Visible to Intel only — GUID: GUID-848E1D9A-E81A-4C2F-97D3-C1CA0E4F2BAA
Visible to Intel only — GUID: GUID-848E1D9A-E81A-4C2F-97D3-C1CA0E4F2BAA
Vectorization Accuracy Levels in Command Line
For each perspective, Intel® Advisor has several levels of collection accuracy. Each accuracy level is a set of analyses and properties that control what data is collected and the level of collection details. The higher accuracy value you choose, the higher runtime overhead is added.
In CLI, each accuracy level corresponds to a set of commands with specific options that you should run one by one to get a desired result.
The following accuracy levels are available:
Comparison / Accuracy Level |
Low |
Medium |
High |
---|---|---|---|
Overhead |
1.1x |
5 - 8x |
10 - 40x |
Goal |
Get basic insights about how well your application is vectorized and how you can improve vectorization efficiency |
Get more insights about how well your application is vectorized and the number of iterations in loops/functions |
Get detailed insights about your application performance, including performance issues and detailed optimization recommendations |
Analyses |
Survey |
Survey + Characterization (Trip Counts) |
Survey + Characterization (Trip Counts, FLOP, Call Stacks) + Memory Access Patterns |
Result |
Basic Survey report |
Survey report extended with trip count data |
Extended Survey report with trip counts and floating-point and integer operations (FLOP and INTOP) Memory Access Patters with memory traffic data and memory usage issues |
You can generate commands for a desired accuracy level from the Intel Advisor GUI. See Generate Command Lines from GUI for details.
Consider the following command examples.
Note: In the commands below, make sure to replace the myApplication with your application executable path and name before executing a command. If your application requires additional command line options, add them after the executable name.
Low Accuracy
To run the Vectorization and Code Insights perspective with the low accuracy:
advisor --collect=survey --project-dir=./advi_results -- ./myApplication
Medium Accuracy
To run the Vectorization and Code Insights perspective with the medium accuracy:
Run the Survey analysis:
advisor --collect=survey --project-dir=./advi_results -- ./myApplication
Run the Trip Counts analysis:
advisor --collect=tripcounts --enable-data-transfer-analysis --project-dir=./advi_results -- ./myApplication
High Accuracy
To run the Vectorization and Code Insights perspective with the high accuracy:
Run the Survey analysis:
advisor --collect=survey --project-dir=./advi_results -- ./myApplication
Run the Trip Counts and FLOP analysis:
advisor --collect=tripcounts --flop --stacks --project-dir=./advi_results -- ./myApplication
Run the Memory Access Pattern analysis for the loops that have the Possible Inefficient Memory Access Pattern issue:
advisor --collect=map --select=has_issue --project-dir=./advi_results -- ./myApplication
You can view the results in the Intel Advisor GUI or generate an interactive HTML report.