User Guide

Contents

Offload Modeling Accuracy Presets

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.
The following accuracy levels are available:
Comparison / Accuracy Level
Low
Medium
High
Overhead
5 - 10x
15 - 50x
50 - 80x
Goal
Model performance of an application that is mostly compute bound and does not have dependencies
Model application performance considering memory traffic for all cache and memory levels
Model application performance with all potential limitations for offload candidates
Analyses
Survey + Characterization (Trip Counts and FLOP) + Performance Modeling with no assumed dependencies
Survey + Characterization (Trip Counts and FLOP with cache simulation, callstacks, and light data transfer simulation) + Performance Modeling with no assumed dependencies
Survey + Characterization (Trip Counts and FLOP with cache simulation, callstacks, and medium data transfer simulation) + Dependencies + Performance Modeling with assumed dependencies
Result
Basic Offload Modeling report that shows potential speedup and performance metrics estimated on a target considering memory traffic from execution units to L1 cache only. The result may be inaccurate for memory-bound applications.
Offload Modeling report extended with data transfers estimated between host and device platforms considering memory traffic for all cache and memory levels
Offload Modeling report with detailed data transfer estimations and automated check for loop-carried dependencies for more accurate search for the most profitable regions to offload
You can choose custom accuracy and set a custom perspective flow for your application. For more information, see Customize
Offload Modeling
Perspective
.
There is a variety of techniques available to minimize data collection, result size, and execution overhead. Check Minimize Analysis Overhead.

Product and Performance Information

1

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