我是 VTune Amplifier 的新手,我正在尝试使用一个非常基本的应用程序来分析 OpenCV。按照本指南推荐的编译器选项,我通过 CMake 编译了 OpenCV CMAKE_BUILD_TYPE=RelWithDebInfo
,-DWITH_OPENMP=ON
因此包括-O2
和-g
选项并启用了 OpenMP。我的测试 OpenCV 应用程序是用
g++ -I/home/luca/Dropbox/SURFSPM/opencvInstall/include -O3 -g -Wall -c -fmessage-length=0 -MMD -MP -MF"main.d" -MT"main.o" -o "main.o" "../main.cpp"
通过日食。但是,当我尝试分析我的应用程序时,这是收集日志:
Data collection is completed successfully
Sunday, February 05, 2017 AM11:44:53 CET The result file '/home/luca/intel/amplxe/projects/OpenCV/r000hs/r000hs.amplxe' is successfully created and added to the project OpenCV.
Finalization completed with warnings
Sunday, February 05, 2017 AM11:45:01 CET Result finalization has completed with warnings that may affect the representation of the analysis data. Please see details below.
Cannot locate file `[stack]'.
Cannot locate debugging symbols for file `/lib/x86_64-linux-gnu/libgcc_s.so.1'.
Cannot match the module with the symbol file `/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.21': checksum is different. Make sure to specify the correct path to the symbol file in the Binary/Symbol Search list of directories.
Cannot locate debugging symbols for file `/usr/lib/x86_64-linux-gnu/libstdc++.so.6'.
Cannot locate debugging symbols for file `/opt/intel/vtune_amplifier_xe_2017.1.0.486011/lib64/runtime/libittnotify_collector.so'.
Cannot locate debugging symbols for file `/lib64/ld-linux-x86-64.so.2'.
Cannot locate debugging symbols for file `/usr/lib/x86_64-linux-gnu/libpng12.so.0'.
Cannot locate debugging symbols for file `/usr/local/lib/libopencv_xfeatures2d.so.3.1'.
Cannot locate debugging symbols for file `/opt/intel/vtune_amplifier_xe_2017.1.0.486011/lib64/libtpsstool.so'.
Cannot locate debugging symbols for file `/usr/local/lib/libopencv_core.so.3.1'.
Cannot locate debugging symbols for file `/usr/local/lib/libopencv_imgcodecs.so.3.1'.
Cannot locate debugging symbols for file `/usr/local/lib/libopencv_imgproc.so.3.1'.
另外,从下图中可以看出,大部分时间CPU使用率处于空闲状态:
这让我觉得这个警告信息很重要,我做错了什么。