golang profiling

instruction similar to the following:Add SP, SP, #NPop {R7, PC}This instruction can be said to be everywhere, see the BOF final instructions:We first point the PC to the Add SP, SP, #0x20, you can let the SP move forward 32 bytes, just can offset the system of 32 bytes, as follows:Take a look at the addresses we are concerned about:baseaddr:0x40025000R0:0xbefffa54ADD sp, SP, #0x20:0x0000839aPOP {R7, PC}: 0x0000839cFinally, we construct the following shellcode:' chmod 6755 su ' + ' \x00 ' * + '

MyBatis openSession (), close (), and commit () underlying code profiling, mybatisopensession I. What did openSession do in the MyBatis tool class? Mybatis tool class 1 private static final String RESOURCE = "mybatis-config.xml"; 2 private static SqlSessionFactory sqlSessionFactory = null; 3 private static ThreadLocal First, open openSession to find a method for implementing sqlsessionFactory. 1 package org.apache.ibatis.session; 2 3 import java.sq

accessor class object from the XML file Earth.xml, and the object constructs the World object NewWorld as a parameter.7, M_world. The Update (Drawargs Drawargs) function calls this only if the camera height is less than 30000 meters. Terrainaccessor. Getelevationarray (b,l,s) calculates the elevation of the terrain of the user's mouse click, as follows: (1) Judging whether the terrain tile service is empty, (2) Judging if the higher resolution dataset is empty, or (3) by calling Terraintileserv

->save_run ($xhprof _data, "Xhprof_yii");//Export the performance log to the folder you specified when you installed the extensionThen access the code you need to analyze to get a log file. F:\xhprof\xhprof_log\55fd13b01475f.xhprof_yii.xhprofThird, view the generated logConfigure a domain name, root directory to F:\xhprof\xhprof-0.9.4\xhprof_html.Access the domain name to view the log file you just generated.Resources Download:XhprofHttp://pecl.php.net/package/xhprofHttp://mirror.facebook.net/fa

STL source code profiling algorithm stl_algo.h -- merge sort ---------------------------------------------------------------------- Description: Merge Sorting. Ideas: 1. Semi-segmentation of intervals 2. Sort the Left and Right segments separately 3. Use inplace_merge to merge left and right segments into a complete ordered sequence Complexity: O (nlog n) Source code: Template Void mergesort (BidirectionalIter first, Bidirecti

STL source code profiling algorithm stl_algo.h -- inplace_merge Inplace_merge (used in ordered intervals) -------------------------------------------------------------------- Description: if the two connected sequences [first, middle) and [middle, last] are sorted, Then inplace_merge can combine them into a single sequence, which is still ordered. Source code: Template Inline void inplace_merge (BidirectionalIterator first, BidirectionalIterat

mechanism. In fact, the Pyfunctionobject object of the inner nested function inner_func is stored in the local variable of the outer function, and the Func_closure field in Pyfunctionobject is a tuple object that stores pycellobject. When executing Inner_func, the Pycellobject object stored in Func_closure is copied to the Pyframeobject free object of Inner_func, which is the storage space behind the cell object, so that the inner _func is referenced to value by Freevars (Note that this freevar

("Fromrealsubject");}}publicclass proxysubjectextendssubject{privaterealsubjectrealsubject; The //proxy role internally references the real role @Override public voidrequest () {prerequest (); // Actions that are attached before a real-world role Operation if (Null==realsubject) { realsubject=newrealsUbject ();} Realsubject.request (); //true character completion postrequest (); //actions attached after a real-world role Operation } privatevoidprerequest () {system.out.println (" Prerequest

private method Compilemoduleunit, the main is to do some module import work, the code is easy to understand, here is not detailed analysis.Now look back, in Ironpython/hosting/pythoncompiler.cs this file, there are still two classes left to mention:Resourcefile: Represents a related property of a resource file.Pythoncompilersink: The Accepted pool of Pythoncompiler compilation results is literally understood. As to how it works, let's leave it behind for analysis.So far, we have generally seen

) } v; uint32_t type_info; } U;} Zend_refcounted_h; $a = "Time:". Time (); $a -zend_string_1 (refcount=1) $b = $a; $a, $b -zend_string_1 (refcount=2) $c = $b; $a, $b, $c- zend_string_1 (refcount=3) unset ($b); $b = Is_undef $a, $c- zend_string_1 (refcount=2) not all data types use reference counts, long, double are hard copies, and reference counts are used only if value is the type of pointer (except interned string,im

Commercial:ANTS Memory Profiler:http://www.red-gate.com/products/dotnet-development/ants-memory-profiler/ANTS Performance Profiler:http://www.red-gate.com/products/dotnet-development/ants-performance-profiler/NET Memory profiler:http://memprofiler.com/JetBrains dottrace:http://www.jetbrains.com/profiler/download/index.htmlSciTech Memory profiler:http://www.scitech.se/Free:CLR profiler:http://msdn.microsoft.com/en-us/magazine/ee309515.aspxSOS Debugging Extension:http://msdn.microsoft.com/en-us/li

= Getlinebounds (i, R);Canvas.drawline (r.left, Baseline + 1, r.right, Baseline + 1, paint);}Super.ondraw (canvas);}}The main task is to overload the OnDraw method, take advantage of the Getlinecount function inherited from the TextView to get the number of lines that the text occupies, and getlinebounds to get the datum height value of a particular row, and the second parameter of the function returns the "outer wrapper" value of this line. These values are then used to draw the lines of this

Global constructs and destructors:Template inline void _destroy (char*, char*) {}inline void _destroy (int*, int*) {}inline void _destroy (long*, long*) {}inline void _ Destroy (float*, float*) {}inline void _destroy (double*, double*) {} #ifdef __stl_has_wchar_tinline void _destroy (wchar_t *, wchar_t*) {}To globally replicate and populate bulk data functions:Files: Stl_uninitialized.h Analyze one of the many functions: the Uninitialized_copy function. There are three versions of this function:

Find the development and debugging tools. this post is based on the runtime profiling tool. lasthope is last edited on 2015-03-2412: 43: 03. a lot of include, require, nbsp; nbsp; is there a debugging tool like this? This post was last edited by lasthope on 12:43:03A web page is often nested with many include, require. Is there a debugging tool like this? when I run a PHP page, it sends all the executed code to my log, such Line X of A. php, source

CLR Exploration Series: windbg + SOS profiling reveals the domain world In the world of CLR, there are a series of amazing technologies and architectures. Specifically, CLR appliesProgramA series of technologies, such as memory allocation, execution model, and interaction between programs, are worthy of further exploration by every technical staff dedicated to the DOTNET platform.During the development process, if programmers load the Assembly (assem

...] Runs the main method of class with the specified arguments. The storm jars and Configs in ~/.storm is put on the classpath. The process is configured so Stormsubmitter (Http://nathanmarz.github.com/storm/doc/backtype/storm/StormSubmitte r.html) would upload the jar at Topology-jar-path when the topology is submitted. """Exec_storm_class (Klass, Jvmtype="-client", Extrajars=[jarfile, Conf_dir, Storm_dir +"/bin"], args=args, jvmopts=["-dstorm.jar="+Jarfile]) defExec_storm_class (K

Shared_clean Shared_dirty Private_clean Private_dirty: several fields.Find the relevant code, you can see, a page if the number of maps >=2 counted into shared_* ; if =1 is counted into Private_ *. (The dirty page counts into the *_dirty, otherwise counts into the *_clean)The sum of the shared_* values of all segments within the smaps file is the amount of shared memory that is process accurate! The sum of the private_* values of all the segments in the smaps file is the total amount of exclus

Real time includes CPU times and waiting, switching, and so on, so it is generally larger than the CPU. Comparisons can determine if the time-consuming operation is within the CPU execution segment. C. The% of the above four indicators indicates the percentage of the function in total time. Easy to see the time ratio of a function. D. calls+recurcalls/total represents the number of external calls + recursion count/total number of times. You can see if the number of calls matches your expectat

Original article: Http://www.infoq.com/cn/news/2011/08/jprofiler7 J-Technologies Co., Ltd. released jprofiler 7.0 some time ago. Jprofiler is a Java SE/EE profiling tool that features CPU analysis, memory analysis, thread analysis, and Vm telemetry. New Features of version 7.0 include: Analyze the built-in probes for JDBC, JMS, JNDI, Servlet, files, sockets, and processes. You can use the API to customize the probe, or directly configure it in the

MySQL performance profiling tool (pt-query-digest) This tool is also from percona-toolkitOther tools in this tool setTroubleshooting of abnormal shutdown of MySQL Slave (pt-slave-restart)Verify MySQL master-slave consistency (pt-table-checksum pt-table-sync)It can analyze various logs to analyze performance issuesIncluding1. Slow log (default)2. tcpdump3. general log4. binlog5. show processlistThe experiment simulates a certain amount of pressure thr