From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <stephen@networkplumber.org>
Received: from mail-ig0-f170.google.com (mail-ig0-f170.google.com
 [209.85.213.170]) by dpdk.org (Postfix) with ESMTP id F0B525A73
 for <dev@dpdk.org>; Mon, 30 Mar 2015 07:28:57 +0200 (CEST)
Received: by ignm3 with SMTP id m3so65940885ign.0
 for <dev@dpdk.org>; Sun, 29 Mar 2015 22:28:57 -0700 (PDT)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=1e100.net; s=20130820;
 h=x-gm-message-state:mime-version:in-reply-to:references:date
 :message-id:subject:from:to:cc:content-type;
 bh=Yi3LODPr5AYxaBMHB3tax0iQvbAjbPQLMODPreU7yPs=;
 b=Ae0GR8PXzuGTBIbl1zyHemNQj89mu3qfcNWsNSK/gn8zjFHspo2fEALJS2r1K+qq9Y
 7sG4L5twD7VThF634LRDbAk8kICA7Jk7sPN4v3bz0zEnB4b20Fl0aKmEQXdtxA7wX/Fz
 2yjm8+uSsbW4FBKtxglp5ExyE5PXVxz6Gpc+NQk8r2wZ9p00lf17joNj0O1fJxFYPIzg
 BYgEMSR6uaj3TKutM7dWIB9L6z3UKKwHOMMnRPgVxx1y5ebSSejfJLUJVaVEHQSulKWE
 e6oOKa9fWpbrbejTSFEJBJK0cggs2k2kf0IjfyhTZAg2m//fJua8olM4dbsA15JPp0SO
 BbKA==
X-Gm-Message-State: ALoCoQmNmtb2B/GayJDEAnICJPJiU0T9CgeKN9BkLbMpxuTHIIHrcHGwQxfDXpDZVLwWZ602nh+G
MIME-Version: 1.0
X-Received: by 10.107.26.195 with SMTP id a186mr45764660ioa.78.1427693337252; 
 Sun, 29 Mar 2015 22:28:57 -0700 (PDT)
Received: by 10.64.58.129 with HTTP; Sun, 29 Mar 2015 22:28:57 -0700 (PDT)
In-Reply-To: <20150328003821.GA13992@mhcomputing.net>
References: <1426609081-47774-1-git-send-email-rsanford@akamai.com>
 <D13AEFC2.7FCE%rsanford@akamai.com>
 <CAOaVG15T2v7Nq-sHUDeEtwjK17GJpQ5GZTOuLr_Q6jgECmAAoA@mail.gmail.com>
 <20150328003821.GA13992@mhcomputing.net>
Date: Sun, 29 Mar 2015 22:28:57 -0700
Message-ID: <CAOaVG17o39ksj7K_51SQTza1reUKq=paZPQiQY6ubcC48rPu9A@mail.gmail.com>
From: Stephen Hemminger <stephen@networkplumber.org>
To: Matthew Hall <mhall@mhcomputing.net>
Content-Type: text/plain; charset=UTF-8
X-Content-Filtered-By: Mailman/MimeDel 2.1.15
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [RFC PATCH] eal: rte_rand yields only 62 random bits
X-BeenThere: dev@dpdk.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: patches and discussions about DPDK <dev.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
X-List-Received-Date: Mon, 30 Mar 2015 05:28:58 -0000

if some one needs PRNG, th GNU scientific library has lots of them
https://www.gnu.org/software/gsl/manual/html_node/Random-number-generator-algorithms.html

On Fri, Mar 27, 2015 at 5:38 PM, Matthew Hall <mhall@mhcomputing.net> wrote:

> On Fri, Mar 27, 2015 at 05:03:02PM -0700, Stephen Hemminger wrote:
> > I would argue remove rte_rand from DPDK.
>
> +1
>
> To paraphrase Donald Knuth, "Random numbers should not be generated [using
> a
> function coded] at random."
>
> It'd be better to fix libc, or considering that has a slow dev cycle and
> platform compatibility limits, use some simple, semi-random,
> high-performance
> BSD licensed routine from a known-good library.
>
> Matthew.
>