linuxaudio.org

On Wed, Jul 13, 2011 at 10:28 AM, Gabriel Beddingfield

 wrote:
>> i don't see why this is needed. its trivial to demonstrate on a piece

quoted text
>> of paper that in a system with weak memory ordering constraints,

>> absence of a memory barrier is incorrect for any code with coupled

>> data values (e.g. a read index and read data). it doesn't matter if

>> this doesn't happen very often. you don't need a simulator of any

>> given CPU+memory model - its just demonstrably incorrect.

>

> "Beware of bugs in the above code -- I've only proved it correct not

> actually run it." - Knuth

funny, but just so that we're clear - I'm not suggesting that a paper

proof of correctness is enough, but I am suggesting that a paper proof

of incorrectness *is* enough.

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