Re: [boost] [spinlock] Spin on volatile read, NUMA fairness?

On 4 Dec 2014 at 3:39, Peter Dimov wrote:

and that it's better to do this:

// atomic_bool f_;

do { while( f_.load( std::memory_order_relaxed ) ) { /* maybe yield */ } } while( f_.exchange( true, std::memory_order_acquire ) );

instead.

I just tested this form instead, and on VS2013 dual core x86 I saw a 45% performance increase. Very nice. Thank you. Niall -- ned Productions Limited Consulting http://www.nedproductions.biz/ http://ie.linkedin.com/in/nialldouglas/