Our server project has a good tens of thousands of lines of code, yesterday wanted to analyze its performance bottlenecks, to see if there is no place to optimize.GCC provides a __pretty_function__ macro, which is placed in which function body, which represents the name of the function, similar to __line__. With this macro, we can insert a few lines of code into each function body and log the called log.I wrote a script in Python to analyze functions in all the. cpp files, with three lines of co
The following code is my summary of the predictive Results analysis tool function for two classification problems. The Code has a detailed documentation description. So you can look at the code directly.
#-*-Coding:utf-8-*-from
__future__ import print_function from
__future__ Import Division
import NumPy as N P
Import pandas as PD
import Matplotlib.pyplot as Plt
from sklearn.metrics import Roc_curve, AU
The interview will be Beimian to the problem is: give the Web server access log, please write a script to statistics access to the top 10 IP? What are the top 10 requests for access? When you get to know the goaccess, you'll understand that the only thing that can be done is to put a or C in addition to the ability to memorize your scripts.
For nginx log analysis, there are many tools, measuring the standard of good or bad is probably th
Hprof is a PHP lightweight performance analysis tool for Facebook, which is similar to Xdebug, but has a lower performance cost, can be used in a production environment, and can be controlled by a program switch. Based on browsing
Performance Analysis user interface can be easier to view, or share the results with peers. You can also draw the call graph. During
The interview will be Beimian to the problem is: give the Web server access log, please write a script to statistics access to the top 10 IP? What are the top 10 requests for access? When you get to know the goaccess, you'll understand that the only thing that can be done is to put a or C in addition to the ability to memorize your scripts.
For nginx log analysis, there are many tools, measuring the standard of good or bad is probably three fast: Ins
Label:MySQL comes with profiling performance analysis tool1. Show variables like '%profiling% ';(View profiling information) www.2cto.com2. Set profiling=1; (Turn on profiling)3. Execute SQL query Example: Select Goods_name from Ecs_goods where goods_id 4. Show profile for query 4;The format of show profile is as follows: Show profile [Type [, type] ...] [for QUERY N] [LIMIT row_count [offset offset]] type: all | BLOCK IO | CONTEXT Switches | CPU |
generated by adding other parameters cannot be opened.Jvisualvm can also heapdump the corresponding hprof file (default storage path: Under the monitored server/tmp), which can be analyzed using hpjmeter.
GcviewerHttp://www.tagtraum.com/gcviewer.htmlSupportedSun JDK 1.4/1.5 with the options-xloggc: Sun JDK 1.2.2/1.3.1/1.4 with the option-verbose: GCIbm jdk 1.3.1/1.3.0/1.2.2 with the option-verbose: GCIBM iseries classic JVM 1.4.2 with option-verbose: GCHP-UX JDK 1.2/1.3/1.4.x with the option-xv
Php performance monitoring extension xhprof performance analysis tool
Php performance monitoring extension xhprof is a good tool in general. This section describes how to install and use it in ubuntu.Install xhprof:
Wget http://pecl.php.net/get/xhprof-0.9.2.tgz
Tar zxf xhprof-0.9.2.tgz
Cd xhprof-0.9.2/extension/
Sudo
****************/") datas.appen D ("Cocos2d::ui::layout * _root_layout;") Datas.append ("Cocostudio::timeline::actiontimeline * _root_action;") Datas.append ("") for item in All_items:datas.append (Get_csd_type_2_cpp (item["type"]) + "+ item[" name "] + ";") Datas.append ("/**************** csdanalysis End ****************/") else:print file_name + "not find" or "en D with. CSD "return Datasdef analysis_file_cpp (file_name): Datas = [] If File_name.endswith (". CSD ") and O
of the Android system, which shows us the main power source for the CPU and LCD in the current system. Pie View and start view are another way to display information.Of course, in addition to viewing the power consumption of the system components, we can also view the power consumption generated by the running processes in the current system by clicking Application View. such asFigure Four:Note: Shows us the power consumption generated by applications running in the current system, which, of co
ValgrindIt is a software development tool for memory debugging, memory leak detection and performance analysis. The name Valgrind is taken from the entrance of the temple of the fallen in Norse mythology.
general use mode Valgrind--leak-check=full./a.out
ValgrindThe original author was Julian Seward, who won the second Google-o ' Reilly Open source Code award in 2006 for his work on the development of Valg
IBM Heapanalyzer is a free graphical analysis tool for the JVM memory heap, which can effectively enumerate the memory usage of the heap and help analyze the cause of the Java memory leak.
Download after decompression has a Ha413.jar
Operating Environment requirements:
1, using Java 2 Platform, JDK 1.6 or to run IBM Heapanalyzer
2. Then configure the environment variables
To Run the command:
For Example:
1. Background
A Awaitility QuickStart article was introduced earlier: the asynchronous validation Tool awaitility a quick start, which solves the problem of verifying asynchronous operations, which encapsulates a lot of handy usage, focusing on polling the results within a specified time; This article in the source code, Introduce how the tool is implemented inside, understand the development of design ide
MYSQL official tool WorkBench Design Database essentials AnalysisThe beautiful Life of the Sun Vulcan (http://blog.csdn.net/opengl_es)This article follows "Attribution-non-commercial use-consistent" authoring public agreementReprint Please keep this sentence: Sun Vulcan's Beautiful Life-this blog focuses on Agile development and mobile and IoT device research: IOS, Android, HTML5, Arduino, Pcduino , Otherwise, the article from this blog refused to r
Tags: get open CTI count for close argv list src Because the database additions and deletions suddenly burst, need to query is the operation of those tables is particularly frequent, wrote a tool to analyze Bin-log, find and add to change the table, and the number of operations in descending order, the following is the code:
1 2 3 4 5 6 7 8 9 Ten One A - - the - - - + - + A at - - - - - in - to + - the * $
1. Conclusion:The SAR command is a common tool for analyzing system performance on Linux systems, and can be used to view CPU, memory, disk IO, file read and write, system calls,2, the SAR will have a scheduled task, regularly record the current system information to/VAR/LOG/SA/XX, the default is to record every 10 minutes, when the SAR command does not specify the interval and number of times, is to display historical data.The SAR can also specify re
JQuery source code analysis-03 construct a jQuery object-tool function. For more information, see. Author: nuysoft/high cloud QQ: 47214707 EMail: nuysoft@gmail.com
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Read, write, or something wrong. Please tell me more about the progress. The PDF in this chapter has been
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