From owner-freebsd-arm@freebsd.org Wed Aug 15 14:56:32 2018 Return-Path: Delivered-To: freebsd-arm@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 5ED401058AC4 for ; Wed, 15 Aug 2018 14:56:32 +0000 (UTC) (envelope-from jmg@gold.funkthat.com) Received: from gold.funkthat.com (gate2.funkthat.com [208.87.223.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "gate2.funkthat.com", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id C071390E18 for ; Wed, 15 Aug 2018 14:56:31 +0000 (UTC) (envelope-from jmg@gold.funkthat.com) Received: from gold.funkthat.com (localhost [127.0.0.1]) by gold.funkthat.com (8.15.2/8.15.2) with ESMTPS id w7FEuOC8041282 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Wed, 15 Aug 2018 07:56:24 -0700 (PDT) (envelope-from jmg@gold.funkthat.com) Received: (from jmg@localhost) by gold.funkthat.com (8.15.2/8.15.2/Submit) id w7FEuOh9041281; Wed, 15 Aug 2018 07:56:24 -0700 (PDT) (envelope-from jmg) Date: Wed, 15 Aug 2018 07:56:24 -0700 From: John-Mark Gurney To: Mark Millard Cc: Trev , freebsd-arm@freebsd.org Subject: Re: RPI3 swap experiments (grace under pressure) Message-ID: <20180815145624.GU97145@funkthat.com> Mail-Followup-To: Mark Millard , Trev , freebsd-arm@freebsd.org References: <20180813185350.GA47132@www.zefox.net> <20180814014226.GA50013@www.zefox.net> <02fe39af-a02c-fb6a-70b0-da3b7fd06c22@goodgas.com.au> <20180814213107.GA51051@www.zefox.net> <2f3bed05-b27e-420b-e831-1c8286edf35e@sentry.org> <16004AB0-B499-4F30-8C14-AAE5E45B0A3B@yahoo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <16004AB0-B499-4F30-8C14-AAE5E45B0A3B@yahoo.com> X-Operating-System: FreeBSD 11.0-RELEASE-p7 amd64 X-PGP-Fingerprint: D87A 235F FB71 1F3F 55B7 ED9B D5FF 5A51 C0AC 3D65 X-Files: The truth is out there X-URL: https://www.funkthat.com/ X-Resume: https://www.funkthat.com/~jmg/resume.html X-TipJar: bitcoin:13Qmb6AeTgQecazTWph4XasEsP7nGRbAPE X-to-the-FBI-CIA-and-NSA: HI! HOW YA DOIN? can i haz chizburger? User-Agent: Mutt/1.6.1 (2016-04-27) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.4.3 (gold.funkthat.com [127.0.0.1]); Wed, 15 Aug 2018 07:56:24 -0700 (PDT) X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 15 Aug 2018 14:56:32 -0000 Mark Millard via freebsd-arm wrote this message on Wed, Aug 15, 2018 at 07:39 -0700: > On 2018-Aug-14, at 5:20 PM, Trev wrote: > > > George Mitchell wrote on 15/08/2018 08:33: > >> On 08/14/18 18:17, Jedi Tek'Unum wrote: > >>> I firmly disagree with the entire concept of out of memory killers. They are simply evil and in my opinion a complete cop-out. I first encountered this kind of kludge back in the ???80s with AIX. It was bad then and it still is today. Frankly I find it ridiculous that they still exist. > >>> [...] > >> However: consider the subject (Raspberry Pi). -- George > > > > When researching whether 512M of RAM was considered "usable" for a FreeBSD buildworld, I came across [https://reviews.freebsd.org/D8302] from October 2016 where just 256M was considered a test case for i386 and amd64 (-j1 I'm assuming) buildworlds which should succeed. > > What I see there is pho writing: > > QUOTE > I have run stress2 testes on i386 and amd64. > I ran a buildkernel on both i386 and amd64 with 256MB RAM / UP. > Buildworld was run with various small RAM configurations. > END QUOTE > > It explicitly lists buildkernel for 256 MiBytes of RAM, not > buildworld. I'm not sure what the "UP" is for. "RAM / UP" > looks like it might be a ratio but may be it was indicating > not SMP? It not clear if this buildkernel testing included > kernel-toolchain as well. UP mean Uniprocessor, or no -j flag... -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."