Subj : Re: Hazard Pointers w/o memory barrier.
To   : comp.programming.threads
From : Joe Seigh
Date : Thu Apr 21 2005 09:01 pm

On Tue, 19 Apr 2005 08:32:13 -0400, Joe Seigh <jseigh_01@xemaps.com> wrote:

> On Z architecture you could use a MVC instruction to store the global
> pointer into the hazard pointer and then load from the hazard pointer
> rather than the usual hazard pointer logic, since the MVC instruction
> isn't interruptable.  I don't know if it's any faster but you could do it.

Actually it's not faster if Z arch has the same memory model as 390 arch
with respect to a store followed by a load from the same location.  It
acts as a memory barrier as loads had to return values from memory.


-- 
Joe Seigh

When you get lemons, you make lemonade.
When you get hardware, you make software.

.