利用gprof gprof2dot 和graphviz 图形化定位linux c/c++系统性能瓶颈

1 下载

  下载gprof2dot.py
下载源代码graphviz-2.18.tar.gz

2  环境
[admin@b2bsearch80 bin]$ python -V
Python2.3.4
[admin@b2bsearch80 bin]$ gcc -v
Reading specs from /usr/lib/gcc/i386-redhat-linux/3.4.6/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-java-awt=gtk --host=i386-redhat-linux
Thread model: posix
gcc version 3.4.6 20060404 (Red Hat3.4.6-3)
[admin@b2bsearch80 bin]$ uname -a

Linux b2bsearch802.6.9-42.ELsmp #1 SMP Wed Jul 12 23:27:17 EDT 2006 i686 i686 i386 GNU/Linux

 
3  安装
Chmod 744 gprof2dot.py

Tar -zxvf graphviz-2.18.tar.gz
  ./configure
 make
  su  -
 make install
 
4   编译代码
gcc -pg -g -o uniqueCoreDump uniqueCoreDump.c

 
5  执行代码生成gmon.out

  执行命令产生gmon.out文件
  ./uniqueCoreDump

ll gmon.out
如果gprof ./uniqueCoreDump有：

gmon.out file is missing call-graph data
则表示没有正确的编译选项或者只有一个main函数

6  生成图片
 gprof ./uniqueCoreDump  | ./gprof2dot.py -n0 -e0 | dot -Tpng -o output.png

 

  sz  output.png

note：

 对于后台程序都是daemon加死循环

 1. 如果是daemon程序的话，先去掉daemon

 2. 程序必须正常结束，注册一个signal，exit正常退出

最后来张图，有点大右边的被我去掉了

 

[root@localhost test]# gprof  -C heartBeat | sort -k3,3 -nr
/data/kenthy/dataProcess/heartBeat/heartBeat.cpp:256: (_Z10HandleLoopv:0x804988c) 3391 executions
/data/kenthy/dataProcess/heartBeat/multi_file_processing.c:307: (MfpWaitForFd:0x8049c19) 3390 executions
/data/kenthy/dataProcess/heartBeat/multi_file_processing.c:349: (MfpGetReadyFd:0x8049b20) 3389 executions
/data/kenthy/dataProcess/heartBeat/heartBeat.cpp:210: (_Z17dbUpdateHeartBeatl:0x8049662) 3 executions
/usr/include/c++/4.1.2/iostream:76: (__tcf_0:0x8048392) 1 executions
/usr/include/c++/4.1.2/bits/stl_tree.h:1259: (_ZNSt8_Rb_treeIjSt4pairIKj12stAgent_infoESt10_Select1stIS3_ESt4lessIjESaIS3_EE8_M_eraseEPSt13_Rb_tree_nodeIS3_E:0x804993e) 1 executions
/data/kenthy/dataProcess/heartBeat/srv_framework.c:627: (ConnectToTCPALLSvr:0x804d0ab) 1 executions
/data/kenthy/dataProcess/heartBeat/srv_framework.c:460: (CreateUDPSocket:0x804bde7) 1 executions
/data/kenthy/dataProcess/heartBeat/srv_framework.c:257: (SrvFrameworkInit:0x804c68f) 1 executions
/data/kenthy/dataProcess/heartBeat/srv_framework.c:1159: (SrvFrameworkLoop:0x804d2a6) 1 executions
/data/kenthy/dataProcess/heartBeat/multi_file_processing.c:60: (MfpInit:0x8049f5a) 1 executions
/data/kenthy/dataProcess/heartBeat/multi_file_processing.c:206: (MfpAddFd:0x804a0d0) 1 executions
/data/kenthy/dataProcess/heartBeat/heartBeat.cpp:54: (__tcf_1:0x8048366) 1 executions
/data/kenthy/dataProcess/heartBeat/heartBeat.cpp:400: (_GLOBAL__I_stConfig:0x8048344) 1 executions
/data/kenthy/dataProcess/heartBeat/heartBeat.cpp:399: (_Z41__static_initialization_and_destruction_0ii:0x80482b2) 1 executions
/data/kenthy/dataProcess/heartBeat/heartBeat.cpp:388: (main:0x80495d4) 1 executions
/data/kenthy/dataProcess/heartBeat/heartBeat.cpp:376: (_Z14InitSigHandlerv:0x8049566) 1 executions
/data/kenthy/dataProcess/heartBeat/heartBeat.cpp:282: (_Z4InitiPPc:0x804840c) 1 executions