From: "Lodewijk Vöge" <lvoege@gmail.com>
To: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] STM support in OCaml
Date: Thu, 9 Mar 2006 00:05:04 +0100 [thread overview]
Message-ID: <A77412AA-96DB-456F-AECD-FB0AE2ABD23F@gmail.com> (raw)
In-Reply-To: <Pine.LNX.4.63.0603081555040.9569@localhost.localdomain>
On 8-mrt-2006, at 23:11, Brian Hurt wrote:
> Love to. Wanna buy me the box? :-} Seriously- my code is
> attached, if someone wants to run it on other boxes and post the
> results, feel free. It's GNU-C/x86 specific, as I'm using GNU C's
> inline assembler and the rdtsc instruction to get accurate cycle
> counts.
I don't know if rdtsc is accurate on 64bit, but this is what running
it on a dual opteron 250 running 64bit linux gives:
$ ./lock
Minimum time for a rdtsc instruction (in clocks): 144099185
Minimum time for a mutex lock+unlock + rdtsc (in clocks): 24
multiple runs hover between this and 37 clocks for the mutex, and
more than twice for the rdtsc.
Lodewijk
next prev parent reply other threads:[~2006-03-08 23:05 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-07 16:18 Asfand Yar Qazi
2006-03-07 16:50 ` [Caml-list] " Sebastian Egner
2006-03-07 17:44 ` Michael Hicks
2006-03-08 0:37 ` Asfand Yar Qazi
2006-03-08 5:05 ` Erick Tryzelaar
2006-03-11 19:43 ` Deadlock free locking scheme (was: Re: [Caml-list] STM support in OCaml) David MENTRE
2006-03-07 17:15 ` [Caml-list] STM support in OCaml skaller
2006-03-07 19:05 ` Asfand Yar Qazi
2006-03-08 0:52 ` skaller
2006-03-08 7:08 ` Bardur Arantsson
2006-03-08 10:38 ` [Caml-list] " Asfand Yar Qazi
2006-03-08 19:36 ` William Lovas
2006-03-08 20:45 ` Brian Hurt
2006-03-08 21:14 ` Paul Snively
2006-03-08 22:06 ` skaller
2006-03-08 22:10 ` Gerd Stolpmann
2006-03-08 23:48 ` skaller
2006-03-09 7:45 ` Andrae Muys
2006-03-09 9:18 ` David Brown
2006-03-08 22:11 ` Brian Hurt
2006-03-08 23:05 ` Lodewijk Vöge [this message]
2006-03-09 3:13 ` Brian Hurt
2006-03-08 23:45 ` Robert Roessler
2006-03-09 0:23 ` skaller
2006-03-09 3:19 ` Brian Hurt
2006-03-09 4:32 ` skaller
2006-03-09 10:38 ` John Chu
2006-03-09 16:53 ` Stefan Monnier
2006-03-11 15:26 ` [Caml-list] " Florian Weimer
2006-03-08 10:11 yoann padioleau
2006-03-08 10:41 ` Asfand Yar Qazi
2006-03-08 12:23 ` skaller
2006-03-08 23:02 ` Asfand Yar Qazi
2006-03-09 0:36 ` skaller
2006-03-08 11:32 ` Gerd Stolpmann
2006-03-08 12:04 ` skaller
2006-03-08 19:22 ` Dan Grossman
2006-03-08 22:10 ` skaller
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