Intel® Advisor User Guide

ID 766448
Date 7/13/2023
Public

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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.

NOTE:
There is a variety of techniques available to minimize data collection, result size, and execution overhead. Check Minimize Analysis Overhead.