Overclocking and Stability Testing the Raspberry Pi 2 – Part 2: Stability Testing

Stability Testing an Overclocked Raspberry Pi
 

Checking that the system is reliable after applying overclocking

Overclocking is nothing without Stability. Image - www.wallpaper.ge/
Overclocking is nothing without Stability. Image – http://www.wallpaper.ge/

Following on from Part 1 of this post on Overclocking, we turn our attention to stability testing the system; this process is crucial, as simply witnessing the Pi boot to the command shell, or a Graphical User Interface (GUI) isn’t proof that a given combination of overclock settings is stable.

Sometimes an instability will only become apparent after several hours of intensive activity on the system (which is highly likely if using the system for gaming with an installation such as RetroPie).

There are three tools / scripts which I have used in the stability testing processes. For each I will provide instructions on obtaining and installing (or running, as appropriate):

  • MPrime.py
    – Python script to search for prime numbers, which heavily loads the CPU
    – User selectable numeric range to test
    – User selectable number of cores to run upon simultaneously.
  • Memtester
    – Tests the stability of the RAM
    – Natively runs on a single CPU core, but can be run on all cores using multiple remote SSH sessions, or the Screen tool
  • Stability Test Script
    – Reads the entire SD card 10x. Tests RAM and I/O
    – Writes 512 MB test file, 10x.
    – Script can be easily updated to change the number of reads/writes etc.

This post covers the use of mprime. Subsequent posts covers the use of Memtester and the Stability Test Script. Please use the links in the above list to access the relevant information.

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