VTune Basic Notes 1

1. VTune文檔：

Getting Started Tutorial：http://software.intel.com/sites/products/documentation/hpc/amplifierxe/en-us/2011Update/lin/start/index.htm

VTune Help Document：http://software.intel.com/sites/products/documentation/hpc/amplifierxe/en-us/2011Update/lin/ug_docs/index.htm

2. Installation Information：

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Installing Amplifier XE Command line interface component... done
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Installing Amplifier XE Sampling driver kit component... done
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Installing Amplifier XE Graphical user interface component... done
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To get started using Intel(R) VTune(TM) Amplifier XE 2011 Update 7: 
  - To set your environment variables: source /opt/intel/vtune_amplifier_xe_2011/amplxe-vars.sh
  - To start the graphical user interface: amplxe-gui
  - To use the command-line interface: amplxe-cl
  - To view a table of getting started documents: /opt/intel/vtune_amplifier_xe_2011/documentation/en/documentation_amplifier.htm

可見，其主要包括三個組件。

3. 命令列運行amplxe-gui

You may run the VTune Amplifier XE (amplxe-gui) from the command line as follows:

> amplxe-gui PATH

where PATH is one of the following:

• Full path to a result file (*.amplxe)

• Full path to a project file (config.amplxeproj)

• Full path to a project directory. If the project file does not exist in the directory, the New Project dialog box opens and prompts you to create a new project in the given directory).

4. 關於效能分析的編譯：

對程式進行效能分析，一般需要：

1. 為系統下載安裝系統庫(system libraries)的debug information。關於如何安裝debug資訊，參考：http://software.intel.com/sites/products/documentation/hpc/amplifierxe/en-us/2011Update/lin/ug_docs/index.htm#olh/common/configuring_symbol_server.html
2. 使用-g選項編譯代碼。
3. 以Release模式編譯目標。
4. 建立一個用於調優的一個基準，用於進行比較效能提升。(一般使用release模式作為基準就可以了)

5. VTune工作流程workflow

(1) Basic Analysis Workflow 調優和最佳化程式，提高效能。

(2) Remote Analysis Workflow 使用VTune命令列介面在遠程機器上採集資料，在本地機器上查看資料。