Re: context switch vs. signal delivery [was: Re: Accelerating user mode linux]

[Jamie Lokier]

Ingo Molnar wrote:
> And threads can do queued events that amortizes context switch
> overhead, while queued signals generate per-event signal delivery, so
> signal delivery costs are not amortized.
> 
> (Not that i advocate SIGIO or helper threads for highperformance IO -
> Ben's aio interface is the fastest and most correct approach.)

Isn't the per-event queued signal cost amortised when using sigwaitinfo()?

-- Jamie