From owner-freebsd-stable@freebsd.org Fri Nov 8 01:44:48 2019 Return-Path: Delivered-To: freebsd-stable@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 8CB791A28EC for ; Fri, 8 Nov 2019 01:44:48 +0000 (UTC) (envelope-from dewaynegeraghty@gmail.com) Received: from mail-wm1-x331.google.com (mail-wm1-x331.google.com [IPv6:2a00:1450:4864:20::331]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 478NPC3ZrPz3Bp9 for ; Fri, 8 Nov 2019 01:44:47 +0000 (UTC) (envelope-from dewaynegeraghty@gmail.com) Received: by mail-wm1-x331.google.com with SMTP id z26so4541564wmi.4 for ; Thu, 07 Nov 2019 17:44:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=IqOdOEW5RIOb9+/wQuSFpJTnE6Y3/pAkcOg0S5eJ/Zo=; b=gkykAkoRo7j+jqMsfedmBYGxJvUGY/F1IYSx9U8uaXC6nzPy208guJMpkkii8w3kOz QlsuRxeu6I1WKiMh2Ty9Yxy2ltCJAI2HrrLWkcjo/JeMzMpdhWY0YJ58dScGNmc5CKHu XyVLmZRbC1V/ePS4nUB9B2LUIrwThZz5XnCd9S//9JXbak3rx3TlXuGBMGELuFN60Yiy nwFjx6zZbsNL/s6eAkdBBirKqzam427/aaH1YTtxQEW/YHqjCu3u9g0Sjqs60L2keZj8 h/LyS5GAmCwjW2JicmLsK9f8J1QAVzM2GSxowhUweg0PMXQDa4yj00nQXEO/CfQgHMeR yFnQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=IqOdOEW5RIOb9+/wQuSFpJTnE6Y3/pAkcOg0S5eJ/Zo=; b=Y7Cl2fQFezsN5cA/Z0GgkmrI7wiEtKZ2g+nOLKXPqgxRG+3oMAYm2ltaEtdwkVczhN KqRLDBEgr1Nghk/Pac+b7JorT0GiKNEvx9+NTSsVt4YjP2N9y81nMPJ2EtSsUEPWx4J2 UjRX3CZ6vQoXHiCPxb36UTC/Y2GIGP+rOtnQuELJgsvLeBUbs4pe5jY8ptenkOljvnrn z+Jt1uX6WeQ1FFLEyfQRItvI1qVPTPmcZ/umTqf7JZWZKKCIbu1+E0hb58H2Jdul8zJy Fny0vFNnYgLwWQFvu0qXzJPT5HVoEKJgxa/IpQ2vkytAxmnSES0h3PIHBVszSOXMt0Rc Thpg== X-Gm-Message-State: APjAAAWv+cCtrZGVvQc3wP2vbSHeET4fIp7JsJj1c/qSXgNqUjmT2iye s2TPwTF0/MPRsbmR8SI3jfUysTFkvb34X+pAc7U82NVSaLo= X-Google-Smtp-Source: APXvYqwhtYNWKzn7cKnx2Q8SbcWD0jFZswBqYm/f+5l5O+S6Gb465EZ0rvuOwH7P7Mnbjf9mAIj9jPWats7lmCS5Y0s= X-Received: by 2002:a1c:f60d:: with SMTP id w13mr6243018wmc.150.1573177484007; Thu, 07 Nov 2019 17:44:44 -0800 (PST) MIME-Version: 1.0 From: Dewayne Geraghty Date: Fri, 8 Nov 2019 12:44:17 +1100 Message-ID: Subject: Who should I believe - iostat or mount -v? To: freebsd-stable stable X-Rspamd-Queue-Id: 478NPC3ZrPz3Bp9 X-Spamd-Bar: - Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=gkykAkoR; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of dewaynegeraghty@gmail.com designates 2a00:1450:4864:20::331 as permitted sender) smtp.mailfrom=dewaynegeraghty@gmail.com X-Spamd-Result: default: False [-2.00 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2a00:1450:4000::/36]; FREEMAIL_FROM(0.00)[gmail.com]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-stable@freebsd.org]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; RCVD_COUNT_TWO(0.00)[2]; RCPT_COUNT_ONE(0.00)[1]; IP_SCORE_FREEMAIL(0.00)[]; IP_SCORE(0.00)[ip: (-8.81), ipnet: 2a00:1450::/32(-2.76), asn: 15169(-2.01), country: US(-0.05)]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[gmail.com:+]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; RCVD_IN_DNSWL_NONE(0.00)[1.3.3.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.5.4.1.0.0.a.2.list.dnswl.org : 127.0.5.0]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; SUBJECT_ENDS_QUESTION(1.00)[]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US]; MIME_TRACE(0.00)[0:+,1:+,2:~]; RCVD_TLS_ALL(0.00)[]; DWL_DNSWL_NONE(0.00)[gmail.com.dwl.dnswl.org : 127.0.5.0] Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.29 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 08 Nov 2019 01:44:48 -0000 While monitoring various deivces I noticed that the results from mount -v and iostat weren't the same. I'm "assuming" that iostat is the more accurate due to geom tasting (on a memory disk?), or is something else at play? Simplest example: mount -v -t nonullfs |grep md7; iostat -d -c 1 -tda -x -I|grep md7 /dev/md7 on /s (ufs, asynchronous, local, noatime, writes: sync 4 async 268, reads: sync 1215 async 0, fsid 8abeba5db4f71f26) md7 1244.0 293.0 0.0 0.0 0 0.0 0.0