Re: [SystemSafety] Degraded software performance [diverged from Fault, Failure and Reliability Again]

From: Derek M Jones < >
Date: Wed, 04 Mar 2015 13:40:13 +0000


Drew,

> 2) Increased unreliability of the physical execution environment
> e.g. an increased rate of processor errors
> very specific e.g. dust accumulates on part of the processor card, making
> it run hot and produce calculation errors

The fact that Moore's law is now working against the consumer has not yet gained much traction:
http://shape-of-code.coding-guidelines.com/2013/12/13/unreliable-cpus-and-memory-the-end-result-of-moores-law/

I'm not sure we need to go this far just yet: http://shape-of-code.coding-guidelines.com/2014/05/29/source-code-will-soon-need-to-be-radiation-hardened/

Intrinsic hardware variability is also becoming very noticeable:
http://shape-of-code.coding-guidelines.com/2015/02/24/hardware-variability-may-be-greater-than-algorithmic-improvement/

-- 
Derek M. Jones           Software analysis
tel: +44 (0)1252 520667  blog:shape-of-code.coding-guidelines.com
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Received on Wed Mar 04 2015 - 14:40:18 CET

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