随笔分类 -  Operating System

Windows上实现精确到毫秒的时钟所遇到的问题与解决方法
摘要：问题1： 15ms 内多次调用 GetSystemTime / GetLocalTime（java 中对应的函数为 System.currentTimeMillis()）， 返回相同的值 解决办法， 使用GetSystemTime 作为baseline， 然后用windows 提供的高精度计时器 QueryPerformanceCounter（java 中相应的函数为 System.nanoTime()） 做计时，精确时钟为baseline + 计时器时间。问题2： QueryPerformanceCounter/QueryPerformanceFrequency 的问题这个问题主要取决与wi 阅读全文
posted @ 2011-06-14 23:57 史莱姆 阅读(3891) 评论(0) 推荐(0)
User and kernel mode switching
摘要：When a transition between user mode and kernel mode is required in an operating system, a context switch is not necessary; a mode transition is not by itself a context switch. However, depending on the operating system, a context switch may also take place at this time. 阅读全文
posted @ 2011-04-26 05:22 史莱姆 阅读(222) 评论(0) 推荐(0)
关于Linux的消息队列
摘要：http://news.ddaaoo.com/Topic/view/id-57255 关于Linux的消息队列: mq_open用于日志记录中，当有新日志添加到队列中，我就mq_send一个消息，日志记录线程就开始记录数据，直至日志队列为空，然后继续等待。但是，遇到了第一个情况：近乎死锁的长时间等待！因为如果设置为阻塞的，mq_send将在发送胜利后之后返回！这很容易导致死锁！试想，如果大量的消息... 阅读全文
posted @ 2010-09-23 11:19 史莱姆 阅读(713) 评论(0) 推荐(0)
Get Hardware ID
摘要：windows platform1) GetSystemFirmwareTable 不支持windows XP 32bit , windows 2000 2) WMI 需要安装WMI Software Developer Kitlinux 阅读全文
posted @ 2010-09-03 22:54 史莱姆 阅读(488) 评论(0) 推荐(0)
Core Instrumentation Events in Windows 7, Part 2
摘要：Dr. Insung Park and Alex BendetovWelcome back for the second part of our two-part article series: Core Instrumentation Events in Windows 7. In the first article, we presented a high-level overview ... 阅读全文
posted @ 2010-09-02 23:10 史莱姆 阅读(398) 评论(0) 推荐(0)
Core OS Events in Windows 7, Part 1
摘要：Dr. Insung Park and Alex BendetoversToday's computer software constantly breaks new grounds. Consumer software applications offer a sophisticated set of features that enable rich new experiences. P... 阅读全文
posted @ 2010-09-02 23:09 史莱姆 阅读(633) 评论(0) 推荐(0)
Event Tracing for Windows, continued
摘要：http://blogs.msdn.com/b/ryanmy/archive/2005/05/27/422772.aspx Uniformity. If you're debugging systemic problems involving multiple components, and all the involved components use ETW, you can have the... 阅读全文
posted @ 2010-09-02 22:44 史莱姆 阅读(348) 评论(0) 推荐(0)
Event Tracing for Windows
摘要：1 create and write the manifest.xml代码Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--<instrumentationManifestxmlns="http://schemas.microsoft.com/wi... 阅读全文
posted @ 2010-08-28 01:34 史莱姆 阅读(992) 评论(0) 推荐(0)
GUI with console window
摘要：1.#ifdef CONSOLE AllocConsole(); SetConsoleTitle(_T("Debug Console")); freopen("conin$", "r+t", stdin); freopen("conout$", "w+t", stdout); freopen("conout$", "w+t", stderr); #endif.................... 阅读全文
posted @ 2010-08-26 00:46 史莱姆 阅读(286) 评论(0) 推荐(0)
event tracing for windows example, windows 7 home
摘要：代码Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--//EventLogging.cpp:Definestheentrypointfortheconsoleapplication.//#include"stdafx.h"#include<wind... 阅读全文
posted @ 2010-07-13 23:19 史莱姆 阅读(391) 评论(0) 推荐(0)
Designing Applications for High Performance - Part III
摘要：http://blogs.technet.com/b/winserverperformance/archive/2008/06/26/designing-applications-for-high-performance-part-iii.aspx25 Jun 2008 7:44 PM Comments 14 Rick Vicik - Architect, Windows Server Perfo... 阅读全文
posted @ 2010-07-13 06:11 史莱姆 阅读(500) 评论(0) 推荐(0)
Designing Applications for High Performance - Part II
摘要：http://blogs.technet.com/b/winserverperformance/archive/2008/05/21/designing-applications-for-high-performance-part-ii.aspx 20 May 2008 9:48 PM Comments 1 Rick Vicik - Architect, Windows Server Perfo... 阅读全文
posted @ 2010-07-13 06:10 史莱姆 阅读(372) 评论(0) 推荐(0)
使用 ETW 改善调试和性能优化
摘要：http://msdn.microsoft.com/zh-cn/magazine/cc163437.aspx事件跟踪 使用 ETW 改善调试和性能优化 Dr. Insung Park andRicky Buch 本文讨论: 了解 ETW 体系结构Windows Vista 中 ETW 的新功能使用事件提供程序 API 进行编程 本文使用了以下技术: Windows Vista 目录 Wind... 阅读全文
posted @ 2010-07-02 01:11 史莱姆 阅读(1848) 评论(0) 推荐(0)
跨平台的timmer
摘要：代码Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--#ifndef_PERF_TIMER_H_#define_PERF_TIMER_H_#ifdef_WIN32#include<windows.h>#else#include<sys/... 阅读全文
posted @ 2010-06-26 04:06 史莱姆 阅读(365) 评论(0) 推荐(0)
只能起一个进程 LINUX
摘要：代码Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--/**main.cpp**Createdon:Feb9,2010*Author:weiyuwang*/#include<signal.h>#include<unistd.h>#... 阅读全文
posted @ 2010-06-26 03:44 史莱姆 阅读(419) 评论(0) 推荐(0)
HOWTO fix -fPIC errors
摘要：http://www.gentoo.org/proj/en/base/amd64/howtos/index.xml?part=1&chap=3Content: The ProblemWhat is PIC?What are "relocations"?Case 1: Broken compilerCase 2: Broken `-fPIC' support checks in config... 阅读全文
posted @ 2010-06-23 02:50 史莱姆 阅读(742) 评论(0) 推荐(0)
console application 截获 ctrl - c
摘要：代码Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--#ifdef_MSC_VERBOOLWINAPIconsole_handler(DWORDcevent){switch(cevent){caseCTRL_C_EVENT:caseCTRL_BREAK_... 阅读全文
posted @ 2010-04-30 00:57 史莱姆 阅读(435) 评论(0) 推荐(0)
跨平台socket select 的bug
摘要：这个bug搞了我两天， 大致就是说select 函数在linux 下 每次调用都会重置timeout参数值， 所以需要在每次调用select 函数之前， 重新设置timeout (window下面不会重置timeout)。-----------------------------------------------------------------------------------------... 阅读全文
posted @ 2010-04-01 23:45 史莱姆 阅读(474) 评论(0) 推荐(0)
create and kill child process on linux
摘要：代码Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--#include<unistd.h>#include<sys/types.h>#include<sys/wait.h>#include<signal.h>... 阅读全文
posted @ 2010-02-12 00:54 史莱姆 阅读(686) 评论(0) 推荐(0)