From owner-freebsd-fs@freebsd.org Thu Mar 8 10:06:30 2018 Return-Path: Delivered-To: freebsd-fs@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 0ABF4F481F5; Thu, 8 Mar 2018 10:06:30 +0000 (UTC) (envelope-from ronald-lists@klop.ws) Received: from smarthost1.greenhost.nl (smarthost1.greenhost.nl [195.190.28.92]) (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 9EC46723A6; Thu, 8 Mar 2018 10:06:29 +0000 (UTC) (envelope-from ronald-lists@klop.ws) Received: from smtp.greenhost.nl ([213.108.110.112]) by smarthost1.greenhost.nl with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.84_2) (envelope-from ) id 1etsRK-0005to-2u; Thu, 08 Mar 2018 11:06:22 +0100 Content-Type: text/plain; charset=utf-8; format=flowed; delsp=yes To: freebsd-fs@freebsd.org, "freebsd-arm@freebsd.org" Date: Thu, 08 Mar 2018 11:06:23 +0100 Subject: gstat more writes per seconds than there are seconds per write MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: "Ronald Klop" Message-ID: User-Agent: Opera Mail/12.16 (FreeBSD) X-Authenticated-As-Hash: 398f5522cb258ce43cb679602f8cfe8b62a256d1 X-Virus-Scanned: by clamav at smarthost1.samage.net X-Spam-Level: / X-Spam-Score: -0.2 X-Spam-Status: No, score=-0.2 required=5.0 tests=ALL_TRUSTED, BAYES_50 autolearn=disabled version=3.4.0 X-Scan-Signature: 2ecd0b53b7de9511489f92806276a3d7 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Mar 2018 10:06:30 -0000 Hello, I'm confused by this output. w/s = 5, but ms/w is 1108; how can I put 5 writes in a second if the average write takes more than a second? Is my SD card super parallel? :-) Sometimes the numbers are even higher. dT: 1.010s w: 1.000s L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name 17 5 0 0 0.0 5 420 1108 81.7 mmcsd0 0 0 0 0 0.0 0 0 0.0 0.0 da0 0 0 0 0 0.0 0 0 0.0 0.0 mmcsd0s1 17 5 0 0 0.0 5 420 1108 81.7 mmcsd0s2 0 0 0 0 0.0 0 0 0.0 0.0 msdosfs/MSDOSBOOT 17 5 0 0 0.0 5 420 1108 81.7 mmcsd0s2a 17 5 0 0 0.0 5 420 1108 81.7 ufs/rootfs [root@rpi2 ~]# uname -a dmesg | grep mmc FreeBSD rpi2 11.1-RELEASE-p6 FreeBSD 11.1-RELEASE-p6 #0 r328567: Tue Jan 30 20:10:37 CET 2018 root@rpi2:/mnt/usbdisk/usr/obj/mnt/usbdisk/usr/src/sys/RPI2 arm [root@rpi2 ~]# dmesg | grep mmc mmc0: on sdhci_bcm0 mmc0: CMD8 failed, RESULT: 1 mmcsd0: 2GB at mmc0 41.6MHz/4bit/65535-block Regards, Ronald.