Survey Analysis Purpose and Usage
- Where vectorization, or parallelization with threads, will pay off the most
- If vectorized loops are providing benefit, and if not, why not
- Un-vectorized loops and why they are not vectorized
- Performance problems in general
Survey Analysis Prerequisites
- Choose theSurvey Hotspots Analysistype, then choose the input data set or runtime parameters for your target application. If you want to speed up your target application generally, you can use typical input data. However, if you want to improve performance on specific, slow operations, choose input data to emphasize these slow operations. After you prepare appropriate input data, configure your target application with the chosen data.
- If you plan to run Refinement Reports, set parameters at the same time you set parameters for theSurvey Hotspots AnalysisandSurvey Trip Count Analysistypes. If possible, use theInherit settings from Survey Hotspots Analysis Typecheckbox for other Analysis Types.
Run a Survey Analysis
- In the Visual Studio Solution Explorer, right-click the project, then choose>Intel Advisor [version]Start Survey Analysis.
- Stop analysis and data collection, and retain the already collected data: Click the button.
- Cancel analysis and data collection, and discard the collected data: Click the button.
- Interrupt post-collection data finalization: Click the button.
- If the Survey analysis does not collect sufficient data to produce aSurvey Report, it displays aTarget executed too quickly or does not contain debug symbols message. Consider increasing the target workload or data to run the analysis at least a few seconds; or check whether debug information is specified as a build option; or specify a different target application.
Survey Report Controls
Click the control to save a read-only result snapshot you can view any time.
Intel Advisorstores only the most recent analysis result. Visually comparing one or more snapshots to each other or to the most recent analysis result can be an effective way to judge performance improvement progress.
To open a snapshot, choose
Click the various
Filtercontrols to temporarily limit displayed data based on your criteria.
Click the control to view loops in non-executed code paths for various instruction set architectures (ISAs). Prerequisites:
This toggle control currently combines two features: The
View Configuratorand the
Click the button to search for specific data.
Click the tab to open various
Intel Advisorreports or views.
Right-click a column header to:
Click the toggle to show all available columns in a column set, and resume showing a limited number of preset columns in a column set.
Click the control to:
For example, click the control in the
Compute Performancecolumn set to:
Click the control to show/hide a chart that helps you
visualize actual performance against hardware-imposed performance ceilings, as well as determine the main limiting factor (memory bandwidth or compute capacity), thereby providing an ideal roadmap of potential optimization steps.
Click a data row in the top of the
Survey Reportto display more data specific to that row in the bottom of the
Survey Report. Double-click a loop data row to display a
Survey Sourcewindow. To more easily identify data rows of interest:
Click a checkbox to mark a loop for deeper analysis.
If present, click the image to display code-specific
how-can-I-fix-this-issue?information in the
If present, click the image to view the reason automatic compiler vectorization failed in the
Why No Vectorization?pane.
Click the control to show/hide the