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

Subject: Re: [boost] [spinlock] Spin on volatile read, NUMA fairness?
From: Niall Douglas (s_sourceforge_at_[hidden])
Date: 2014-12-04 08:25:09

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

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