<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[pointfish的专栏]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/pointfish</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; pointfish]]></copyright><item><title><![CDATA[Installing Arch Linux and Win8 together on motherboard Z97A]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/41149517</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/41149517</guid><author>pointfish</author><pubDate>Sat, 15 Nov 2014 20:23:24 +0800</pubDate><description><![CDATA[首先进入BIOS。]]></description><category></category></item><item><title><![CDATA[Android 筆記-Linux Kernel SMP (Symmetric Multi-Processors) 開機流程解析 Part(4) Linux 多核心啟動流程-kthreadd 與相關的]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/7832985</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/7832985</guid><author>pointfish</author><pubDate>Sun, 05 Aug 2012 20:34:23 +0800</pubDate><description><![CDATA[Android 筆記-LinuxKernel
 SMP (Symmetric Multi-Processors) 開機流程解析 Part(4)Linux 多核心啟動流程-kthreadd與相關的核心模組





by  loda
hlchou@mail2000.com.tw
Loda's Blog
App BizOrz

kthread第一次出現在LinuxKernel中]]></description><category></category></item><item><title><![CDATA[Android筆記-Linux Kernel Ftrace (Function Trace)解析(非常强悍的性能分析方法)]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/7832744</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/7832744</guid><author>pointfish</author><pubDate>Sun, 05 Aug 2012 18:57:11 +0800</pubDate><description><![CDATA[http://www.cnblogs.com/leaven/archive/2011/12/22/2298352.html


Android筆記-Linux Kernel Ftrace (Function Trace)解析

hlchou@mail2000.com.tw

by loda

在軟體開發時,通常都會面臨到系統效能調教的需求,我們希望知道哪些區塊的程式碼或函式被執行]]></description><category></category></item><item><title><![CDATA[关于kworker]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/7832727</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/7832727</guid><author>pointfish</author><pubDate>Sun, 05 Aug 2012 18:55:48 +0800</pubDate><description><![CDATA[1    请问什么所
 kworker 进程


 清理旧版本的软件缓存:  sudo apt-get autoclean




这个进程是干什么的？ 
我的机器刚装11.04 没次卡的时候 top一下就发现 kworker 这个进程占用CPU很大，基本上都能到75%左右



you
 may try to disable all power saving con]]></description><category></category></item><item><title><![CDATA[软件开发项目规划时，SA、SD与SE的区别与重要性]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/7654215</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/7654215</guid><author>pointfish</author><pubDate>Mon, 11 Jun 2012 22:15:28 +0800</pubDate><description><![CDATA[软件开发项目规划时，SA、SD与SE的区别与重要性
——转自 http://yangmeiwen.blog.163.com/blog/static/493040920098293210544/

标题 软件开发项目规划时，SA、SD与SE的区别与重要性 主题分类 系统与程序设计 原文章出处 知识工作者 
做软件开发项目规划时, 常会碰到助理问我一个问题, SA,SD和SE的差别在那里 ?]]></description><category></category></item><item><title><![CDATA[Davinci encode分析（DM355)]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/7600920</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/7600920</guid><author>pointfish</author><pubDate>Fri, 25 May 2012 10:18:05 +0800</pubDate><description><![CDATA[对视频和音频进行编码
音频算法是G.711
视频算法是mpeg4和H.264
这些算法符合xDM界面。
6个线程：控制线程、视频线程、显示线程、写线程、语音线程、采集线程。
主线程—--->视频线程video thread、语音线程Speech Thread、采集线程、写线程
          视频线程-->显示线程Display Thread、写线程Write Thread
主线]]></description><category></category></item><item><title><![CDATA[inux top命令详解]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/7586140</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/7586140</guid><author>pointfish</author><pubDate>Mon, 21 May 2012 09:36:08 +0800</pubDate><description><![CDATA[top命令是Linux下常用的性能分析工具，能够实时显示系统中各个进程的资源使用情况。
top – 00:01:51 up 2:43, 1 user, load average: 0.00, 0.00, 0.00
Tasks: 69 total, 1 running, 68 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.2%us, 0.7%sy, 0.1%n]]></description><category></category></item><item><title><![CDATA[Linux下获得CPU利用率和内存使用情况(C实现)]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/7586042</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/7586042</guid><author>pointfish</author><pubDate>Mon, 21 May 2012 09:07:16 +0800</pubDate><description><![CDATA[在Linux中如果要监视一个进程的运行情况，如查看它的CPU使用效率和内存使用情况，就需要从系统的 /proc目录的读取一些系统信息。然后分析得到结果，特别是在嵌入式中的应用程序这个功能就很重要。本文中的代码是从top命令的源代码分析中获得，并 做了部分修改，在FC6+GCC4.1调试通过。从这个工程中我也获得一些感悟。
1. Linux系统很优雅，如果在Windows中做这个功能就需要调用Ac]]></description><category></category></item><item><title><![CDATA[DM365的UBL源码分析（转）]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/7567895</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/7567895</guid><author>pointfish</author><pubDate>Tue, 15 May 2012 11:11:43 +0800</pubDate><description><![CDATA[DM365是的启动方式有两种，通过BOOTSEL[2:0]引脚决定。当其为001时，直接从AEMIF上启动，比如NOR和OneNAND。除此之外皆是从RBL启动，顺序为RBL-UBL-UBOOT-KERNEL，比如NAND，串口，SD卡等。RBL会搜寻block1到block24去找UBL，关于RBL启动的详细细节可以参考用户指南关于ARM子系统的那篇文档，很详尽，下面只分析UBL的源码。]]></description><category></category></item><item><title><![CDATA[Linux配置系统日志]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/7563736</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/7563736</guid><author>pointfish</author><pubDate>Mon, 14 May 2012 09:42:46 +0800</pubDate><description><![CDATA[Linux的系统日志守护程序syslogd被激活后，系统遇到的错误信息将被记录到指定的文件中。
激活系统日志守护程序需执行以下任务：
1、创建系统日志文件 以 root 用户身份登录
如果系统日志文件不存在，使用 touch 命令在合适的目录中创建它：
AIX ：touch /var/spool/syslog 
HP-UX ：touch /var/adm/syslog/syslog.lo]]></description><category></category></item><item><title><![CDATA[clock time times]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/7563575</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/7563575</guid><author>pointfish</author><pubDate>Mon, 14 May 2012 09:04:53 +0800</pubDate><description><![CDATA[1. clock，windows下的time一样， 也和 linux下的times一样
2. clock返回clock_t型，其实就是长整型
3. clock和times返回的单位是滴答
4. 滴答根据不同的系统，和不同的标准而不同


    The clock() function returns the processor time since the program start]]></description><category></category></item><item><title><![CDATA[c语言对时间的处理函数和计时的实现]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/7560011</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/7560011</guid><author>pointfish</author><pubDate>Sat, 12 May 2012 12:14:22 +0800</pubDate><description><![CDATA[原帖地址http://blog.youkuaiyun.com/dynamic516/archive/2006/12/02/1427197.aspx

所有代码编译环境：MSVC6.0

1，时间的获取：
通过time()函数来获得日历时间（Calendar Time），其原型为：time_t time(time_t * timer);

#include "stdafx.h"
#include]]></description><category></category></item><item><title><![CDATA[linux 计算时间 time]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/7560005</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/7560005</guid><author>pointfish</author><pubDate>Sat, 12 May 2012 12:09:08 +0800</pubDate><description><![CDATA[做实验室时用 clock() 函数计时出现了负数，技术还有待提高……

转载一下，以备不时之需
http://blog.chinaunix.net/u2/85233/showart_1856092.html
还有篇不错的,学习汇编后可以看看:
http://sites.google.com/a/kingofat.com/windstorm/Article/measure-executio]]></description><category></category></item><item><title><![CDATA[ffmpeg ./configure参数说明]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/7558151</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/7558151</guid><author>pointfish</author><pubDate>Fri, 11 May 2012 17:19:48 +0800</pubDate><description><![CDATA[root@web ffmpeg]# ./configure --help
Usage: configure [options]
Options: [defaults in brackets after descriptions]
Standard options: 基本选项参数
--help                   显示此帮助信息|print this message
--l]]></description><category></category></item><item><title><![CDATA[ffmpeg_configure]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/7558143</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/7558143</guid><author>pointfish</author><pubDate>Fri, 11 May 2012 17:17:53 +0800</pubDate><description><![CDATA[Usage: configure [options]
Options: [defaults in brackets after descriptions] 缺省在描述后的括号里
Standard options:
  --help                   print this message
  --prefix=PREFIX          install in PREFI]]></description><category></category></item><item><title><![CDATA[ffmpeg configure 参数翻译]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/7558140</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/7558140</guid><author>pointfish</author><pubDate>Fri, 11 May 2012 17:17:34 +0800</pubDate><description><![CDATA[已经测试，可以解码H264和RTP， LIB和DLL一共2.7M
./configure --disable-everything --disable-muxers --disable-avdevice --disable-armv5te --disable-armv6 --disable-armv6t2 --disable-armvfp --disable-zlib --disable-bzl]]></description><category></category></item><item><title><![CDATA[/proc/self/status]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/7556022</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/7556022</guid><author>pointfish</author><pubDate>Fri, 11 May 2012 09:25:38 +0800</pubDate><description><![CDATA[[root@localhost ~]# cat /proc/self/status

Name: cat 
State: R (running) 
SleepAVG: 88% 
Tgid: 5783 
Pid: 5783 
PPid: 5742 
TracerPid: 0 
Uid: 0 0 0 0 
Gid: 0 0 0 0 
FDSize: 256 
Groups: 0]]></description><category></category></item><item><title><![CDATA[Linux meminfo 输出详解（zz）]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/7556006</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/7556006</guid><author>pointfish</author><pubDate>Fri, 11 May 2012 09:21:05 +0800</pubDate><description><![CDATA[主要参考内核文档和红帽文档对
> cat /proc/meminfo   读出的内核信息进行解释，
下篇文章会简单对读出该信息的代码进行简单的分析。




MemTotal: 507480 kB
MemFree:         10800 kB
Buffers:         34728 kB
Cached:          98852 kB
SwapCached:]]></description><category></category></item><item><title><![CDATA[Linux上的free命令详解]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/7556004</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/7556004</guid><author>pointfish</author><pubDate>Fri, 11 May 2012 09:19:44 +0800</pubDate><description><![CDATA[解释一下Linux上free命令的输出。
　　下面是free的运行结果，一共有4行。为了方便说明，我们加上了列号。这样可以把free的输出看成一个二维数组FO(Free Output)。例如：

FO[2][1] = 999212FO[3][2] = 305404

                          1          2          3         4]]></description><category></category></item><item><title><![CDATA[ps]]></title><link>https://blog.youkuaiyun.com/pointfish/article/details/7556000</link><guid>https://blog.youkuaiyun.com/pointfish/article/details/7556000</guid><author>pointfish</author><pubDate>Fri, 11 May 2012 09:19:05 +0800</pubDate><description><![CDATA[来源《鸟哥的linux私房菜》

ps：将某个时间点的程序运作情况撷取下来



?





[root@linux
~]# ps aux 
[root@linux
~]# ps -lA 
[root@linux
~]# ps axjf 
参数： 
-A
：所有的 process 均显示出来，与 -e 具有同样的效用； 
-a ：不与 terminal]]></description><category></category></item></channel></rss>