Simple RAM benchmark for Linux.

Simple RAM Benchmark

This is a simple RAM benchmark written in C++. It allows checking approximate RAM speed. The code creates a 1 GiB (1024*1024*1024 bytes) buffer, fills it with zeroes, scans the buffer, and measure the time.

Note: This is only experimental code written to check the RAM speed on Linux. There are probably better tools for memory analysis available like memtest86.

Requirements

• Unix/Linux OS (can be easily ported to Windows)
• g++ compiler compatible with OpenMP (for multi-threaded variant)
• at least 1 GB free RAM (for buffer)

Install and run using pip

To execute the benchmark, you only have to meet the requirements and run the below commands:

pip install rambenchmark
rambenchmark

Compile and run manually

If you prefer to compile and execute the code manually, you can do that by running the following commands:

git clone git@github.com:rsusik/rambenchmark.git
cd rambenchmark/rambenchmark
g++ -O3 -std=c++11 -fopenmp -o rambench ./rambench.cpp
./rambench

Tests

The benchmark uses two functions for tests:

1. memset()
2. memchr()

Output

The benchmark produces below example output:

======================================================================
BENCHMARKING RAM WITH MULTI THREADS
(...please wait...)

4 concurrent threads are supported.

----------------------------------------------------------------------
MEMSET TEST

RESULT of filling 1GiB buffer with zeros.
>>> 0.0654 (s) / 16415.2 (MB/s) <<<

                   Details
  #Threads        Time (s)      Speed (MB/s)
         1      0.0654 (s)    16415.2 (MB/s)
         2      0.0663 (s)    16189.3 (MB/s)
         3      0.0708 (s)    15161.6 (MB/s)
         4      0.0750 (s)    14299.5 (MB/s)

----------------------------------------------------------------------
MEMCHR TEST

RESULT of scanning 1GiB buffer.
>>> 0.0776 (s) / 13820.1 (MB/s) <<<

                   Details
  #Threads        Time (s)      Speed (MB/s)
         1      0.1686 (s)     6365.2 (MB/s)
         2      0.0985 (s)    10893.6 (MB/s)
         3      0.0874 (s)    12281.8 (MB/s)
         4      0.0776 (s)    13820.1 (MB/s)

======================================================================