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Subject: Quad proc results

Author: Tom Kerrigan

Date: 03:21:49 05/01/04

I got access to a quad proc computer this evening and timed how long it took to
search the BK positions to 10 ply, varying the # of threads. Here's the result.

threads   time(s)   NPS(k)   time             NPS     search efficiency
1         943       206      -                -       100%
2         585       401      1.61x (as fast)  1.94x   82%
3         414       569      2.27x            2.76x   82%
4         365       742      2.58x            3.60x   71%

I was wondering how this compares to other programs. My program uses a simple
implementation of YBW, which I found to perform significantly better than
ABDADA. (The latter seems to perform fine until you turn on null move.)

I recall most algorithms in the ICCA Journal claiming excellent scaling for
4-way, usually over 3x IIRC. So I'm a little disappointed by 2.58x but I wonder
how other people measure speedups. Is it with null move on? Also, the set of
positions makes a huge difference. On 11 of the BK positions I get > 3x but the
overall average is dragged down by a few < 2x positions that take a long time to
search.

-Tom

Re: Quad proc results Gian-Carlo Pascutto 15:05:48 05/02/04
Re: Quad proc results Robert Hyatt 08:07:15 05/01/04
- Re: Quad proc results Robert Hyatt 08:08:57 05/01/04
  - Re: Quad proc results (my results here) Robert Hyatt 12:06:24 05/01/04
    - Re: Quad proc results (my results here) Joachim Rang 12:18:33 05/01/04
      - Re: Quad proc results (my results here) Robert Hyatt 15:10:32 05/01/04
        
        Re: Quad proc results (my results here) Vincent Diepeveen 15:20:09 05/01/04
        
        Re: Quad proc results (my results here) Eugene Nalimov 19:36:35 05/01/04
        
        Re: Quad proc results (my results here) Vincent Diepeveen 05:37:49 05/02/04
        
        Re: Quad proc results (my results here) Robert Hyatt 07:31:59 05/02/04
        
        Re: Quad proc results (my results here) Gian-Carlo Pascutto 14:49:02 05/02/04
        
        Let's talk about fraud. Robert Hyatt 10:12:04 05/02/04
        
        Re: Let's talk about fraud. Gian-Carlo Pascutto 15:23:44 05/02/04
        
        Re: Let's talk about fraud. Robert Hyatt 15:49:38 05/02/04
        
        Re: Let's talk about fraud. Vincent Diepeveen 23:14:53 05/02/04
        
        Re: Let's talk about fraud. Robert Hyatt 07:49:07 05/03/04
        
        Re: Let's talk about fraud. martin fierz 06:20:51 05/03/04
        
        Re: Let's talk about fraud. Frank Phillips 10:22:06 05/03/04
        
        Re: Let's talk about fraud. Robert Hyatt 10:55:17 05/03/04
        
        Re: Let's talk about fraud. Vincent Diepeveen 08:05:25 05/03/04
        
        Re: Let's talk about fraud. Uri Blass 10:35:38 05/03/04
        
        Re: Let's talk about fraud. Vincent Diepeveen 11:18:33 05/03/04
        
        Re: Let's talk about fraud. Uri Blass 12:07:50 05/03/04
        
        Re: Let's talk about fraud. Mridul Muralidharan 03:06:34 05/04/04
        
        Re: Let's talk about fraud. Uri Blass 03:24:28 05/04/04
        
        Re: Let's talk about fraud. Vincent Diepeveen 04:25:20 05/04/04
        
        Re: Let's talk about fraud. martin fierz 15:38:40 05/04/04
        
        Still waiting on you to stop the "run and hide" stuff. Robert Hyatt 08:49:49 05/04/04
        
        YOU DENY YOUR OWN ARTICLES Vincent Diepeveen 04:53:14 05/05/04
        
        Re: YOU DENY YOUR OWN ARTICLES James Swafford 09:42:24 05/05/04
        
        Re: YOU DENY YOUR OWN ARTICLES Vincent Diepeveen 13:32:13 05/05/04
        
        Re: YOU DENY YOUR OWN ARTICLES Robert Hyatt 14:57:09 05/05/04
        
        Re: YOU DENY YOUR OWN ARTICLES James Swafford 14:42:29 05/05/04
        
        Re: YOU DENY YOUR OWN ARTICLES enrico carrisco 02:18:30 05/07/04
        
        Re: YOU DENY YOUR OWN ARTICLES Peter Skinner 14:46:41 05/05/04
        
        Re: YOU DENY YOUR OWN ARTICLES Robert Hyatt 10:07:18 05/05/04
        
        Re: YOU DENY YOUR OWN ARTICLES Robert Hyatt 08:27:04 05/05/04
        
        Re: YOU DENY YOUR OWN ARTICLES Ed Schröder 07:13:14 05/05/04
        
        Re: YOU DENY YOUR OWN ARTICLES Robert Hyatt 09:12:40 05/05/04
        
        Re: YOU DENY YOUR OWN ARTICLES Ed Schröder 12:36:06 05/05/04
        
        Re: YOU DENY YOUR OWN ARTICLES Robert Hyatt 12:53:46 05/05/04
        
        Re: YOU DENY YOUR OWN ARTICLES Dave Gomboc 08:23:25 05/05/04
        
        Re: YOU DENY YOUR OWN ARTICLES Ed Schröder 08:44:18 05/05/04
        
        Re: YOU DENY YOUR OWN ARTICLES Dave Gomboc 15:55:52 05/05/04
        
        Re: YOU DENY YOUR OWN ARTICLES Ed Schröder 00:01:22 05/06/04
        
        Re: YOU DENY YOUR OWN ARTICLES Dan Ellwein 06:59:20 05/06/04
        
        Re: YOU DENY YOUR OWN ARTICLES Robert Hyatt 08:28:37 05/05/04
        
        Re: Still waiting on you to stop the "run and hide" stuff. Omid David Tabibi 01:39:16 05/05/04
        
        Re: Still waiting on you to stop the "run and hide" stuff. Robert Hyatt 08:29:39 05/05/04
        
        Re: Let's talk about fraud. Mridul Muralidharan 03:52:00 05/04/04
        
        Re: Let's talk about fraud. Uri Blass 04:44:22 05/04/04
        
        Re: Let's talk about fraud. Robert Hyatt 13:41:46 05/04/04
        
        Re: Let's talk about fraud. Robert Hyatt 10:53:23 05/03/04
        
        Re: Let's talk about fraud. Frank Phillips 10:58:12 05/03/04
        
        Re: Let's talk about fraud. Robert Hyatt 08:58:21 05/03/04
        
        Re: Let's talk about fraud. Anthony Cozzie 08:04:59 05/03/04
        
        Re: Let's talk about fraud. martin fierz 15:51:58 05/03/04
        
        Re: Let's talk about fraud. Gian-Carlo Pascutto 08:51:24 05/03/04
        
        Re: Let's talk about fraud. martin fierz 16:04:34 05/03/04
        
        Re: Let's talk about fraud. Robert Hyatt 19:50:58 05/03/04
        
        Re: Let's talk about fraud. martin fierz 04:11:15 05/04/04
        
        Re: Let's talk about fraud. Robert Hyatt 08:42:19 05/04/04
        
        Re: Let's talk about fraud. Rolf Tueschen 04:32:01 05/04/04
        
        Re: Let's talk about fraud. martin fierz 07:49:42 05/04/04
        
        Re: Let's talk about fraud. Rolf Tueschen 13:30:58 05/04/04
        
        Re: Let's talk about fraud. martin fierz 15:27:41 05/04/04
        
        Re: Let's talk about fraud. Rolf Tueschen 15:33:46 05/04/04
        
        Re: Let's talk about fraud. Robert Hyatt 10:44:21 05/04/04
        
        Re: Let's talk about fraud. martin fierz 15:21:07 05/04/04
        
        Re: Let's talk about fraud. Robert Hyatt 18:06:30 05/04/04
        
        Re: Let's talk about fraud. martin fierz 01:44:19 05/05/04
        
        Re: Let's talk about fraud. Robert Hyatt 08:35:34 05/05/04
        
        A more meaningful test? Matthew Hull 07:25:23 05/05/04
        
        Re: A more meaningful test? Robert Hyatt 08:37:50 05/05/04
        
        Re: A more meaningful test? Matthew Hull 09:12:59 05/05/04
        
        Re: A more meaningful test? Robert Hyatt 09:21:31 05/05/04
        
        Re: A more meaningful test? Matthew Hull 09:25:36 05/05/04
        
        Re: A more meaningful test? Robert Hyatt 10:02:26 05/05/04
        
        Re: A more meaningful test? Matthew Hull 07:29:48 05/05/04
        
        Re: A more meaningful test? Rolf Tueschen 07:41:38 05/05/04
        
        Re: A more meaningful test? Matthew Hull 08:02:08 05/05/04
        
        Re: A more meaningful test? martin fierz 03:03:21 05/06/04
        
        Re: A more meaningful test? Robert Hyatt 09:08:38 05/06/04
        
        Re: Let's talk about fraud. Basics Rolf Tueschen 02:00:59 05/05/04
        
        Re: Let's talk about fraud. Anthony Cozzie 09:04:49 05/03/04
        
        Re: Let's talk about fraud. Gian-Carlo Pascutto 09:19:36 05/03/04
        
        Re: Let's talk about fraud. Robert Hyatt 10:00:12 05/03/04
        
        Re: Let's talk about fraud. Anthony Cozzie 09:34:22 05/03/04
        
        Re: Let's talk about fraud. Rolf Tueschen 09:27:52 05/03/04
        
        Re: Let's talk about fraud. Robert Hyatt 09:06:35 05/03/04
        
        Re: Let's talk about fraud. Robert Hyatt 07:49:48 05/03/04
        
        Re: Let's talk about fraud. Rolf Tueschen 06:34:39 05/03/04
        
        Re: Let's talk about fraud. Gian-Carlo Pascutto 16:36:13 05/02/04
        
        Re: Let's talk about fraud. Robert Hyatt 18:03:06 05/02/04
        
        Re: Let's talk about fraud. Sune Fischer 07:19:46 05/03/04
        
        Re: Let's talk about fraud. Robert Hyatt 07:53:19 05/03/04
        
        Re: Let's talk about fraud. Vincent Diepeveen 08:13:11 05/03/04
        
        Re: Let's talk about fraud. Sune Fischer 10:03:16 05/03/04
        
        Re: Let's talk about fraud. Vincent Diepeveen 11:10:34 05/03/04
        
        Re: Let's talk about fraud. Robert Hyatt 12:17:15 05/03/04
        
        Re: Let's talk about fraud. Vincent Diepeveen 14:23:43 05/05/04
        
        Re: Let's talk about fraud. Robert Hyatt 15:03:39 05/05/04
        
        24 hours + and no response. Robert Hyatt 13:43:22 05/04/04
        
        Re: Let's talk about fraud. Robert Hyatt 10:31:14 05/03/04
        
        Re: Let's talk about fraud. Robert Hyatt 08:37:44 05/03/04
        
        Re: Let's talk about fraud. Uri Blass 10:51:18 05/03/04
        
        Re: Let's talk about fraud. Robert Hyatt 10:59:57 05/03/04
        
        Re: Let's talk about fraud. Gian-Carlo Pascutto 22:50:44 05/02/04
        
        Re: Let's talk about fraud. Robert Hyatt 07:59:09 05/03/04
        
        Re: Let's talk about fraud. Gian-Carlo Pascutto 09:03:48 05/03/04
        
        Re: Let's talk about fraud. Robert Hyatt 09:12:21 05/03/04
        
        Re: Let's talk about fraud. Gian-Carlo Pascutto 09:29:37 05/03/04
        
        Re: Let's talk about fraud. Robert Hyatt 09:53:45 05/03/04
        
        Re: Let's talk about fraud. Gian-Carlo Pascutto 10:08:51 05/03/04
        
        Re: Let's talk about fraud. Robert Hyatt 10:33:34 05/03/04
        
        Re: Let's talk about fraud. Gian-Carlo Pascutto 10:53:35 05/03/04
        
        Re: Let's talk about fraud. Robert Hyatt 11:02:50 05/03/04
        
        Re: Let's talk about fraud. Gian-Carlo Pascutto 11:19:40 05/03/04
        
        Re: Let's talk about fraud. Robert Hyatt 10:45:22 05/04/04
        
        Re: Let's talk about fraud. (more) Robert Hyatt 10:50:06 05/04/04
        
        Re: Let's talk about fraud. Rolf Tueschen 09:37:51 05/03/04
        
        Re: Let's talk about fraud. Rolf Tueschen 00:47:41 05/03/04
        
        Re: Let's talk about fraud. Vincent Diepeveen 08:14:59 05/03/04
        
        Re: Let's talk about fraud. Rolf Tueschen 09:09:50 05/03/04
        
        Re: Let's talk about fraud. Robert Hyatt 09:14:00 05/03/04
        
        Re: Let's talk about fraud. Rolf Tueschen 09:24:48 05/03/04
        
        Re: Let's talk about fraud. Robert Hyatt 09:54:44 05/03/04
        
        Re: Let's talk about fraud. Robert Hyatt 09:01:27 05/03/04
        
        Re: Let's talk about fraud. Rolf Tueschen 18:44:05 05/02/04
        
        Re: Quad proc results (my results here) Robert Hyatt 21:04:49 05/01/04
        
        Re: Quad proc results (my results here) Djordje Vidanovic 07:31:00 05/02/04
        
        Re: Quad proc results (my results here) Robert Hyatt 07:40:24 05/02/04
        
        Re: Quad proc results (my results here) Vincent Diepeveen 08:26:57 05/02/04
        
        Re: Quad proc results (my results here) Robert Hyatt 08:41:04 05/02/04
        
        Re: Quad proc results (my results here) Robert Hyatt 21:05:59 05/01/04
        
        Re: Quad proc results (my results here) Robert Hyatt 15:26:38 05/01/04
Re: Quad proc results Jonas Bylund 03:34:00 05/01/04
- Re: Quad proc results Tom Kerrigan 03:36:21 05/01/04
  - Re: Quad proc results Mridul Muralidharan 06:54:05 05/01/04

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