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PGPROF/en: Difference between revisions
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= Quickstart guide = | = Quickstart guide = | ||
Using PGPROF usually consists of two steps: | Using PGPROF usually consists of two steps: | ||
# Data collection: Run the application with profiling enabled. | # '''Data collection''': Run the application with profiling enabled. | ||
# Analysis: Visualize the data produced in the first step. | # '''Analysis''': Visualize the data produced in the first step. | ||
Both steps can be accomplished in either command-line mode or graphical mode. | Both steps can be accomplished in either command-line mode or graphical mode. | ||
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== Command-line mode == | == Command-line mode == | ||
Data collection: Use PGPROF to run the application and save the performance data in a file. In this example, the application | '''Data collection''': Use PGPROF to run the application and save the performance data in a file. In this example, the application | ||
is <code>a.out</code> and we choose to save the data in <code>a.prof</code>. | is <code>a.out</code> and we choose to save the data in <code>a.prof</code>. | ||
{{Command|pgprof -o a.prof ./a.out}} | {{Command|pgprof -o a.prof ./a.out}} | ||
You can optionally save the data file and analyze it in graphical mode (see below) using ''File | Import''. | You can optionally save the data file and analyze it in graphical mode (see below) using ''File | Import''. | ||
<br>Analysis: To visualize the performance data in command-line mode: | <br>'''Analysis''': To visualize the performance data in command-line mode: | ||
{{Command|pgprof -i a.prof}} | {{Command|pgprof -i a.prof}} | ||
The results are usually divided into several categories, for example: | The results are usually divided into several categories, for example: | ||
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[[File:pgprof2.png|thumbnail|300px|Visualizing performance data (click for a larger image)|left ]] | [[File:pgprof2.png|thumbnail|300px|Visualizing performance data (click for a larger image)|left ]] | ||
The visualization window is comprised of four panes: | |||
* The Timeline: shows all the events ordered by the time they executed | * The Timeline: shows all the events ordered by the time they executed | ||
* '''GPU Details''': shows performance details for the GPU kernels | * '''GPU Details''': shows performance details for the GPU kernels | ||