From owner-freebsd-current@freebsd.org Mon Mar 12 03:30:27 2018 Return-Path: Delivered-To: freebsd-current@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 04AC2F44348 for ; Mon, 12 Mar 2018 03:30:27 +0000 (UTC) (envelope-from marklmi26-fbsd@yahoo.com) Received: from sonic316-14.consmr.mail.bf2.yahoo.com (sonic316-14.consmr.mail.bf2.yahoo.com [74.6.130.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id A062E8C82A for ; Mon, 12 Mar 2018 03:30:26 +0000 (UTC) (envelope-from marklmi26-fbsd@yahoo.com) X-YMail-OSG: 4Jz6rgIVM1nhKXprC1Z1azI5H6TezeHlEagiVREK_Q0DG3G8tVWyzQVewb9LqDb 5vmsXDxwSmW9yYnl3MwR.1Iwvzgc7UWFWUuquLlTso.cdjRZfNOU9DNhKAZcSlDk38OuRBprdfER fxdN16p_.A8MYeXuOpClMmPsUY7f9nR.ULLgmoHBPkEZxmlOuM1KKKX0_Ke5vYZ4rtelmOagVrPW RHy6Xkozy9aB7A8DGzwA2mcoCSiXOLeV0cWhovNqtTpyju9EpsXMY6MxGY0HC1ttYp5K963M54rA GAJUM8traUSZ.Y1_RvASIquUd1QzjIC30bFPU3RH8xEfb6OBOjzxfAYqQ3vjFDza7EMmRLSRaR0i zdU.y12n8BIHfOkbk68oTvhoCSnHypYvS62dspzCOFTlBaBNMH_3gmwLgqukdaz0i8z0C8nAUfuJ a4qwxCZkoFdhLZwO7pPGR43OBXfUi8B_tbZm6gL1k7dN08Fmf3Pie.DliUckk6k6E2YXiMQ1T9Nh Y3A4b3zKaIB2OZKLsiQGwHglaQ01KUJw8umAE Received: from sonic.gate.mail.ne1.yahoo.com by sonic316.consmr.mail.bf2.yahoo.com with HTTP; Mon, 12 Mar 2018 03:30:20 +0000 Received: from c-76-115-7-162.hsd1.or.comcast.net (EHLO [192.168.1.25]) ([76.115.7.162]) by smtp429.mail.bf1.yahoo.com (Oath Hermes SMTP Server) with ESMTPA ID 59cb786fe17918ac84cc445eae8c4fce; Mon, 12 Mar 2018 03:30:17 +0000 (UTC) From: Mark Millard Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 11.2 \(3445.5.20\)) Subject: Re: Strange ARC/Swap/CPU on yesterday's -CURRENT Message-Id: Date: Sun, 11 Mar 2018 20:30:15 -0700 Cc: "O. Hartmann" To: jroberson@jroberson.net, freebsd-current@freebsd.org X-Mailer: Apple Mail (2.3445.5.20) X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 12 Mar 2018 03:30:27 -0000 As I understand, O. Hartmann's report ( ohartmann at walstatt.org ) in: = https://lists.freebsd.org/pipermail/freebsd-current/2018-March/068806.html= includes a system with a completely non-ZFS context: UFS only. Quoting = that part: > This is from a APU, no ZFS, UFS on a small mSATA device, the APU = (PCenigine) works as a > firewall, router, PBX): >=20 > last pid: 9665; load averages: 0.13, 0.13, 0.11 > up 3+06:53:55 00:26:26 19 processes: 1 running, 18 sleeping CPU: = 0.3% user, 0.0% > nice, 0.2% system, 0.0% interrupt, 99.5% idle Mem: 27M Active, 6200K = Inact, 83M > Laundry, 185M Wired, 128K Buf, 675M Free Swap: 7808M Total, 2856K = Used, 7805M Free > [...] >=20 > The APU is running CURRENT ( FreeBSD 12.0-CURRENT #42 r330608: Wed Mar = 7 16:55:59 CET > 2018 amd64). Usually, the APU never(!) uses swap, now it is starting = to swap like hell > for a couple of days and I have to reboot it failty often. Unless this is unrelated, it would suggest that ZFS and its ARC need not be involved. Would what you are investigating relative to your "NUMA and concurrency related work" fit with such a non-ZFS (no-ARC) context? =3D=3D=3D Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar)