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Groups > comp.lang.forth > #17820

Re: DTC

From Bernd Paysan <bernd.paysan@gmx.de>
Newsgroups comp.lang.forth
Subject Re: DTC
Date 2012-12-03 16:48 +0100
Organization 1&1 Internet AG
Message-ID <3305983.3dZSVTLMbE@sunwukong.fritz.box> (permalink)
References (7 earlier) <DKKdnRsQzsib5CXNnZ2dnUVZ8gednZ2d@supernews.com> <2012Nov30.151239@mips.complang.tuwien.ac.at> <8cudneSQd9MoQiXNnZ2dnUVZ8nWdnZ2d@supernews.com> <2012Dec1.163416@mips.complang.tuwien.ac.at> <lMadnRQJgbWaGSHNnZ2dnUVZ8oKdnZ2d@supernews.com>

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Andrew Haley wrote:
> It's the cache line granularity that really matters, though: you won't
> gain anything from separating headers and words unless more words in
> your working set share the same cache lines.  A word that's only 20
> bytes long may occupy a line of its own regardless of whether its
> headers are in the same space.

But usually, you do have spatial locality, you have several factors 
close together and you will use them together. Desktop CPUs usually have 
an abundance of cache, but having to fetch a whole cache line for a 
single variable just because it is surrounded by header and code field 
is not very efficient.

-- 
Bernd Paysan
"If you want it done right, you have to do it yourself"
http://bernd-paysan.de/

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DTC Mark Wills <forthfreak@gmail.com> - 2012-11-27 08:01 -0800
  Re: DTC Paul Rubin <no.email@nospam.invalid> - 2012-11-27 08:55 -0800
    Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-11-27 09:01 -0800
  Re: DTC Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-11-27 17:42 -0800
    Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-11-27 23:50 -0800
      Re: DTC Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-11-28 04:41 -0600
        Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-11-28 02:48 -0800
          Re: DTC Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-11-28 05:27 -0600
            Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-11-28 03:51 -0800
              Re: DTC Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-11-28 21:56 -0800
                Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-11-29 01:26 -0800
                Re: DTC Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-11-29 22:34 -0800
                Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-11-30 01:42 -0800
                Re: DTC Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-11-30 13:18 -0800
                Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-12-01 01:42 -0800
                Re: DTC Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-12-03 15:25 -0800
                Re: DTC Alex McDonald <blog@rivadpm.com> - 2012-12-03 16:18 -0800
                Re: DTC "Rod Pemberton" <do_not_have@notemailnotz.cnm> - 2012-12-03 21:20 -0500
                Re: DTC "Elizabeth D. Rather" <erather@forth.com> - 2012-12-03 17:29 -1000
                Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-12-04 00:12 -0800
                Re: DTC Paul Rubin <no.email@nospam.invalid> - 2012-12-05 11:35 -0800
                Re: DTC Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-12-04 20:17 -0800
                Re: DTC Ron Aaron <rambamist@gmail.com> - 2012-12-05 08:31 +0200
                Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-12-04 23:48 -0800
                Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-12-04 23:53 -0800
                Re: DTC Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-12-05 12:13 -0800
                Re: DTC Alex McDonald <blog@rivadpm.com> - 2012-12-05 15:26 -0800
                Re: DTC Ron Aaron <rambamist@gmail.com> - 2012-12-06 06:32 +0200
                Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-12-06 01:07 -0800
                Re: DTC Alex McDonald <blog@rivadpm.com> - 2012-12-06 04:23 -0800
                Re: DTC Bernd Paysan <bernd.paysan@gmx.de> - 2012-12-06 15:49 +0100
                Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-12-06 07:42 -0800
                Re: DTC Alex McDonald <blog@rivadpm.com> - 2012-12-06 08:30 -0800
                Re: DTC Paul Rubin <no.email@nospam.invalid> - 2012-12-06 09:45 -0800
                Re: DTC albert@spenarnc.xs4all.nl (Albert van der Horst) - 2012-12-06 21:41 +0000
                Re: DTC "A. K." <akk@nospam.org> - 2012-12-06 23:15 +0100
                Re: DTC albert@spenarnc.xs4all.nl (Albert van der Horst) - 2012-12-08 01:27 +0000
                Re: DTC "A. K." <akk@nospam.org> - 2012-12-08 11:19 +0100
                Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-12-08 03:55 -0800
                Re: DTC Bernd Paysan <bernd.paysan@gmx.de> - 2012-12-08 13:44 +0100
                Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-12-08 06:05 -0800
                Re: DTC Bernd Paysan <bernd.paysan@gmx.de> - 2012-12-08 18:35 +0100
                Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-12-08 11:20 -0800
                Re: DTC Bernd Paysan <bernd.paysan@gmx.de> - 2012-12-09 01:01 +0100
                Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-12-08 06:10 -0800
                Re: DTC Bernd Paysan <bernd.paysan@gmx.de> - 2012-12-08 18:57 +0100
                Re: DTC "A. K." <akk@nospam.org> - 2012-12-08 19:46 +0100
                Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-12-08 11:23 -0800
                Re: DTC Bernd Paysan <bernd.paysan@gmx.de> - 2012-12-08 13:37 +0100
                Re: DTC "A. K." <akk@nospam.org> - 2012-12-08 14:41 +0100
                Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-12-08 06:15 -0800
                Re: DTC "A. K." <akk@nospam.org> - 2012-12-08 17:07 +0100
                Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-12-06 14:16 -0800
                Re: DTC Brad Eckert <hwfwguy@gmail.com> - 2012-12-07 09:00 -0800
                Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-12-06 14:21 -0800
                Re: DTC "Elizabeth D. Rather" <erather@forth.com> - 2012-12-06 08:01 -1000
                Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-12-06 14:18 -0800
                Re: DTC "Elizabeth D. Rather" <erather@forth.com> - 2012-12-06 13:48 -1000
                Re: DTC "Rod Pemberton" <do_not_have@notemailnotz.cnm> - 2012-12-06 19:03 -0500
                Re: DTC Alex McDonald <blog@rivadpm.com> - 2012-12-07 02:59 -0800
                Re: DTC albert@spenarnc.xs4all.nl (Albert van der Horst) - 2012-12-06 13:13 +0000
                Re: DTC "Rod Pemberton" <do_not_have@notemailnotz.cnm> - 2012-12-05 20:39 -0500
                Re: DTC Bernd Paysan <bernd.paysan@gmx.de> - 2012-12-06 15:46 +0100
                Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-12-06 07:47 -0800
                Re: DTC Alex McDonald <blog@rivadpm.com> - 2012-12-06 08:36 -0800
                Re: DTC Alex McDonald <blog@rivadpm.com> - 2012-12-05 04:03 -0800
                Re: DTC "Clyde W. Phillips Jr." <cwpjr02@gmail.com> - 2012-12-06 20:30 -0800
                Re: DTC David Thompson <dave.thompson2@verizon.net> - 2012-12-11 23:52 -0500
                Re: DTC Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-12-12 10:59 -0800
                Re: DTC David Thompson <dave.thompson2@verizon.net> - 2012-12-31 02:43 -0500
                Re: DTC Hugh Aguilar <hughaguilar96@yahoo.com> - 2013-01-02 00:44 -0800
            Re: DTC albert@spenarnc.xs4all.nl (Albert van der Horst) - 2012-11-28 13:54 +0000
              Re: DTC "Clyde W. Phillips Jr." <cwpjr02@gmail.com> - 2012-12-06 20:16 -0800
    Re: DTC "Rod Pemberton" <do_not_have@notemailnotz.cnm> - 2012-11-28 06:58 -0500
      Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-11-28 04:50 -0800
        Re: DTC Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-11-28 07:08 -0600
          Re: DTC Mark Wills <forthfreak@gmail.com> - 2012-11-28 06:02 -0800
            Re: DTC Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-11-28 08:23 -0600
          Re: DTC anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-11-28 14:18 +0000
            Re: DTC Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-11-28 08:32 -0600
              Re: DTC anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-11-28 15:00 +0000
                Re: DTC Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-11-28 09:18 -0600
                Re: DTC anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-11-28 16:36 +0000
                Re: DTC Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-11-28 11:02 -0600
                Re: DTC anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-11-28 17:13 +0000
                Re: DTC Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-11-28 12:03 -0600
                Re: DTC anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-11-28 18:12 +0000
                Re: DTC Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-11-28 12:32 -0600
                Re: DTC anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-11-29 14:30 +0000
                Re: DTC Bernd Paysan <bernd.paysan@gmx.de> - 2012-11-29 18:05 +0100
                Re: DTC Alex McDonald <blog@rivadpm.com> - 2012-11-29 11:19 -0800
                Re: DTC Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-11-30 03:14 -0600
                Re: DTC anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-11-30 14:12 +0000
                Re: DTC Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-11-30 10:32 -0600
                Re: DTC anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-11-30 16:40 +0000
                Re: DTC anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-12-01 15:34 +0000
                Re: DTC Bernd Paysan <bernd.paysan@gmx.de> - 2012-12-01 21:23 +0100
                Re: DTC anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-12-03 16:28 +0000
                Re: DTC Bernd Paysan <bernd.paysan@gmx.de> - 2012-12-03 18:44 +0100
                Re: DTC Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-12-03 04:50 -0600
                Re: DTC Bernd Paysan <bernd.paysan@gmx.de> - 2012-12-03 16:48 +0100
                Re: DTC anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-12-03 15:59 +0000
                Re: DTC albert@spenarnc.xs4all.nl (Albert van der Horst) - 2012-11-30 15:34 +0000
                Re: DTC Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-11-30 10:36 -0600
                Re: DTC Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-11-30 12:47 -0800
                Re: DTC Alex McDonald <blog@rivadpm.com> - 2012-11-28 11:29 -0800
        Re: DTC "Rod Pemberton" <do_not_have@notemailnotz.cnm> - 2012-11-29 04:15 -0500
          Re: DTC "Elizabeth D. Rather" <erather@forth.com> - 2012-11-29 08:52 -1000
      Re: DTC Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-11-28 22:25 -0800
        Re: DTC "Rod Pemberton" <do_not_have@notemailnotz.cnm> - 2012-11-29 04:12 -0500
  Re: DTC humptydumpty <ouatubi@gmail.com> - 2012-11-28 02:04 -0800
  Re: DTC anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-11-28 14:21 +0000

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