winlin 15d4993cc3 slowdown the cpu usage for srs to calc connections when too many connections. 0.9.180 10 anni fa
..
build_gprof2dot.sh c7a4dd8863 move wiki images to srs.release 10 anni fa
gprof2dot.py 42ad264182 add gprof files and dot files 10 anni fa
graphviz-2.36.0.zip 179e2a2bba use zip format 10 anni fa
readme.txt 15d4993cc3 slowdown the cpu usage for srs to calc connections when too many connections. 0.9.180 10 anni fa

readme.txt

gprof图形化输出工具: gprof2dot.py graphviz-2.18.tar.gz build_gprof2dot.sh

dot:
http://www.graphviz.org/
http://www.graphviz.org/Download_source.php
graphviz-2.18.tar.gz 绘图工具
build_gprof2dot.sh 编译graphviz,命令为dot。
要求是sudoer,需要sudo make install。

gprof2dot.py:
将gprof的日志绘图。

使用方法:
0. 若需要图形化,编译dot:
cd 3rdparty/gprof && bash build_gprof2dot.sh
1. srs配置时:
./configure --with-gprof
脚本会加入编译参数"-pg -lc_p",gcc -g -pg -lc_p -c xxx -o xxx.o,即在configure中打开 Performance="-pg -lc_p"
链接时,加入链接选项"-pg",否则无法工作:gcc -pg -o srs xxxx.o,即在configure中打开 PerformanceLink="-pg"
2. 编译和启动程序:make && ./objs/srs -c conf/srs.conf
退出程序,按CTRL+C,可以看到生成了gmon.out,这个就是性能的统计数据。
3. gprof生成报表:
gprof -b ./objs/srs gmon.out > gprof.srs.log
4. 将报表生成图片:
./3rdparty/gprof/gprof2dot.py gprof.srs.log | dot -Tpng -o ~/winlin.png

缩写语句:
# 生成 ~/winlin.log ~/winlin.png
rm -f gmon.out; ./objs/srs -c conf/srs.conf
# 用户按CTRL+C
file="winlin";gprof -b ./objs/srs gmon.out > ~/${file}.log; ./3rdparty/gprof/gprof2dot.py ~/${file}.log | dot -Tpng -o ~/${file}.png

备注:
其实gprof生成的日志就可以看,不一定要图形化。
也就是dot和gprof2dot都不用执行。
参考:http://www.cs.utah.edu/dept/old/texinfo/as/gprof.html