Subj : Re: Lock Free -- where to start
To   : comp.programming.threads
From : Sergey P. Derevyago
Date : Tue Oct 04 2005 03:06 pm

David Schwartz wrote:
>     But worse, in most realistic cases, lock free tremendously *reduce*
> performance. The myth is that locks are expensive. The truth is that
> *contention* is expensive. Lock free algorithms allow code that is
> contending to run in parallel. Locks allow other code to run that probably
> won't contend.
>
	Moreover, some "lock free papers" define the "lock free" term in such a way
that old good spin _locks_ become lock free synchronization primitives!
	Also some authors propose their own "lock free" synchronization primitives
which are no more then flawed spin locks...
--
         With all respect, Sergey.               http://ders.angen.net/
         mailto : ders at skeptik.net

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