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Subject: Re: 3.06 Xeon Test Results

Author: Anthony Cozzie

Date: 18:46:19 04/09/03

Crafty seems to be unique in that it gets a lot from hyperthreading - Fritz does
not, as Charles' benchmarks show.

SMT is not a guaranteed win.   For SMT to accelerate a chess program, the
following inequality must be true:

(1+S)*1.7/2 > 1

=> S >= 17% (approximately: SMP speedup varies a lot over various positions)

In other words, Crafty on a PIV will get 30% from hyperthreading and a positive
speedup, Fritz on a PIV will get 10% from hyperthreading and a relative slowdown
in search (even as NPS go down).

anthony

Re: 3.06 Xeon Test Results Robert Hyatt 20:00:58 04/09/03
- Re: 3.06 Xeon Test Results Anthony Cozzie 21:39:24 04/09/03
  - good post (nt) Tom Kerrigan 17:24:54 04/10/03
  - Re: 3.06 Xeon Test Results Robert Hyatt 08:12:24 04/10/03
    - Re: 3.06 Xeon Test Results Tom Kerrigan 17:17:32 04/10/03
      - Re: 3.06 Xeon Test Results Robert Hyatt 20:14:26 04/10/03
        
        Re: 3.06 Xeon Test Results Tom Kerrigan 00:02:42 04/11/03
        
        Re: 3.06 Xeon Test Results Robert Hyatt 07:56:16 04/11/03
    - Re: 3.06 Xeon Test Results Anthony Cozzie 11:51:11 04/10/03
      - Re: 3.06 Xeon Test Results Robert Hyatt 14:07:29 04/10/03
        
        Re: 3.06 Xeon Test Results Tom Kerrigan 17:21:09 04/10/03
        
        Re: 3.06 Xeon Test Results Robert Hyatt 20:16:46 04/10/03
        
        Re: 3.06 Xeon Test Results Tom Kerrigan 00:06:56 04/11/03
        
        Re: 3.06 Xeon Test Results Robert Hyatt 07:58:29 04/11/03
        
        Here are some actual numbers Tom Kerrigan 13:53:59 04/11/03
        
        Re: Here are some actual numbers Vincent Diepeveen 19:44:09 04/12/03
        
        Re: Here are some actual numbers Tom Kerrigan 20:39:22 04/12/03
        
        Re: Here are some actual numbers Vincent Diepeveen 04:42:28 04/13/03
        
        Re: Here are some actual numbers Robert Hyatt 20:26:35 04/11/03
        
        Re: Here are some actual numbers Tom Kerrigan 20:29:18 04/12/03
        
        Re: Here are some actual numbers Vincent Diepeveen 05:02:34 04/13/03
        
        how i see SMT Vincent Diepeveen 05:14:54 04/13/03
        
        Re: how i see SMT Jeremiah Penery 17:41:32 04/13/03
        
        Re: how i see SMT Vincent Diepeveen 17:48:01 04/13/03
        
        Re: how i see SMT Jeremiah Penery 19:58:48 04/13/03
        
        Re: how i see SMT Tom Kerrigan 12:25:15 04/14/03
        
        Re: how i see SMT Vincent Diepeveen 13:06:57 04/14/03
        
        Re: how i see SMT Tom Kerrigan 13:35:04 04/14/03
        
        Re: how i see SMT Vincent Diepeveen 13:50:03 04/14/03
        
        Re: how i see SMT Tom Kerrigan 15:24:10 04/14/03
        
        Re: how i see SMT Vincent Diepeveen 05:53:47 04/15/03
        
        Re: Here are some actual numbers Robert Hyatt 22:03:17 04/12/03
        
        Re: Here are some actual numbers Tom Kerrigan 23:38:00 04/12/03
        
        Re: Here are some actual numbers Robert Hyatt 08:15:15 04/13/03
        
        Re: Here are some actual numbers Tom Kerrigan 13:06:28 04/14/03
        
        Re: Here are some actual numbers Robert Hyatt 14:53:19 04/14/03
        
        Re: Here are some actual numbers Tom Kerrigan 11:36:27 04/15/03
        
        Re: Here are some actual numbers Robert Hyatt 21:46:06 04/15/03
        
        Re: Here are some actual numbers Tom Kerrigan 22:44:49 04/15/03
        
        Re: Here are some actual numbers Robert Hyatt 09:12:04 04/16/03
        
        Re: Here are some actual numbers Sune Fischer 02:28:11 04/14/03
        
        Re: Here are some actual numbers Robert Hyatt 07:54:50 04/14/03
        
        Re: Here are some actual numbers Mike Siler 20:56:54 04/12/03
        
        Re: Here are some actual numbers Dave Gomboc 15:25:24 04/13/03
        
        Re: Here are some actual numbers Keith Evans 20:47:23 04/11/03
        
        Re: Here are some actual numbers Robert Hyatt 22:24:33 04/11/03
        
        Re: Here are some actual numbers Tom Kerrigan 20:32:22 04/12/03
        
        Re: Here are some actual numbers Robert Hyatt 22:04:52 04/12/03
        
        Re: Here are some actual numbers Tom Kerrigan 23:37:57 04/12/03
        
        Re: Here are some actual numbers Robert Hyatt 08:21:51 04/13/03
        
        Re: Here are some actual numbers Tom Kerrigan 12:50:22 04/14/03
        
        Re: Here are some actual numbers Robert Hyatt 14:54:14 04/14/03
        
        Re: Here are some actual numbers Ricardo Gibert 15:19:28 04/14/03
        
        Re: Here are some actual numbers Robert Hyatt 20:41:10 04/14/03
        
        Re: Here are some actual numbers Tom Kerrigan 11:56:38 04/15/03
        
        Re: Here are some actual numbers Robert Hyatt 21:01:34 04/15/03
        
        Re: Here are some actual numbers Tom Kerrigan 22:37:08 04/15/03
        
        Re: Here are some actual numbers Robert Hyatt 09:13:35 04/16/03
        
        Re: Here are some actual numbers Tom Kerrigan 22:39:10 04/15/03
        
        Re: Here are some actual numbers Robert Hyatt 09:15:02 04/16/03
        
        Re: Here are some actual numbers Vincent Diepeveen 05:21:42 04/13/03
        
        Re: Here are some actual numbers Vincent Diepeveen 05:32:37 04/13/03
        
        Re: Here are some actual numbers Robert Hyatt 08:27:53 04/13/03
        
        Re: Here are some actual numbers Vincent Diepeveen 08:49:28 04/13/03
        
        Re: Here are some actual numbers Robert Hyatt 19:39:39 04/13/03
        
        Re: Here are some actual numbers Vincent Diepeveen 14:15:41 04/14/03
        
        Re: Here are some actual numbers Robert Hyatt 14:43:12 04/14/03
        
        Re: Here are some actual numbers Vincent Diepeveen 05:56:54 04/15/03
        
        Re: Here are some actual numbers Robert Hyatt 21:05:02 04/15/03
        
        Re: Here are some actual numbers Vincent Diepeveen 04:54:40 04/16/03
        
        Re: Here are some actual numbers Robert Hyatt 11:26:15 04/16/03
        
        Re: Here are some actual numbers Ricardo Gibert 01:25:44 04/16/03
        
        Re: Here are some actual numbers Robert Hyatt 11:28:28 04/16/03
        
        Re: Here are some actual numbers Tony Werten 01:54:11 04/15/03
        
        Re: Here are some actual numbers Robert Hyatt 21:07:21 04/15/03
        
        Re: Here are some actual numbers Tony Werten 00:39:36 04/16/03
        
        Re: Here are some actual numbers Vincent Diepeveen 04:49:59 04/16/03
        
        Re: Here are some actual numbers Robert Hyatt 09:16:23 04/16/03
        
        Re: Here are some actual numbers Vincent Diepeveen 09:43:26 04/16/03
        
        Re: Here are some actual numbers Robert Hyatt 11:30:03 04/16/03
        
        Re: Here are some actual numbers J. Wesley Cleveland 17:01:19 04/16/03
        
        Re: Here are some actual numbers Robert Hyatt 07:39:07 04/17/03
        
        Re: Here are some actual numbers Ricardo Gibert 17:22:26 04/16/03
        
        Re: Here are some actual numbers Robert Hyatt 07:42:23 04/17/03
        
        Re: Here are some actual numbers Ricardo Gibert 22:36:20 04/17/03
        
        Re: Here are some actual numbers Robert Hyatt 06:33:15 04/18/03
        
        Re: Here are some actual numbers Ricardo Gibert 07:15:33 04/18/03
        
        Re: Here are some actual numbers Robert Hyatt 08:48:00 04/18/03
        
        Re: Here are some actual numbers Vincent Diepeveen 06:03:21 04/15/03
        
        Re: Here are some actual numbers Robert Hyatt 21:10:22 04/15/03
        
        Re: Here are some actual numbers Eugene Nalimov 09:52:17 04/12/03
        
        Re: Here are some actual numbers Robert Hyatt 23:06:48 04/12/03
        
        Re: Here are some actual numbers Keith Evans 14:17:43 04/11/03
        
        Re: Here are some actual numbers Tom Kerrigan 14:21:48 04/11/03
        
        Re: 3.06 Xeon Test Results Tom Kerrigan 12:19:14 04/11/03
  - Re: 3.06 Xeon Test Results Vincent Diepeveen 06:53:04 04/10/03
    - Re: 3.06 Xeon Test Results Robert Hyatt 08:31:34 04/10/03
    - Re: 3.06 Xeon Test Results Charles Worthington 08:18:43 04/10/03
      - Re: 3.06 Xeon Test Results Vincent Diepeveen 06:47:42 04/11/03
        
        Re: 3.06 Xeon Test Results Robert Hyatt 07:59:31 04/11/03
      - Re: 3.06 Xeon Test Results Jay Urbanski 19:39:40 04/10/03
      - Re: 3.06 Xeon Test Results Robert Hyatt 11:23:51 04/10/03

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