Intel® Advisor Help
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 |
5 - 10x |
15 - 20x |
20 - 50x |
Goal |
Analyze kernels in your application running on GPU |
Analyze kernels running on GPU and loops/functions running on CPU in more details |
Analyze kernels running on GPU and loops/functions running on CPU in more details |
Analyses |
Survey with GPU profiling + Characterization (FLOP) |
Survey with GPU profiling + Characterization (FLOP, memory object analysis with light data transfer simulation between host and target device memory) + Performance Modeling for a baseline GPU |
Survey with GPU profiling + Characterization (Trip Counts and FLOP with call stacks for CPU, CPU cache simulation, memory object analysis with medium data transfer simulation between host and target device memory) + Performance Modeling for a baseline GPU |
Result for kernels on GPU |
Memory-level GPU Roofline (for CARM, L3, SLM, GTI) with basic set of recommendations for performance optimization |
Memory-level GPU Roofline (for CARM, L3, SLM, GTI) with extended set of recommendations for performance optimization |
Memory-level GPU Roofline (for CARM, L3, SLM, GTI) with extended set of recommendations for performance optimization |
Result for loops/functions on CPU |
Cache-aware CPU Roofline for L1 cache |
Memory-level Roofline with call stacks (for L1, L2, L3, DRAM) |
Memory-level Roofline with call stacks (for L1, L2, L3, DRAM) |
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.
To run the GPU Roofline Insights perspective with the low accuracy:
advisor --collect=roofline --profile-gpu --enable-data-transfer-analysis --project-dir=./advi_results -- ./myApplicationadvisor --collect=roofline --profile-gpu --enable-data-transfer-analysis --track-memory-objects --data-transfer=light --project-dir=./advi_results -- ./myApplicationadvisor --collect=projection --profile-gpu --enforce-baseline-decomposition --model-baseline-gpu --project-dir=./advi_resultsadvisor --collect=roofline --profile-gpu --stacks --enable-cache-simulation --enable-data-transfer-analysis --track-memory-objects --data-transfer=medium --project-dir=./advi_results -- ./myApplicationadvisor --collect=projection --profile-gpu --enforce-baseline-decomposition --model-baseline-gpu --project-dir=./advi_resultsYou can view the results in the Intel Advisor GUI or generate an interactive HTML report.