How threads differ from processes Threads differ from traditional multitasking operating system processes in that: processes are typically independent, while threads exist as subsets of a process processes carry considerably more state information th…

A process is an executing instance of an application. What does that mean? Well, for example, when you double-click the Microsoft Word icon, you start a process that runs Word. A thread is a path of execution within a process. Also, a process can con…

Events and the event loop Being an event-driven toolkit, events and event delivery play a central role in Qt architecture. In this article we'll not give a comprehensive coverage about this topic; we'll instead focus on some thread-related key concep…

The present invention allocates resources in a multi-operating system computing system, thereby avoiding bottlenecks and other degradations that result from competition for limited resources. In one embodiment, a computer system includes resources an…

本文转载自:https://www.codeproject.com/articles/11132/walking-the-callstack Download demo project with source - 64.2 Kb Introduction In some cases you need to display the callstack of the current thread or your are just interested in the callstack of othe…

catalogue . 相关基础知识 . Deviare API Hook Overview . 使用ctypes调用Windows API . pydbg . winappdbg . dll injection . process monitor with WMI . sobek-hids 0.  相关基础知识 0x1: Python 程序和 C 程序的整合 为了节省软件开发成本,软件开发人员希望能够缩短的软件的开发时间,希望能够在短时间内开发出稳定的产品.Python 功能强大,简单易用,能…

/* * Copyright (c) 2008, The Android Open Source Project * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * Redistributions…

  步骤1.adb shell (进入linux的底层) 步骤2.echo 3>/proc/sys/vm/drop_caches(清除系统cache) 步骤3.top -d 1|grep com.waboon.jade_chain  (每一秒打印一次需要测试的应用的资源利用情况) 也可以按如下的命令: 1.adb shell  "top -d 1 | grep  com.waboon.jade_chain>/sdcard/log.txt     把打印的资源利用情况写入log.txt…

About SQLite See Also... Features When to use SQLite Frequently Asked Questions Well-known Users Books About SQLite Getting Started SQL Syntax Pragmas SQL functions Date & time functions Aggregate functions C/C++ Interface Spec Introduction List of C…

import threading, os, subprocess, time exec_path = "/home/xhz/gems/ruby/amd...../bin/tester.exec" out_data_path = "/home/xhz/...generated/" max_process = 5 processes = set() exec_commands = [] for id in xrange(1,45,2): stat_filename =…

完整读完Google的三篇谈Hackable Projects的文章,以及一篇从Test Pyramid看UnitTest的比重.一篇谈Optimal Logging的文章,感觉这5篇在测试.日志两个方面对工程的速度.大小.解耦三个方面做了深入而系统的解读,非常值得一看,专业的测试角度剖析工程,有一种解剖学的感觉,这刷新了我对测试的理解,我估计职业的开发工程师里能有这么全面的视角的估计比例本就不高.此处简要摘录做个笔记,结合自己的经验体会,在这方面会有系统化的视角. Hackable Proje…

http://www.admin10000.com/document/4196.html 前言 很多Node.js初学者都会有这样的疑惑,Node.js到底是单线程的还是多线程的?通过本章的学习,能够让读者较为清晰的理解Node.js对于单/多线程的关系和支持情况.同时本章还将列举一些让Node.js的web服务器线程阻塞的例子,最后会提供Node.js碰到这类cpu密集型问题的解决方案. 在学习本章之前,读者需要对Node.js有一个初步的认识,熟悉Node.js基本语法.cluster模块.…

http://sqlite.org/whentouse.html Appropriate Uses For SQLite SQLite is not directly comparable to client/server SQL database engines such as MySQL, Oracle, PostgreSQL, or SQL Server since SQLite is trying to solve a different problem. Client/server S…

refer to http://www.programmerinterview.com/index.php/operating-systems/thread-vs-process/ A process is an executing instance of an application. What does that mean? Well, for example, when you double-click the Microsoft Word icon, you start a proces…

:boa.thttpd.mini_httpd.shttpd.lighttpd.goaheand.appweb和apache等. Boa 1.介绍 Boa诞生于1991年,作者Paul Philips.是开源的,应用很广泛,特别适合于嵌入式设备,网上流行程度很广.它的官方网站说boa是最受人喜爱的嵌入式web服务器.功能较为强大,支持认证,cgi等.Boa 是一个单任务的HTTP SERVER,它不像传统的web服务器那样为每个访问连接开启一个进程,也不会为多个连接开启多个自身的拷贝.Boa对所有…

一.方法 /** * 执行一个shell命令,并返回字符串值 * * @param cmd * 命令名称&参数组成的数组(例如:{"/system/bin/cat", "/proc/version"}) * @param workdirectory * 命令执行路径(例如:"system/bin/") * @return 执行结果组成的字符串 * @throws IOException */ public static synchroni…

by Anthony Vallone How long does it take to find the root cause of a failure in your system? Five minutes? Five days? If you answered close to five minutes, it’s very likely that your production system and tests have great logging. All too often, see…

A context switch (also sometimes referred to as a process switch or a task switch) is the switching of the CPU (central processing unit) from one process or thread to another. A process (also sometimes referred to as a task) is an executing (i.e., ru…

目录(?)[-] Boa Thttpd Mini_httpd Shttpd Lighttpd Goahead AppWeb Apache 开发语言和开发工具 结论 备注   现在在嵌入式设备中所使用的web服务器主要有:boa.thttpd.mini_httpd.shttpd.lighttpd.goaheand.appweb和apache等. Boa 1.介绍 Boa诞生于1991年,作者Paul Philips.是开源的,应用很广泛,特别适合于嵌入式设备,网上流行程度很广.它的官方网站说boa…

介绍 You’re doing it wrong. — Bradley T. Hughes 线程是qt channel里最流行的讨论话题之一.许多人加入了讨论并询问如何解决他们在运行跨线程编程时所遇到的问题. 快速检阅一下他们的代码,在发现的问题当中,十之八九遇到得最大问题是他们在某个地方使用了线程,而随后又坠入了并行编程的陷阱.Qt中创建.运行线程的“易用”性.缺乏相关编程尤其是异步网络编程知识或是养成的使用其它工具集的习惯.这些因素和Qt的信号槽架构混合在一起,便经常使得人们自己把自己射倒在…

Adjusting Process Priority with nice   When Linux processes are started, they are started with a specific priority. By default, all regular processes are equal and are started with the same priority, which is the priority number 20. In some cases, it…

转自:http://blog.csdn.net/changsheng230/article/details/6153449 续上文:http://blog.csdn.net/changsheng230/archive/2010/12/27/6101232.aspx 由于最近工作比较忙,出了趟差,还是把这篇长文.好文翻译出来了,以飨读者.同时也是自己很好的消化.学习过程 Qt 线程类 Qt对线程的支持已经有很多年了(发布于2000年九月22日的Qt2.2引入了QThread类),Qt 4.0版本的…

Android内存限制 java虚拟机有内存使用上限的限制 adb shell进入手机,这此參数被纪录在/system/build.prop中,假设想直接查看能够使用adb shell getprop 单个应用程序最大内存限制,超过这个值会产生OOM dalvik.vm.heapgrowthlimit 应用启动后分配的初始内存 dalvik.vm.heapstartsize 单个java虚拟机最大的内存限制,超过这个值会产生OOM dalvik.vm.heapsize 小米2S的一些内存限制 #…

Nginx+Python+uwsgi+Django的web开发环境安装及配置 nginx安装 nginx的安装这里就略过了... python安装 通常系统已经自带了,这里也略过 uwsgi安装 官网 http://uwsgi-docs.readthedocs.io/en/latest/ 安装步骤如下: yum -y install python-devel wget -c https://projects.unbit.it/downloads/uwsgi-2.0.14.tar.gz tar z…

In 2.6.x, there are 3 mechanisms for implementing a bottom half: softirqs, tasklets and work queues. Here's the comparison: Softirqs: Softirqs are statically allocated at compile time. It is represented by the softirq_action structure, which is defin…

GDB scheduler-locking 命令详解 GDB> show scheduler-locking     //显示线程的scheduler-locking状态GDB> set scheduler-locking on    //调试加锁当前线程,停止所有其他线程 set scheduler-locking modeSet the scheduler locking mode. It applies to normal execution, record mode, and repl…

D. Red-black Cobweb time limit per test:6 seconds memory limit per test:256 megabytes input:standard input output:standard output Slastyona likes to watch life of nearby grove's dwellers. This time she watches a strange red-black spider sitting at th…

初始化/销毁线程属性 int pthread_attr_init(pthread_attr_t *attr); int pthread_attr_destroy(pthread_attr_t *attr); 线程分离属性 int pthread_attr_getdetachstate(const pthread_attr_t *attr, int *detachstate); int pthread_attr_setdetachstate(pthread_attr_t *attr, int de…

6.OAM及系统管理 2014年9月13日 20:40 参考资料: 1.Oracle Applications System Administrator's Guide - Configuration http://download.oracle.com/docs/... acrobat/120sacg.pdf 2.Oracle Applications System Administrator's Guide - Maintenance http://download.oracle.com/d…

[Game Engine Architecture 4] 1.a model of multiple semi-independent flows of control simply matches the problem better than a single flow-of-control design. 2.There are two basic ways in which concurrent threads can communicate: • Message passing. Th…