Subj : Re: Three membar-related questions
To   : comp.programming.threads
From : Ziv Caspi
Date : Sat Feb 05 2005 01:52 am


"Joseph Seigh" <jseigh_01@xemaps.com> wrote in message 
news:opsloqh7m5bs6ffg@grunion...
[...]
> I know stores are in order but I've heard some say the loads are also but
> yes Intel has warned on that and unless you want to write code that 
> queries
> the processor model, you should assume that.  Though there's probably so
> much code that assumes total store order that Intel would be taking a huge
> risk making stores out of order.

While read-after-read and write-after-write are made in order, x86 may 
reverse the order of read-after-write.

See also http://www.microsoft.com/whdc/driver/kernel/MP_issues.mspx.

Ziv Caspi.

.