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 CPU/Memory stress tests create hard crash. 
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Joined: Tue Feb 03, 2015 2:42 am
Posts: 7
Post CPU/Memory stress tests create hard crash.
Does anyone have any suggestions about how to test the CPU and Memory on these systems to see if they are broken in anyway?

Reason why I'm asking is I've noticed issues when trying to build and package software and it seems to do with high load on the system.

For example, download the default cl-installer_utilite-2 image and decompress it. Then install pbzip2 (apt-get -y install pbzip2) and try to run that on the uncompressed image. I can hard crash my utilite every time I try that.

Thoughts?


Thu Feb 12, 2015 11:08 pm
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Joined: Tue Jul 16, 2013 5:53 pm
Posts: 183
Location: Austria Korneuburg
Post Re: CPU/Memory stress tests create hard crash.
Hello,

What about this ?
$sudo apt-get install cpuburn
$burnCortexA9 & burnCortexA9 & burnCortexA9 & burnCortexA9 # run once per core

That should stress your device pretty good.

$man cpuburn

cpuburn(1)

NAME
cpuburn, burnCortexA8, burnCortexA9 - a collection of programs to put
heavy load on CPU

SYNOPSIS
burnCortexA8
burnCortexA9

DESCRIPTION
These programs are designed to load ARM Cortex CPUs as heavily as pos‐
sible for the purposes of system testing ("burn in"). They have been
optimized for different processors. FPU and ALU instructions are coded
in an assembler endless loop. They do not test every instruction. The
goal has been to maximize heat production from the CPU, putting stress
on the CPU itself, cooling system, motherboard (especially voltage reg‐
ulators) and power supply. The programs produce no output, but signal
hardware errors by a return code or (more likely) your machine locking
up.


Fri Feb 13, 2015 4:53 pm
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Joined: Mon Jan 09, 2012 3:16 am
Posts: 351
Post Re: CPU/Memory stress tests create hard crash.
In order to stress the CPU you might also try the Mandelbulber Fractal Generator. My experience is that if you select a complex fractal for rendering and then zoom in several times. you can load all cores of the CPU to 100% for an extended amount of time - many minutes to an hour or more. I use this method to evaluate the system's thermal performance.

Regardless of the method you use to stress test your system, it is a good idea to monitor CPU temperature during the process. For continuous temp monitoring, I recommend Peba's temp app which can be found here:

viewtopic.php?f=68&t=1543&p=5602&hilit=cpu+temp#p5602

The maximum I have ever seen is 70 Deg. C.


Update

I would suggest you follow Peba's recommendation and use CPUBurn. It loads the system just as hard as Mandelbulber and gives you the flexibility of loading 1,2,3, or 4 cores. The only issue I encountered was killing the process. A Ctrl-C only seems to unload 1 core.

Again, pay close attention to the CPU temperature during testing.


Sat Feb 14, 2015 3:12 am
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