Set the focus for modeling CPU cache behavior during Memory Access Patterns analysis.

GUI Equivalent

Project Properties > Analysis Target > Memory Access Patterns Analysis > Advanced > Cache simulation mode

Syntax

--cachesim-mode=<string>

Arguments

<string> is one of the following:

Argument

Description

cache-misses

Model cache misses only.

footprint

Model cache misses and memory footprint of a loop. Calculation: Cache line size x Number of unique cache lines accessed during simulation.

utilization

Model cache misses and cache lines utilization.

Default

utilization

Actions Modified

collect=map --enable cache-simulation

Usage

For memory footprint simulation, the Intel Advisor tracks only a subset of accesses and cache lines, and scales it up to the total size of cache to calculate the final footprint value.

Note

Cache simulation modeling applies to the following analyses:

  • Memory Access Patterns - This basic simulation functionality models accurate memory footprints, miss information, and cache line utilization for a downstream Memory Access Patterns report.

  • Trip Counts and FLOP - This enhanced simulation functionality models multiple levels of cache for a downstream GUI Roofline chart or Roofline interactive HTML report. To enable enhanced simulation functionality in a GUI Roofline chart: Set the ADVIXE-EXPERIMENTAL=int_roofline environment variable.

Tip

Usage can increase analysis overhead.

Example

Run a Memory Access Patterns analysis. Model cache misses for a default cache configuration.

$ advixe-cl collect=map --enable-cache-simulation --cachesim-mode=cache-misses --project-dir=./myAdvisorProj -- ./myApp

Run a Memory Access Patterns analysis. Model cache miss and memory footprint data for 1024-byte cache set size, default cache associativity and cache line size.

$ advixe-cl collect=map --enable-cache-simulation --cachesim-sets=1024 --cachesim-mode=footprint --project-dir=./myAdvisorProj -- ./myApp

See Also

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