All of lore.kernel.org
 help / color / mirror / Atom feed
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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='bn42vk$ies$1@gatekeeper.tmr.com' \
    --to=davidsen@tmr.com \
    --cc=linux-kernel@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.