static code analysis tools c linux

Blktrace Introduction:Blktrace is a tracking tool for the I/O layer of the Linux kernel, used to collect the details of the disk IO information when the IO is carried over to the block layer (block level, so called Blk Trace), which is the information of some columns such as IO request submission, queue, merge, completion, etc.The maintainer of the Linux kernel block device layer has been developed and is n

Linux performance analysis tool nmon 1. Overview monitoring is an indispensable part in checking system problems or optimizing system performance. The operating system monitoring tool monitors the usage of operating system resources and indirectly reflects the running status of each server program. The analysis based on the running results can help us quickly loc

The LDD and NM described in this article are two useful tools for analyzing programs under Linux. LDD is a tool used to analyze the dynamic libraries that a program needs to rely on when it runs; nm is a tool for viewing the contents of a symbol table in a specified program. Here are some examples of these two tools:1. LDD, look at the following example, using LD

the TIME_WAIT state. When there are too many concurrent requests, there will be a lot of time_wait that can not be disconnected in time, which will consume a lot of port resources and server resources.　　　　　Netstat-an|awk '/tcp/{print $6} ' |sort|uniq-c5 established5 LISTEN2048 time_waitVim/etc/sysctl.conf#开启重用, allowing connections to the TIME_WAIT state to be re-used for new TCP connectionsNet.ipv4.tcp_tw_reuse = 1#开启TCP连接中TIME_WAIT连接的快速回收Net.ipv4.tcp_tw_recycle = 1#控制同时保持TIME_WAIT套接字的最大数量Net.

The source code analysis tool in linux-general Linux technology-Linux programming and kernel information. The following is a detailed description. Programming in linux often involves viewing where some things are defined. It is inconvenient to search through command lines. A

Linux performance monitoring and analysis tool background recently, a pre-developed system performance test is required. The system is deployed on the Linux server cluster. In high concurrency and high load scenarios, you can collect all the information (including CPU, memory, I/O, disk, and network traffic) occupied by each device...

Tcpdump is a basic tool for network protocol analysis. Tshark is the command line version of wireshark (formerly known as ethereal), a well-known open-source network protocol analysis tool. wireshark can decode and analyze thousands of network protocols. Wireshark and tcpdump both use the libpcap library (see the libpcap programming tutorial) for network packet capture. TCPDUMP details Tcpdump is a basic to

Data collection and analysis is essential when Linux is a network server, especially a router or gateway. So, let's take a look at TcpDump, a powerful network data collection and analysis tool in Linux. As the name suggests, TcpDump can completely intercept the "Header" of the packets transmitted in the network for

the command, the tracking process is often in the specified wait time, unable to return the correct required information. Secondly, in the process of analysis, the caller may need to suspend other threads in the process and have some influence on the process being tracked. The second way Advantage: Through kernel support, access to tracked memory, and snapshots, background analysis, rarely affect the pr

[Email protected] ~]# Vim/etc/yum.repos.d/ntop.repo[NTOP]Name=ntop Packagesbaseurl=http://packages.ntop.org/centos-stable/$releasever/$basearch/Enabled=1Gpgcheck=1Gpgkey=http://packages.ntop.org/centos-stable/rpm-gpg-key-deri[Ntop-noarch]Name=ntop Packagesbaseurl=http://packages.ntop.org/centos-stable/$releasever/noarch/Enabled=1Gpgcheck=1Gpgkey=http://packages.ntop.org/centos-stable/rpm-gpg-key-deri2. Install the Yum extension source[Email protected] ~]# RPM-UVH epel-release-6-8.noarch.rpm3, In

In the previous blog (http://blog.csdn.net/raintungli/article/details/7034005) mentioned in the signal forwarding thread, Attach Listener thread is only the operation of the socket file, Does not perform such as stack analysis, or heap analysis, the real worker thread is VM thread. (i) Start VM thread Jint THREADS::CREATE_VM (javavminitargs* args, bool* cantryagain) { ... Create the Vmthread {tracetime

-related system calls -e Trace=file//records only system calls involving file names -e Trace=desc//records only system calls involving file handles There are other, including process,ipc,signal and so on. A classic, through the Strace view a process of all relevant open files of the process, refer to the "Linux strace Command (detailed) txt" sina ebook can download If the development program does not have a powerful tool to accompany, then the develop

represents what AWK looks for in the data, and the action is a series of commands that are executed when a match is found. Curly braces ({}) do not need to always appear in the program, but they are used to group a series of instructions according to a particular pattern. pattern is the regular expression to be represented, surrounded by slashes.Example#输出df第一个字段 [[email protected] ~]# df-ph |awk ' {print $} ' #输出df第一个和第三个字段 [[email protected] ~]# df-ph |awk ' {print $1,$3} ' # Output DF last f

0.00 0.00 0.00 0.00^c Top$Toptop-00:15:40 up 21:56, 1 user, load average:31.09, 29.87, 29.92Tasks:871 Total, 1 running, 868 sleeping, 0 stopped, 2Zombie%CPU (s): 96.8 us, 0.4 sy, 0.0 ni, 2.7 ID, 0.1 wa, 0.0 hi, 0.0 si, 0.0Stkib Mem:25190241+total, 24921688 used, 22698073+free, 60448Bufferskib Swap:0 Total, 0 used, 0 free. 554208cached Mem PID USER PR NI VIRT RES SHR S%CPU%MEM time+COMMAND20248 Root 0 0.227t 0.012t 18748 S 3090 5.2 29,812:58Java4213 Root 0 2722544 64640 44232