User Guide

Contents

Offload Modeling Accuracy Presets

For each perspective, you can choose collection accuracy level. Each accuracy level is a preset of analysis stages and properties with a corresponding accuracy value. The higher accuracy value you choose, the higher runtime overhead is added to the application you run with
Intel® Advisor
.
The following accuracy levels are available:
Accuracy
Runtime Overhead
Analyses and Properties
Results
Low
1.1-10x longer
Survey with enabled in-depth static analysis + Characterization (Trip Counts and FLOP) + Modeling with no assumed dependencies
Basic offload modeling report, which includes:
  • Speed-up and offload recommendations
  • Comparison of measured and estimated performance metrics for selected code regions
  • Code regions not recommended for offloading and why
  • Loops with no proved dependencies assumed parallel
Medium
15-50x longer
Survey with enabled in-depth static analysis+ Characterization (Trip Counts and FLOP, multi-level cache simulation, callstacks, and data transfers) + Modeling with no assumed dependencies
Offload modeling report extended with:
  • Data transfer estimations between host and target device
  • Data transfer recommendations
  • Memory metrics for all cache levels
  • Loops with no proved dependencies assumed parallel
High
50-80x longer
Survey with enabled in-depth static analysis+ Characterization (Trip Counts and FLOP, multi-level cache simulation, callstacks, and full data transfer simulation) + Dependencies with reduction detection + Modeling
Offload modeling report extended with data transfer estimations and recommendations and accurate search for most profitable region 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.