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摘要: http://www.furion.info/649.html 阅读全文
posted @ 2016-06-12 10:30 zengkefu 阅读(127) 评论(0) 推荐(0)
摘要: http://www.lenky.info/archives/category/nix%E6%8A%80%E6%9C%AF/%E5%86%85%E6%A0%B8%E6%8A%80%E6%9C%AF 阅读全文
posted @ 2016-06-12 09:45 zengkefu 阅读(222) 评论(0) 推荐(0)
摘要: kswapd0、kjournald、pdflush、kblocked、migration进程含义 kswapd0、kjournald、pdflush、kblocked、migration进程含义 kswapd0、kjournald、pdflush、kblocked、migration进程含义 1.k 阅读全文
posted @ 2016-06-12 09:38 zengkefu 阅读(1736) 评论(0) 推荐(0)
摘要: 注意:在清空缓存之前使用sync命令同步数据到磁盘 vvm.lowmem_reserve_ratio For some specialised workloads on highmem machines it is dangerous for the kernel to allow process 阅读全文
posted @ 2016-06-11 22:53 zengkefu 阅读(990) 评论(0) 推荐(0)
摘要: NUMA CPU affinity:CPU绑定 (不会交错访问内存,性能提高) numa: numactl numad numdemo numastat numastat:numa_miss 出现大量值出现,使用绑定 CPU调度域概念:可以把进程绑定到CPU上 Group processors in 阅读全文
posted @ 2016-06-11 20:25 zengkefu 阅读(935) 评论(0) 推荐(0)
摘要: http://blog.csdn.net/wudongxu/article/details/8574753 参数位置: /proc/sys/kernel/ 编绎内核时参数 [root@monitor boot]# pwd/boot[root@monitor boot]# vi config-2.6. 阅读全文
posted @ 2016-06-11 15:36 zengkefu 阅读(336) 评论(0) 推荐(0)
摘要: http://blog.csdn.net/wudongxu/article/category/791519 PAE:物理地址扩展:32bit+4=64G 32位操作系统:1G内核+3G用户 缓存:比原始存储设快,但小,因为贵,程序运行局部性 缓存置换算法:LRU MRU 程序运行局部性:空间局部性, 阅读全文
posted @ 2016-06-10 22:29 zengkefu 阅读(665) 评论(0) 推荐(0)
摘要: Mapping virtual addresses(x86) 1.由于线性地址非常广,逐一查找非常慢,才用三级页表,索引查找 2.TLB:Transfer lookaside buffer(存储地址映射关系) 1.cpu >tlb (大页bigpage:提高TLB 命中,也可以提高分配效益) 2.c 阅读全文
posted @ 2016-06-10 17:35 zengkefu 阅读(463) 评论(0) 推荐(0)
摘要: https://www.kernel.org/pub/software/scm/git/ wget https://www.kernel.org/pub/software/scm/git/git-2.8.4.tar.xz https://git-scm.com/downloads/guis 阅读全文
posted @ 2016-06-10 14:15 zengkefu 阅读(133) 评论(0) 推荐(0)
摘要: http://www.iozone.org/[root@monitor bin]# ./iozone -a -s 512m -f /usr/test -y 512 -q 16384 -Rb /root.out -i 1 -i 2 -i 0 Iozone: Performance Test of File I/O Version $Revision:... 阅读全文
posted @ 2016-06-10 09:29 zengkefu 阅读(804) 评论(0) 推荐(0)
摘要: nginx 这个轻量级、高性能的 web server 主要可以干两件事情: 〉直接作为http server(代替apache,对PHP需要FastCGI处理器支持); 〉另外一个功能就是作为反向代理服务器实现负载均衡 http://www.netcraft.com/ 解决 c10k connec 阅读全文
posted @ 2016-06-10 08:01 zengkefu 阅读(278) 评论(0) 推荐(0)
摘要: vi /etc/httpd/conf/httpd.conf 阅读全文
posted @ 2016-06-10 00:08 zengkefu 阅读(452) 评论(0) 推荐(0)
摘要: curl 127.0.0.1 | | | \--ngx_epoll_process_events | | | | \--ngx_time_update | | | | | \--ngx_gmtime | | | |... 阅读全文
posted @ 2016-06-09 12:44 zengkefu 阅读(1585) 评论(0) 推荐(0)
摘要: http://blog.csdn.net/jianqiangchen/article/details/29175285 http://blog.csdn.net/jianqiangchen/article/details/29201415 http://blog.csdn.net/allenlinr 阅读全文
posted @ 2016-06-09 12:20 zengkefu 阅读(720) 评论(0) 推荐(0)
摘要: http://www.ttlsa.com/tools/use-strace-to-track-multiple-processes/ strace是Linux环境下的一款程序调试工具,用来监察一个应用程序所使用的系统调用及它所接收的系统信息。追踪程序运行时的整个生命周期,输出每一个系统调用的名字,参 阅读全文
posted @ 2016-06-09 10:12 zengkefu 阅读(4010) 评论(0) 推荐(0)
摘要: https://github.com/elcritch/etrace 窗口1: 监控窗口,执行监控程序,显示监控结果 [root@monitor example]# pwd /root/etrace-master/example [root@monitor example]# ll total 28 -rwxr-xr-x 1 root root 16687 Jun 9 08:49 cru... 阅读全文
posted @ 2016-06-09 09:12 zengkefu 阅读(1884) 评论(0) 推荐(0)
摘要: http://blog.csdn.net/oujunli/article/details/8138172 http://blog.csdn.net/oujunli/article/details/50575115 http://blog.csdn.net/oujunli/article/detail 阅读全文
posted @ 2016-06-09 08:37 zengkefu 阅读(220) 评论(0) 推荐(0)
摘要: https://github.com/traceglMPL/tracegl TraceGL能够监控Node.js应用或者浏览器JavaScript代码的运行过程和细节。可视化的用户界面也很友好 阅读全文
posted @ 2016-06-09 08:32 zengkefu 阅读(336) 评论(0) 推荐(0)
摘要: (EDIT: per the first answer below the current "trick" seems to be using an Atom processor. But I hope some gdb guru can answer if this is a fundamental limitation, or whether there adding support fo... 阅读全文
posted @ 2016-06-08 23:08 zengkefu 阅读(874) 评论(0) 推荐(0)
摘要: How can we list all the functions being called in an application For any realistically sized application, this list will have thousands of entries, which will probably make it useless. You can find ... 阅读全文
posted @ 2016-06-08 23:05 zengkefu 阅读(6963) 评论(0) 推荐(0)
摘要: Using Uprobes (since Linux 3.5) Assuming you wanted to trace all functions in ~/Desktop/datalog-2.2/datalog when calling it with the parameters -l ~/D 阅读全文
posted @ 2016-06-08 22:50 zengkefu 阅读(684) 评论(0) 推荐(0)
摘要: http://www.lenky.info/archives/2013/02/2202 [root@localhost trace]# readelf -s ./test | gawk ' { if($4 == "FUNC" && $2 != 0) { print "# code for " $NF 阅读全文
posted @ 2016-06-08 22:15 zengkefu 阅读(3775) 评论(0) 推荐(0)
摘要: [root@monitor samples]# opcontrol --statusDaemon paused: pid 4439Session-dir: /var/lib/oprofileSeparate options: nonevmlinux file: noneImage filter: n 阅读全文
posted @ 2016-06-08 20:50 zengkefu 阅读(1696) 评论(0) 推荐(0)
摘要: http://www.cnblogs.com/rocketfan/archive/2009/11/15/1603465.html http://blog.csdn.net/stanjiang2010/article/details/5655143 http://blog.csdn.net/stanj 阅读全文
posted @ 2016-06-08 16:51 zengkefu 阅读(2207) 评论(0) 推荐(0)
摘要: http://blog.itpub.net/15480802/viewspace-753819/ http://blog.itpub.net/15480802/viewspace-753757/ http://blog.itpub.net/15480802/viewspace-753890/ htt 阅读全文
posted @ 2016-06-08 16:42 zengkefu 阅读(1648) 评论(0) 推荐(0)
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