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Data layout + false sharing
How do people avoid false sharing on multicore/smp systems? Well, basically
you should try and keep data private to each thread, but what to do when you
have structures/arrays with shared data?
Say you have a structure that has some shared data, which is frequently
updated by multiple threads. What good methods are there to layout your data
in such a way that avoids false sharing?
Do you simply add some padding, taking into account CPU cache line size? There
are many different CPUs with different cache sizes and different set
associative ways of mapping memory locations to cache lines.
Is there some sort generic, common sense way of data layout, that works across
most processor architectures?
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