From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oi0-x235.google.com (mail-oi0-x235.google.com [IPv6:2607:f8b0:4003:c06::235]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 109133B25D for ; Wed, 4 May 2016 20:54:30 -0400 (EDT) Received: by mail-oi0-x235.google.com with SMTP id x19so86261258oix.2 for ; Wed, 04 May 2016 17:54:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-transfer-encoding; bh=XXqm7HM09uSdMOw6pxcV8hThr2yo5Hcv6XpeChDCXK8=; b=lIviU8eVgg8vZX4bhj+QOupHrcfHHJWVcizXVxqdMWWyL58NgpH8C1SpwJh2u2haEW wPowU5cwLM76eqeQZhoUj4bfR9hmshE0JYh0nucYD0DkmqD2A5WXkB9LPAtXZZyV6Cw2 m70JE3RzsT/BLw/7ufQ71Jj4OaV5onSDrinuzhMtnZGTpl3v+8C98HxwO1M9qIOIN0aF vFicvHJ/WwU2h4dKsnix+1OzyAsjZPIRwOvFiKsvpk0nLv1YfXFeHe1MGRXp4OSx9c1h nZoq1HbYohIMqR8WmGb+iRLdwX22FWeNsfl2FWUbEQEoqvoFuR9B0WhhTA91yiADUozV QinA== 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-transfer-encoding; bh=XXqm7HM09uSdMOw6pxcV8hThr2yo5Hcv6XpeChDCXK8=; b=C1rqek1VQAVsTGDFBLBZxbdTLiz+Hr3EJMaMdtHazIiUs1n0F3bWL8tH1i6D3dZjEN 3gKYLX4CF/kIaYA2JOH6wQCTuYu7YS3piOzRcyc54pkHjNnDQH1FCzUPkpjNvEs+gTBI wnT6D1jQ0zWx5NpgJtVUSu1C/0djf9Q46l44cORZZe2XWgpm+xndfI0FmyXprsIj9XuI NZhlmeLNLI05lppi/dj7UNeYtD4DT7matOAgv3xNRPuUqXyMdV3Zmyxl3SJ9L6xZg5r0 T1jDyCSO2Rrm/SJSJOOGmw0DZb5POB5Zd9kzJKJ5+PtFNPicp+Srr8F5N/e35PoezrqL YNsw== X-Gm-Message-State: AOPr4FUqN/c4QZYaUNM/8DjzTWfPonblJK1mT2LjZ9vexbheBqPYiL7tCVWsFnsnCv3C1iWuSF3ixW8K4zE9Aw== MIME-Version: 1.0 X-Received: by 10.157.4.174 with SMTP id 43mr5207156otm.127.1462409670427; Wed, 04 May 2016 17:54:30 -0700 (PDT) Received: by 10.202.81.76 with HTTP; Wed, 4 May 2016 17:54:30 -0700 (PDT) In-Reply-To: References: Date: Wed, 4 May 2016 17:54:30 -0700 Message-ID: From: Dave Taht To: "Luis E. Garcia" Cc: "cerowrt-devel@lists.bufferbloat.net" , Josh Datko Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: Re: [Cerowrt-devel] pcengines apu2c4 hardware random number generation X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 May 2016 00:54:31 -0000 I was doing a bunch of long running flent tests through an ath10k card in wpa2 mode on ubuntu and not running haveged or rng-tools going. cat /dev/hwrng showed no hardware random number generator module working, so I looked at the specs, didn't find one for the cpu. Have not checked to see if the intel ethernet driver or the ath10k actually add to the randomness pool... or apic... watch cat /proc/sys/kernel/random/entropy_avail is my idea of entertainment on a tuesday afternoon. I do see it refilling at a reasonable rate tho, even without haveged. I *like* hwrngs. On Wed, May 4, 2016 at 5:16 PM, Luis E. Garcia wrote: > Dave, > Can you give me more details on how you were genereating Randon Numbers a= nd > how did you run out of them. > > Luis > > On Wed, May 4, 2016 at 4:28 PM, Dave Taht wrote: >> >> one of the few flaws in this board so far is that it does not appear >> the GX-412TC in it has a hardware random number generator. >> >> (yes, I just ran it out of random numbers) >> >> There are ton of "hardware random number generators out there" - quite >> a few fairly "cheap" ones on usb. >> >> The board has internal usb headers, gpios, and i2c. Any other means of >> generating good random numbers? >> >> http://pcengines.ch/pdf/apu2.pdf >> >> so I figure that there might be something even simpler out there from >> the pi-ish or beaglebone world that could be repurposed to suit? >> >> I've always wanted to have *3* hwrngs - one designed by the NSA, >> another by the KGB, and one by open source folk, and to mix them >> together. >> >> -- >> Dave T=C3=A4ht >> Let's go make home routers and wifi faster! With better software! >> http://blog.cerowrt.org >> _______________________________________________ >> Cerowrt-devel mailing list >> Cerowrt-devel@lists.bufferbloat.net >> https://lists.bufferbloat.net/listinfo/cerowrt-devel > > --=20 Dave T=C3=A4ht Let's go make home routers and wifi faster! With better software! http://blog.cerowrt.org