Fri, 09 Jan 2009 17:08:00 GMT欢迎大家指正其中的错误http://blog.csdn.net/DentistryDoctor/http://blog.csdn.net/DentistryDoctor/archive/2009/01/09/3741866.aspxhttp://blog.csdn.net/DentistryDoctor/comments/3741866.aspx0http://blog.csdn.net/DentistryDoctor/comments/commentRss/3741866.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=3741866<P>最近对一个系统作了些优化, 发现关于高并发系统的性能影响最大的几点, 写出来与大家分享一下:</P><br /><P>1.Lock</P><br /><P>2.Context Switch</P><br /><P>3.Memory Allocation</P><br /><P>4.Data Copies</P><br /><P>&nbsp;</P><br /><P>1.Lock</P><br /><P>频繁的加锁/解锁对系统的性能可想而已，本来多个CPU(核心)跑得十分欢快, 结果因为锁，而导致CPU不得得停停等等, 效率能高吗？即便不需要等待, 进程内用临界区来同步, 同步的开销也是不小的, 一次EnterCritialSection和一次LeaveCriticalSection比一百次++开销肯定要大吧？</P><br /><P>2.Context Switch</P><br /><P>Context Switch的开销很多时间并不那么直观, 但如果一个线程的Context Switch一秒钟数以万计的话，用Process Explorer看一下系统的内核时间消耗就明白了。很<img src ="http://blog.csdn.net/DentistryDoctor/aggbug/3741866.aspx" width = "1" height = "1" />Sat, 10 Jan 2009 01:08:00 +0800DentistryDoctorhttp://blog.csdn.net/DentistryDoctor/archive/2009/01/09/3741866.aspx#Feedbackhttp://blog.csdn.net/DentistryDoctor/archive/2009/01/09/3741866.aspxDentistryDoctorhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/15/1653568.aspxhttp://blog.csdn.net/DentistryDoctor/comments/1653568.aspx0http://blog.csdn.net/DentistryDoctor/comments/commentRss/1653568.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=1653568通过ACM编码后写WAVE文件时，可以直接写文件头，再写具体的数据。但对于不同的格式，编码方式等，直接写文件的话很容易出错的。这儿给出一个简单的写WAVE文件的类。可以用于通过ACM编码录音的应用。<img src ="http://blog.csdn.net/DentistryDoctor/aggbug/1653568.aspx" width = "1" height = "1" />Fri, 15 Jun 2007 21:35:00 +0800DentistryDoctorhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/15/1653568.aspx#Feedbackhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/15/1653568.aspxDentistryDoctorhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/12/1648905.aspxhttp://blog.csdn.net/DentistryDoctor/comments/1648905.aspx0http://blog.csdn.net/DentistryDoctor/comments/commentRss/1648905.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=1648905Singleton无疑是设计模式中最简单的一个了，本文就在此Show一下最简单的实现<img src ="http://blog.csdn.net/DentistryDoctor/aggbug/1648905.aspx" width = "1" height = "1" />Tue, 12 Jun 2007 21:06:00 +0800DentistryDoctorhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/12/1648905.aspx#Feedbackhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/12/1648905.aspxDentistryDoctorhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/11/1647847.aspxhttp://blog.csdn.net/DentistryDoctor/comments/1647847.aspx0http://blog.csdn.net/DentistryDoctor/comments/commentRss/1647847.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=1647847WTL 8.0 Final 发布了<img src ="http://blog.csdn.net/DentistryDoctor/aggbug/1647847.aspx" width = "1" height = "1" />Tue, 12 Jun 2007 00:10:00 +0800DentistryDoctorhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/11/1647847.aspx#Feedbackhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/11/1647847.aspxDentistryDoctorhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/11/1647762.aspxhttp://blog.csdn.net/DentistryDoctor/comments/1647762.aspx0http://blog.csdn.net/DentistryDoctor/comments/commentRss/1647762.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=1647762用了一段时间的Vista, 除了让人觉得极度的不适以外，没有什么其它感觉。或许需要再一段时间了。<img src ="http://blog.csdn.net/DentistryDoctor/aggbug/1647762.aspx" width = "1" height = "1" />Mon, 11 Jun 2007 21:59:00 +0800DentistryDoctorhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/11/1647762.aspx#Feedbackhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/11/1647762.aspxDentistryDoctorhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/09/1645951.aspxhttp://blog.csdn.net/DentistryDoctor/comments/1645951.aspx0http://blog.csdn.net/DentistryDoctor/comments/commentRss/1645951.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=1645951简单描述了UDP中基于反馈的速度控制算法<img src ="http://blog.csdn.net/DentistryDoctor/aggbug/1645951.aspx" width = "1" height = "1" />Sun, 10 Jun 2007 05:15:00 +0800DentistryDoctorhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/09/1645951.aspx#Feedbackhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/09/1645951.aspxDentistryDoctorhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/09/1645930.aspxhttp://blog.csdn.net/DentistryDoctor/comments/1645930.aspx1http://blog.csdn.net/DentistryDoctor/comments/commentRss/1645930.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=1645930缓冲时间 自适应<img src ="http://blog.csdn.net/DentistryDoctor/aggbug/1645930.aspx" width = "1" height = "1" />Sun, 10 Jun 2007 05:00:00 +0800DentistryDoctorhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/09/1645930.aspx#Feedbackhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/09/1645930.aspxDentistryDoctorhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/09/1645801.aspxhttp://blog.csdn.net/DentistryDoctor/comments/1645801.aspx0http://blog.csdn.net/DentistryDoctor/comments/commentRss/1645801.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=1645801给线程命名或取得当前线程的名称<img src ="http://blog.csdn.net/DentistryDoctor/aggbug/1645801.aspx" width = "1" height = "1" />Sun, 10 Jun 2007 03:37:00 +0800DentistryDoctorhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/09/1645801.aspx#Feedbackhttp://blog.csdn.net/DentistryDoctor/archive/2007/06/09/1645801.aspxDentistryDoctorhttp://blog.csdn.net/DentistryDoctor/archive/2006/09/04/1175519.aspxhttp://blog.csdn.net/DentistryDoctor/comments/1175519.aspx1http://blog.csdn.net/DentistryDoctor/comments/commentRss/1175519.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=1175519comsuppw.lib vs comsupp.lib<img src ="http://blog.csdn.net/DentistryDoctor/aggbug/1175519.aspx" width = "1" height = "1" />Mon, 04 Sep 2006 21:54:00 +0800DentistryDoctorhttp://blog.csdn.net/DentistryDoctor/archive/2006/09/04/1175519.aspx#Feedbackhttp://blog.csdn.net/DentistryDoctor/archive/2006/09/04/1175519.aspxDentistryDoctorhttp://blog.csdn.net/DentistryDoctor/archive/2006/09/04/1175497.aspxhttp://blog.csdn.net/DentistryDoctor/comments/1175497.aspx0http://blog.csdn.net/DentistryDoctor/comments/commentRss/1175497.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=1175497Child CPropertySheet<img src ="http://blog.csdn.net/DentistryDoctor/aggbug/1175497.aspx" width = "1" height = "1" />Mon, 04 Sep 2006 21:46:00 +0800DentistryDoctorhttp://blog.csdn.net/DentistryDoctor/archive/2006/09/04/1175497.aspx#Feedbackhttp://blog.csdn.net/DentistryDoctor/archive/2006/09/04/1175497.aspxDentistryDoctor