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Article, where the information may have evolved or changed.
Summary
Original: Brendan Gregg ' s Blog: "Golang bcc/bpf Function Tracing", 2017 Jan
Intro: GDB, go execution Tracer, Godebug, Gctrace, Schedtrace
First, Gccgo Function counting
Second, Go GC Function counting
Iii. per-event invocations of a function
Iv. Interface Arguments
V. Function Latency
Vi. Summary
Vii. Tips: Building LLVM and Clang
development, the call track of functions can be very complex. the console. trace () method can clearly output the function calling process to the console.
function tracer(a) { console.trace(); return a;}function foo(a) { return bar(a);}function bar(a) { return tracer(a);}var a = foo('tracer');
Table
Use console to present objects in tables
The input o
configure a static route. If you work in an enterprise, it is often enough to configure a simple static route.
I demonstrated it with CPT (Cisco Packet Tracer) to be more convincing and easy to understand.
Shows the topology:
There are four network segments: 10.0.0.0/8, 112.237.228.0/24, 192.168.10.0/24, and 211.86.104.0/24.
Static route settings are as follows:
iproute192.168.10.0255.255.255.0112.237.228.1
iproute211.86.104.0255.255.255.0112
when many projects start, or many features are planned, the first step is demand analysis. Demand analysis is a critical step in the entire software development. Sometimes, however, the development team is not sure what the feature is, and they naturally don't know it because they are not users. Real demand is only known to the user. However, you do not necessarily have a lot of time to communicate with users, and users may not necessarily be able to express his true ideas perfectly without ambi
similar functions:
Yahoo! Yslow?
Developers can use yslow to analyze webpages. yslow will give suggestions based on rules for high performance web pages (High Performance Web pages:
Using speed trace for Performance Analysis (profile with speed tracer )?
The speed tracer tool helps developers identify web application performance problems. This engineer analyzes the web application performance from the b
the same time, the kernel provides related examples sample/trace_events.c.
Several important files under/sys/kernel/debug/tracing:
Trace: Tracer output
Available_tracers: available Tracer
Current_tracer: Current enabled Tracer
Tracing_enabled: Switch
Example:
# Echo function> current_tracer
# Echo 1> tracing_enabled
# Cat trace> trace.txt
# Echo 0> tracing_ena
name of the calling method function. is actually triggering the result of its staticmethod adorner.--------------------------------------------------------------------------------------------------------------- ----------------------Adorner exampleAs previously described, the __CALL__ operator overload method implements a function call interface for a class instance.The following program defines a class in such a way. Stores the decorated function in the instance and captures the call to the or
slightly different from the official website.Follow the page of the Tomcat installation method that was added to the zorka.properties file:Zorka.spy.compute.frames = yesThis line. After the modification, we try to start Tomcat and do some work, and we can see that the Zorka log is generated under Zorka\log. But there is no trace of monitoring, note this sentence:Adjust other settings in Zorka.properties if necessary (log files, listen port number etc);Therefore, you may also need to set the loc
track the calling procedure of a function.
In large projects, especially in framework development, the call trajectory of functions can be very complex, and the Console.trace () method can clearly output the called procedure of a function to the console.
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function Tracer (a) {console.trace (); return A;} function foo (a) {return bar (a);} function Bar (a) {return
set by the hour hand is 360 degrees, one lap 12 hours 360/12 =Tracer (False)#cancels the animation, the word hits directly on the canvasPrinter.forward (65) Printer.write (Week (t), align="Center", Font=("Courier", 14,"Bold")) Printer.back (130) Printer.write (Date (t), align="Center", Font=("Courier", 14,"Bold") ) Printer.home () tracer (True)#Turn on animationOnTimer (Tick,100)#continue calling tick afte
Yesterday, and friends in the computer room to discuss the problem of networking, when the discussion to the router communication, friends asked why not to configure the routing protocol. It used to be based on configuration manuals or experience configurations and did not carefully consider the issue. Think about it, it should be so understood (as follows).
If you want to implement communication between multiple network segments, you must use a router, which is no doubt. If multiple network se
This is the Mac from the system Information.app (about this Mac).
Mechanism
When we click on the Store button, the Mac background will be spotlight to audio,movie,apps the properties of the file.
Spotlight is indexed by the Mac's set of metadata mechanisms, metadata can be understood as a quick classification and metadata index for the entire file system, like a dictionary catalog, which can be felt
The size and use of various icon and launch image of app
ios7,8
Asset
IPhone 6 Plus (@3x)
iphone 6 and iphone 5 (@2x)
IPhone 4s (@2x)
ipad and ipad mini (@2x)
ipad 2 and ipad mini (@1x)
APP icon
180 x 180
120 x
120 x
152 x 152
76 x
App icon for the app Store
1024 x 1024
1024 x 1024
1024 x 1024
1024 x 1024
1024 x 1024
Launch image
1242 x 2208 (Portrait)2208 x 1242(Landscape)
Fo
icons are a necessary part of the iOS package. If you do not have the various size icons required by the program, the program may fail to pass validation when uploading the publication. iOS programs define multiple icons with different specifications for different application scenarios, and differentiate between different names:iOS icon Size listiphone Special Program:Icon Name size fillet use requiredIcon.png X 10px for program store and display required in iphone/ipod touch[Email protected] X
window of an application* Cmd + F: search in the Application* Cmd + Space: Use Spotlight for desktop search* Fn + Backspace: equivalent to the Delete key in Windows (dedicated for laptops, with the Delete key for desktops)* After you hear the boot tone, press and hold the Option (equivalent to the Alt of Windows) key to start Windows or Mac.* When the boot starts, when you hear the boot sound, press the "T" key to bring the computer into the target d
]; // attenuation coefficient
After the program is executed, the effect is as follows:
Complete code can be found:
Project File mytutoriald3d11_21
Download Code:
Http://files.cnblogs.com/mikewolf2002/myTutorialD3D11.zip
Next, we will implement the spotlight effect. As shown in, only the inner angle of the Cone can be reached by the illumination. However, if we only consider the Inner Corner, our light will be relatively stiff. Inside the Inner Corn
controls the stretch degree of the Shadow texture of the light.
Ii. Lighting and lighting
1. Type:
(1) bulb: a light source. It will light up all faces toward it.
(2) Parallel lighting: like the sun, when the light casts a shadow, the angle of the shadow is the angle from which the light shines on the object to the ground.
(3) Target Spotlight: a parallel light that is projected to the target. It can be moved independently.
Free
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