User Guide

Contents

CPU Roofline 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
Overhead
5 - 10x
15 - 50x
Goal
Analyze how well your application uses memory and compute resources of a CPU and determine the main limiting factor (memory bandwidth or compute capacity)
Analyze how well your application uses CPU memory at different cache levels in more details
Analyses
Survey + Characterization (FLOP)
Survey + Characterization (Trip Counts and FLOP with call stacks for all memory levels) + Memory Access Patterns
Result
Cache-aware CPU Roofline for L1 cache
Memory-level CPU Roofline with call stacks (for L1, L2, L3, DRAM)
Memory Access Patterns
You can choose custom accuracy and set a custom perspective flow for your application. For more information, see Customize
CPU / Memory Roofline Insights
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.