Re: [boost] Boost.Fiber mini-review September 4-13

Subject: Re: [boost] Boost.Fiber mini-review September 4-13
From: Peter Dimov (lists_at_[hidden])
Date: 2015-09-06 16:12:15

Giovanni Piero Deretta wrote:

> Waiters are waken up in FIFO order (at least under realtime FIFO 
> scheduling), but if the signaling is done outside
the critical section, a late thread might acquire the critical section (and 
consume a resource) after the condition as become true, but before older 
waiters had a chance to acquire it. This might be particularly important 
with realtime systems.

That's typically what one wants for performance though (absent special FIFO 
requirements), as that late thread is running (has a CPU) and has its cache 
hot.