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From: davidsen@tmr.com (bill davidsen)
To: linux-kernel@vger.kernel.org
Subject: Re: [RFC] frandom - fast random generator module
Date: 21 Oct 2003 19:55:32 GMT	[thread overview]
Message-ID: <bn42vk$ies$1@gatekeeper.tmr.com> (raw)
In-Reply-To: 3F8E8101.70009@pobox.com

In article <3F8E8101.70009@pobox.com>, Jeff Garzik  <jgarzik@pobox.com> wrote:
| Eli Billauer wrote:

| > Besides, it's quite easy to do something wrong with random numbers. By 
| > having a good source of random data, I suppose we can spare a lot of 
| > people the headache of getting their own user-space application right 
| > for the one-off thing they want to do.
| 
| This is completely bogus logic.  I can use this (incorrect) argument to 
| similar push for applications doing bsearch(3) or qsort(3) via a system 
| call.

Your argument is correct, but this is data generation rather than
analysis. In doing simulation it's desirable to ensure that multiple
instances of a program don't use the same numbers.

For instance, simulating user load against a server; I want the
simulation of human thinking time to be a number in the range n..m and
not to be the same for all threads. Sure I can get around that, and do,
but I wouldn't mind having a simple source of random bytes which was
quality PRNG and unique.

Again, this is not a case that this is a "must have" feature, just an
opinion that there are benefits to having such a feature which don't
apply to the cases you cited above.
-- 
bill davidsen <davidsen@tmr.com>
  CTO, TMR Associates, Inc
Doing interesting things with little computers since 1979.

  parent reply	other threads:[~2003-10-21 20:05 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-10-16  8:22 [RFC] frandom - fast random generator module Eli Billauer
2003-10-16  8:36 ` Nick Piggin
2003-10-16 10:20   ` Eli Billauer
2003-10-16 10:48     ` Nick Piggin
2003-10-16 11:29     ` Jeff Garzik
2003-10-16 12:27       ` Eli Billauer
2003-10-16 15:10         ` Jeff Garzik
2003-10-16 16:20       ` Andreas Dilger
2003-10-16 16:31         ` Jeff Garzik
2003-10-16 18:18           ` Andreas Dilger
2003-10-16 18:52             ` Richard B. Johnson
2003-10-16 19:31             ` Matt Mackall
2003-10-16 20:40               ` Andreas Dilger
2003-10-16 21:03             ` David Wagner
2003-10-16 23:17             ` Jeff Garzik
2003-10-16 23:42               ` Andreas Dilger
2003-10-17  0:34                 ` David Wagner
2003-10-16 17:45         ` Matt Mackall
2003-10-16 18:38           ` Andreas Dilger
2003-10-16 19:08             ` Matt Mackall
2003-10-16 20:27               ` Andreas Dilger
2003-10-16 20:37                 ` Matt Mackall
2003-10-16 17:31       ` Matt Mackall
2003-10-16 23:03         ` Eli Billauer
2003-10-16 23:07           ` Jeff Garzik
2003-10-16 23:13           ` Matt Mackall
2003-10-16 23:35           ` jw schultz
2003-10-21 19:24       ` bill davidsen
2003-10-21 19:55       ` bill davidsen [this message]
2003-10-21 21:21         ` Helge Hafting
2003-10-21 22:18           ` bill davidsen
2003-10-22  1:04             ` H. Peter Anvin
2003-10-21 19:17   ` bill davidsen
2003-10-21 21:00     ` H. Peter Anvin
2003-10-21 22:08       ` bill davidsen
2003-10-22  1:06         ` H. Peter Anvin
2003-10-22  2:56           ` jw schultz
2003-10-22 16:22             ` Kent Borg
2003-10-23  2:46               ` Dale Farnsworth
2003-10-23  3:22               ` Sandy Harris
2003-10-23 14:15                 ` Kent Borg
2003-10-24 17:37                 ` bill davidsen
2003-10-24 17:54                   ` Theodore Ts'o
2003-10-24 20:59                   ` David Wagner
2003-10-24 21:33                     ` jw schultz
2003-10-22  3:49           ` Sandy Harris
2003-10-16 10:45 ` Ingo Oeser
2003-10-21 19:30   ` bill davidsen
     [not found] <HbGf.8rL.1@gated-at.bofh.it>
     [not found] ` <HbQ5.ep.27@gated-at.bofh.it>
     [not found]   ` <Hdyv.2Vd.13@gated-at.bofh.it>
     [not found]     ` <HeE6.4Cc.1@gated-at.bofh.it>
     [not found]       ` <HjaT.3nN.7@gated-at.bofh.it>
     [not found]         ` <Hjkw.3Al.11@gated-at.bofh.it>
2003-10-16 17:46           ` David Mosberger-Tang
2003-10-16 19:28             ` Eli Billauer
2003-10-16 20:42               ` Andreas Dilger
2003-10-21 19:46                 ` bill davidsen
2003-10-16 21:30               ` Matt Mackall

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