Subj : Re: Hazard Pointers w/o memory barrier.
To   : comp.programming.threads
From : Joe Seigh
Date : Tue May 03 2005 11:31 pm

On Tue, 03 May 2005 19:13:33 -0400, Joe Seigh <jseigh_01@xemaps.com> wrote:

> Hmm... signals thrash things up quite a bit.  Things
> slow way down unless I put the polling interval up to
> 300 msec to spread the signaling out a bit.  Then I
> get about 1,286,000 reads/sec/thread for RCU+SMR vs.
> 176,000 reads/sec/thread for RCU with the same polling
> interval.  It's a little over 700 reads/sec/thread for
> mutexes or rwlocks.

Ah wait, I must have been looking at the write rate.  It
gets well over 500,000 reads/sec/thread at the default
poll interval, 50 msec.  That's more reasonable.  Now
to try it on Linux to see how it works there.  Linux
signaling is preemptive I believe.

-- 
Joe Seigh

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

.