performance profiling

First, Directory1. Initiation Knowledge Preheating: CAs principle +JVM object Head memory storage structure2.JVM Lock Optimization: Lock coarsening, lock elimination, biased lock, lightweight lock, spin lock.3. Summary: Biased lock, lightweight lock, the advantages and disadvantages of heavy-lock.Second, the initiation of knowledge preheatingIntroduction of 2 concepts before starting this article2.1.cas operationTo improve performance, many of the JVM

->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.ne

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

Linux Top Command detailedIntroductionThe top command is a common performance analysis tool under Linux that shows the resource usage of individual processes in the system in real time, similar to the Task Manager for Windows.Top display system current process and other conditions, is a dynamic display process, that is, you can continue to refresh the current state through the user keys. If the command is executed in the foreground, it will monopolize

of the parameters in parentheses. The parameter interpretation recognizes local and global variable names, constant values, branch targets, and compare oper Ators.As you can see, in the while 1 here (line 3rd), Direct is the jump_absolute instruction;And while true here (line 5th) consists of load_name and pop_jump_if_false directives.Original true in Python2 is not a keyword, just a built-in variable, bool type, the value is 1, that is, true+true output 2.It can also be assigned value. Fo

process saves the previously read-in fields in buffer.　　The basic principle of Linux is that no resources should be wasted. Therefore, the core uses as much RAM as possible to cache information from local and remote file systems. When the system does read and write operations, The data associated with the currently running process is stored in RAM as much as possible. The system-reported cache is the sum of both the buffer and the page cache. The cache is not recycled at the end of the process

one of the visual views and click "..." to select the collationIf you want to see the updated data, then only need to click Refresh, Powerbi will automatically connect to the scom SQL to get the latest data to show, very convenientIf you want to view all CPU, memory, and Logical disk metrics on a time-based basis, then you can click DateTime to select a specific time, and all visual views will be linked together to change , very beautifulYou can also select an advanced filter to specify a speci

module directly and add it to the previous Backup module collection extensions. Otherwise you need to search the module package path and the system default path whether there is the module, if you do not find the module, then error. When the module is found, the module is initialized and the module reference is added to the sys.modules . Load_module This function requires additional instructions, and the function uses different loading methods depending on the type of module, the base type

Ns_write_to_socket function!\n", Conn->flags, (conn->sock!= null?conn->sock:-1));//just for debugging Ns_write_to_socket (conn);} }}} Loop=0; for (conn = mgr->active_connections; conn! = NULL; conn = tmp_conn) {printf ("The For Loop %d times\n ", loop++); tmp_conn = Conn->next;if (Conn->flags nsf_close_immediately) | | (Conn->send_iobuf.len = = 0 (conn->flags Nsf_finished_sending_data))) {printf ("for the Flag--%d--2--, for the sock--%d--call Ns_close_conn function!\n", Conn->flags, (conn

C ++ code coverage profiling with GCC/gcov Submitted by bobah on Wed, 01/27/2010-17:42 Http://www.bobah.net/d4d/tools/code-coverage-with-gcov The coverage analysis with GCC/gcov includes three following steps * Instrumented application build-libraries, executable (s), and profiling artifacts (*. gcno files) are created* The application test run (s)-the runtime coverage statistics (*. gcda files) is collect

Problem: We look forward to automating tasks in our SQL Server Analysis Services server. Would you please explain to us how to use the profiling service in SSIS to perform DDL tasks (Analysis Services Execute DDL Task) details? Expert Answer: The Profiling service performs DDL tasks (Analysis Services Execute DDL Task) is a useful tool that allows you to do anything with a SQL Server Analysis service ins

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