From owner-freebsd-net@freebsd.org Thu Apr 12 21:52:24 2018 Return-Path: Delivered-To: freebsd-net@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 78EB3F94403 for ; Thu, 12 Apr 2018 21:52:24 +0000 (UTC) (envelope-from niels@kobschaetzki.net) Received: from hatchetman.psychedelicpirate.com (unknown [IPv6:2001:1560:a000:2:1313:d6dc:9261:d983]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id DBAE37CEA0 for ; Thu, 12 Apr 2018 21:52:23 +0000 (UTC) (envelope-from niels@kobschaetzki.net) Received: from hatchetman.psychedelicpirate.com (localhost [127.0.0.1]) by hatchetman.psychedelicpirate.com (OpenSMTPD) with ESMTP id 440960ad for ; Thu, 12 Apr 2018 23:52:18 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=kobschaetzki.net; h=to :from:subject:message-id:date:mime-version:content-type :content-transfer-encoding; s=selector1; bh=G765TgQeyzCmLiQ7vGF+ W/IXJqE=; b=N1q08Sv5nznFYDYlq46bquXIoCV5CP/uT2j0AfhcIpL5dORswMF7 fNWz4TKwKbIfmpBZk7kTQ5ULPzoaXXq2rrMtbJSnXjUhmRN5jVCqb0CnQNTGediT gfYsPiSwtLOldPe+9NvHcaGWObKE0wSs3xFqpM1yhFR539qwVtA3/Ag= DomainKey-Signature: a=rsa-sha1; c=nofws; d=kobschaetzki.net; h=to:from :subject:message-id:date:mime-version:content-type :content-transfer-encoding; q=dns; s=selector1; b=F7LlqNWHmDFuYB uMbAI+9pQLFlMkCxWAXfPvpU2GdWQnZOwWv/rUiq1SRgoGY8mpqbEOoVjpLOepuU m4rn6oFh6ice3/amGV6BHYVU9EJU6ENDYWv092eJieP6hjqeXVruyWR/sg79X9Gx dOi+2uD5N36uuMjtboDKHNYU32REY= Received: from hatchetman.psychedelicpirate.com (localhost [127.0.0.1]) by hatchetman.psychedelicpirate.com (OpenSMTPD) with ESMTP id cb2a28bb for ; Thu, 12 Apr 2018 23:52:13 +0200 (CEST) Received: from netcat.fritz.box (ip5b41bd2e.dynamic.kabel-deutschland.de [91.65.189.46]) by mail.kobschaetzki.net (OpenSMTPD) with ESMTPSA id 104d4f68 (TLSv1.2:ECDHE-RSA-CHACHA20-POLY1305:256:NO) for ; Thu, 12 Apr 2018 23:52:13 +0200 (CEST) To: freebsd-net@freebsd.org From: =?UTF-8?Q?Niels_Kobsch=c3=a4tzki?= Subject: High rate of NFS cache misses after upgrading from 10.3-prerelease to 11.1-release Message-ID: Date: Thu, 12 Apr 2018 23:52:13 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Content-Language: en-US X-Virus-Scanned: ClamAV using ClamSMTP X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 12 Apr 2018 21:52:24 -0000 Hi, sorry for the cross-posting but so far I had no real luck on the forum or on question, thus I want to try my luck here as well. I upgraded a machine from 10.3-Prerelease (custom kernel with tcp_fastopen added) to 11.1-Release (standard kernel) with freebsd-update. I have two other machines that are still on 10.3-Prerelease. Those machines mount an NFS-export from a Linux-NFS-server and use NFSv3. The machine that got upgraded shows now far more cache misses for getattr than on the 10.3-machines (we talk a factor of 100) in munin. munin also shows a lot more cache-misses for other metrics like biow, biorl, biod (where can I find what those metrics mean=E2=80=A6currently I have not even an understanding what thes= e are) etc.=C2=A0 Can anybody help me how I can debug this problem or has an idea what could cause the problem? The result of this behavior is that this machine shows a lower performance than the others and I cannot upgrade other machines before I didn't fix this bug. Thanks, Niels