[fpc-devel] volatile variables

Michael Schnell mschnell at lumino.de
Tue Jun 28 17:12:13 CEST 2011

On 06/28/2011 04:38 PM, Andrew Brunner wrote:
> 1.) How can we get the core to not relent and have the code handed off
> to another core until we're finished?
> 2.) How can we get the core to have a synchronised copy of a
> particular variable (aside from CAS)?
I suppose you need to ask these questions the hardware designers at 
Intel or AMD (or read the appropriate docs).

If cache synchronization would not be done (even without forcing it by 
atomic interlocked instructions or memory barriers) regarding the huge 
cache provide with modern CPUs a thread would _never_ see what another 
thread writes into memory. But (unless some kind of atomicness or 
ordering is required) there are no issues on that behalf.


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