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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<span class="ambiguous-code-point tooltip" data-content="， [U+FF0C] is confusable with , [U+002C]"><span class="char">，</span></span>命令为dot。
    要求是sudoer<span class="ambiguous-code-point tooltip" data-content="， [U+FF0C] is confusable with , [U+002C]"><span class="char">，</span></span>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<span class="ambiguous-code-point tooltip" data-content="， [U+FF0C] is confusable with , [U+002C]"><span class="char">，</span></span>编译dot<span class="ambiguous-code-point tooltip" data-content="： [U+FF1A] is confusable with : [U+003A]"><span class="char">：</span></span>
    cd 3rdparty/gprof &amp;&amp; bash build_gprof2dot.sh
1. srs配置时: 
    ./configure --with-gprof
    脚本会加入编译参数&#34;-pg -lc_p&#34;<span class="ambiguous-code-point tooltip" data-content="， [U+FF0C] is confusable with , [U+002C]"><span class="char">，</span></span>gcc -g -pg -lc_p -c xxx -o xxx.o<span class="ambiguous-code-point tooltip" data-content="， [U+FF0C] is confusable with , [U+002C]"><span class="char">，</span></span>即在configure中打开 Performance=&#34;-pg -lc_p&#34;
    链接时，加入链接选项&#34;-pg&#34;<span class="ambiguous-code-point tooltip" data-content="， [U+FF0C] is confusable with , [U+002C]"><span class="char">，</span></span>否则无法工作<span class="ambiguous-code-point tooltip" data-content="： [U+FF1A] is confusable with : [U+003A]"><span class="char">：</span></span>gcc -pg -o srs xxxx.o<span class="ambiguous-code-point tooltip" data-content="， [U+FF0C] is confusable with , [U+002C]"><span class="char">，</span></span>即在configure中打开 PerformanceLink=&#34;-pg&#34;
2. 编译和启动程序<span class="ambiguous-code-point tooltip" data-content="： [U+FF1A] is confusable with : [U+003A]"><span class="char">：</span></span>make &amp;&amp; ./objs/srs -c conf/srs.conf
    退出程序<span class="ambiguous-code-point tooltip" data-content="， [U+FF0C] is confusable with , [U+002C]"><span class="char">，</span></span>按CTRL+C<span class="ambiguous-code-point tooltip" data-content="， [U+FF0C] is confusable with , [U+002C]"><span class="char">，</span></span>可以看到生成了gmon.out<span class="ambiguous-code-point tooltip" data-content="， [U+FF0C] is confusable with , [U+002C]"><span class="char">，</span></span>这个就是性能的统计数据。
3. gprof生成报表<span class="ambiguous-code-point tooltip" data-content="： [U+FF1A] is confusable with : [U+003A]"><span class="char">：</span></span>
    gprof -b ./objs/srs gmon.out &gt; 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=&#34;winlin&#34;;gprof -b ./objs/srs gmon.out &gt; ~/${file}.log; ./3rdparty/gprof/gprof2dot.py ~/${file}.log | dot -Tpng -o ~/${file}.png

备注：
    其实gprof生成的日志就可以看<span class="ambiguous-code-point tooltip" data-content="， [U+FF0C] is confusable with , [U+002C]"><span class="char">，</span></span>不一定要图形化。
    也就是dot和gprof2dot都不用执行。
    参考<span class="ambiguous-code-point tooltip" data-content="： [U+FF1A] is confusable with : [U+003A]"><span class="char">：</span></span>http://www.cs.utah.edu/dept/old/texinfo/as/gprof.html

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