notification, do not forget to remove; Use Presentviewcontroller to eject the new controller, don't forget dismiss and so on.If a memory leak occurs, a third-party f

Reprint: http://www.zhimengzhe.com/IOSkaifa/255950.htmlThe previous article I introduced Instruments's tool classification and basic use method, today I come to you to talk about leaks use method.In the early development of iOS, there was no arc mode, only the MRC mode, the developer must manage the memory, the process is very cumbersome and easy to cause memory leaks, today's iOS development although the basic use of the ARC mode, but in some cases, we need to manage the memory, slightly carele

iOS Development 74-xcode (7.3.1) uses the instruments (7.3.1) test memory leak example (circular reference) to intentionally write a memory leak code, circular reference in the ARC environment. Two objects are strong references and point to each other, resulting in a memory leak. -(void) viewdidload { Leakmodel * Leaka = [[Leakmodel alloc]init]; Leaka.myname = @ "Leaka"; Leakmodel * leakb = [[Leakmodel alloc]init]; Leakb.mynam

On Mac OS, programs could need Instruments to tuning, and if you face too many probe messages, you'll need some Flame grap Hs.Here I introduce Brendan Gregg and his blog:Http://www.brendangregg.com/FlameGraphs/cpuflamegraphs.htmlAnd he mestioned one guy make a Flame Graphs with Instruments:Https://schani.wordpress.com/2012/11/16/flame-graphs-for-instrumentsAnd then I try to make some flame on OSX.1. Open Xcode2. Input Command+i to open Instruments3. C

Using coreanimation in instruments to analyze animations1. Open the coreanimation in instruments2. Pre-run preparation workBe careful to check the following options for easy commissioning3. Operation and CommissioningSome details to keep in mind:1. If the screen has more than 50% of the area is composed of a translucent layer overlay, if you perform a sliding operation, it is likely to lead to the Dayton.2. Load the picture try not to perform a zoom o

Recently encountered two problems in the use of Appium is tricky, spend a lot of time to solve, record.1.appium chromedriver error when switching from Nativeapp to WebView in hybrid applications, prompting Chromedriver version must be xxx,chrome version must be greater than XXXX, This is because the Chromedriver version in Appium is too high and must be replaced by a lower version of Chromedriver, such as version 1.4. Download a lower version of Chromedriver and replace the chrome driver in the

1. Create Project2. Load Source code3. Connect iphone or virtual machine, select App4. Open Developer Tool, Instruments, Xcode3.1 Open Allocations (page contains: Allocations, VM Tracker)3.2 Right "+", select Leaks5. Open the page, stay for a while, and then test the next page with the green, red, or gray symbols appearing on the chart6. Click on the image on the red match, details, select "Cycles Roots", click on the right Strack Trace, and the meth

In iOS 5.0 and later versions, the ARC mechanism is added. However, memory leakage may still exist due to the complicated mutual reference relationship. Therefore, it is important to understand the principles.This article describes how to use Instruments to find memory leaks in the program and how to use NSZombieEnabled without ARC.This article assumes that you are familiar with the Obj-C memory management mechanism.Development Environment of the expe

 2014 TI Cup undergraduate electronic Design competition regional competition use of instruments and devices, equipmentA) 3a/30v two-way regulated power supply (can be paralleled);b) 60MHz oscilloscope;c) Three-bit half-digital multimeter;d) Low frequency (10MHz) signal source;e) Low frequency AC millivolt meter.1. ay-ldc1000 Evaluation Board (must be used in the game, TI according to the number of registrations 30% allotted).2. AY-TPA3112D1 Evaluat

Encounter this similar [xx retain]: message sent to deallocated instance, the problem.Using the method (Command + Shift + B) to analyze the memory leaks is no longer sufficient.Using instruments's leaks tool to detect memory leaks during app runs can save you a lot of development costs.The steps are as follows:OrThe shortcut key (Command + Control + I) directly brings up the instruments tool, such as (inside the red box):After selection, the display

The Alloctions tool is used to keep track of app memory usage.The instrument tool requires you to load a process so that it can collect data after the process has started.The Instrument tool captures the following information:Cotegory: A category, typically a core foundation object, a Object-c class, or a raw memory block (block). Here we actually just have to read all the heap Anonymous VMs (heap allocations and anonymous virtual machines) This line of data is basically OK.Persistent Bytes: Th

Currently, the developed applications use the arc technology, but the memory is still very large. With the instruments used to detect the memory, the memory of the program is always more than 1 MB at the beginning, this is not the case. On the contrary, we find that when you keep running your program cyclically, after a certain period of time, it will stabilize around a certain value. Why? I wonder if I want to release all the view controllers and it

mode V: Selected by character V: Selected by row Combined with edit command: d,c,y Undo Action U: You can generally undo the last 50 operations #u: Undo Previous # Operations Revert to previous revocation Ctrl+r Repeat previous action . Vimtutor command to open the VIM tutorial Note: the "100,2-9 14%" displayed in the lower right corner represents the 100th pa

), 0 represents the first channel, a total of 16 channels, that is, 16 instruments can be played at the same time, icannel is the channel number, idata1 is the symbol code, 0 is the lowest, 127 is the highest, C is 60 in the center of the piano keyboard, idata2 is the volume or intensity (I do not quite understand, you can use 100 for a disk ). This information is carried out in the send function.AndAfter calculation and shift operations, obtain infor

"Data Recovery failure description"Company financial personnel for data maintenance, misoperation, in the financial software to initialize the data, because recently did not do backup, it caused a lot of financial documents lost.Because the financial data is very important, the customer is anxious to get back.The data Recovery Analysis "Engineer detection, in SQL Server database Enterprise Manager, discover what the

Software can be roughly divided into: Free Software and non-free software Types of Free Software and non-free software.The following are some terms that are frequently mentioned when discussing free software. They explain which types overlap with others or are part of o

Software Engineering-software testing, Software Engineering Software Testing After the system is complete, it is time to test the system. This must have been the first system of acceptance. We are confident that the system will be accepted by the master. Once it comes to the master, nothing will happen, in addition, so

in the area of storage, there have been too many new concepts in recent times, including "Software-defined storage", " Server SAN " and" cloud storage ". A lot of concepts make people foggy, unintelligible. So what exactly is software-defined storage? What is a Server SAN? What is cloud storage? In fact, many storage vendors are not well defined, the industry does not have a consistent clear definition. Man