SMP: ISR disable/enable vs. mutual exclustion

[Sebastian Huber]

On 2013-08-20 17:56, Gedare Bloom wrote:
> How much space overhead is the ISR lock? I prefer the solution (1) if
> the overhead is not that much.

This is CPU specific.  For a ticket lock you need two unsigned integers, 
e.g. 8 bytes on ARM and PowerPC.  A chain control has 12 bytes without 
the lock.

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Sebastian Huber, embedded brains GmbH

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