GPU621 Team 1

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Revision as of 18:07, 30 November 2016 by Timothy Chun Yan Ngai (talk | contribs) (VTune Tutorial 1: Finding HotSpot)
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What is VTune Amplifier?

Where can you get it?

Getting Started

VTune Tutorial 1: Finding HotSpot

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This example program will be downloaded when you install VTune Amplifier. Following is the directory that contain the sample code from Intel.

[Program Files]\IntelSWTools\VTune Amplifier XE <version>\sample

Open the project using Visual Studio. Then you can run the the VTune Amplifier and click new Analysis. (You need to download Vtune Amplifier to have that tab on Visual Studio)

Tim Hotspt 2.png

This should be the next page you will get. You begin to choose different type of Analysis here. We are going do a Basic Hotpots Analysis.Then click start to start the Analysis.

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The program should run itself after you begin.You will notice that the image is loading from the bottom to the top. After the program finish running, it will take a while for Amplifer to generate report.

Tim Hotspt 4.png

After the program finish running, it will take a while for Amplifer to generate report.

Tim Hotspt 5.png

The first page will shows a summary of the program.The time it took, the top hotspots, CPU usage etc. We will focus looking at the Hotspots table. we notice that the "initialize_2D_buffer" use the most the CPU time. If you look at the code on find_hotspots.cpp you will notice it is actually one function in side that cpp file

Tim Hotspt 7.png

We go to the bootom up tab. it will give you a graph that shows the Hotspots table you got. You can clearly see that "initialize_2D_buffer" use a lot

Tim Hotspt 8.png wfawf

Tim Hotspt 9.png wfawf


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Tim Hotspt 12.png wfawf

VTune Tutorial 2: Identifying False Sharing

VTune Tutorial 3: Disk input Output Analysis

Resources