stream

Stream

Introduction

A benchmark to measure the memory bandwidth of a system.

This is an amateur replication of the original STREAM benchmark.

NOTE: These are not production-level benchmarks and are only for educational purposes. Results are not representative of actual performance.

Build, Run and Plotting Instructions

# Build
$ make install-dep
$ make stream

# Run
$ ./run-stream

# Plot Stream graphs
$ make plot

Prerequisites and Settings

BIOS

NOTE: Make sure to restore the BIOS to defaults before making the following changes.

Required BIOS Settings

These settings directly affect the bandwidth being measured and should be considered required.

• SMT = Disabled
• NPS = NPS4

Benchmark Noise Reduction and Reproducibility BIOS Settings

These settings generally do not affect the bandwidth but may reduce run-to-run variability.

• Determinism = Performance
• Core Performance Boost (CPB) = Disabled
• Global C-State Control (for CPU cores) = Disabled
• DF C-States = Disabled
• DF P-State = P0

OS

• Linux (Ubuntu 24.04.4)

• Software prerequisites: GCC and Make

• Run make install-dep to install software packages required for compilation

• Set the CPU frequency governor to 'performance'

  $ cpupower frequency-info # available options and current option
  $ sudo cpupower frequency-set -g performance

CPU

An AMD Zen 3 CPU was used for the sample measurements.

NOTE: These are not production-level benchmarks and are only for educational purposes. Results are not representative of actual performance.

Learning

Go through the Makefile in this directory to find the learning benchmarks to build. Then use the following commands to run them.

$ make install-dep
$ make openmp-basics
$ ./openmp-basics