User Guide

Contents

GPU Roofline 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
Overhead
5 - 10x
15 - 50x
Goal
Analyze kernels in your application running on GPU
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 (Trip Counts and FLOP with call stacks for CPU and CPU cache simulation)
Result for kernels on GPU
Memory-level GPU Roofline (for CARM, L3, SLM, GTI)
Memory-level GPU Roofline (for CARM, L3, SLM, GTI)
Result for loops/functions on CPU
Cache-aware CPU Roofline for L1 cache
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.
There is a variety of techniques available to minimize data collection, result size, and execution overhead. Check Minimize Analysis Overhead.

Low Accuracy

To run the
GPU Roofline Insights
perspective with the low accuracy:
advisor --collect=roofline --project-dir=./advi -–profile-gpu –- myApplication

Medium Accuracy

To run the
GPU Roofline Insights
perspective with the medium accuracy:
advisor --collect=roofline --project-dir=./advi --profile-gpu –-stacks --enable-data-transfer-analysis -- myApplication
You can view the results in the
Intel Advisor
GUI or generate an interactive HTML report.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.