From owner-freebsd-stable@freebsd.org Fri Mar 3 21:33:41 2017 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 54954CF782E for ; Fri, 3 Mar 2017 21:33:41 +0000 (UTC) (envelope-from amarat@li.ru) Received: from fallback1.mail.ru (fallback1.mail.ru [94.100.181.184]) by mx1.freebsd.org (Postfix) with ESMTP id 59F5716BD for ; Fri, 3 Mar 2017 21:33:37 +0000 (UTC) (envelope-from amarat@li.ru) Received: from smtp29.i.mail.ru (smtp29.i.mail.ru [94.100.177.89]) by fallback1.mail.ru (mPOP.Fallback_MX) with ESMTP id 5675A8BF35F9 for ; Fri, 3 Mar 2017 20:31:26 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mail.ru; s=mail2; h=Content-Type:MIME-Version:Date:Message-ID:Subject:From:To; bh=Ra4mLpuDOlxHJN+brZsWYFC5HCAiLXDaIAw03PQ82u0=; b=h7MnCqB7zSMr/Nqn70K//ZSgsNW5rU9xpab+m2Cwg5Vtmo3GRAJrcINHvYF9lBdPPNvWJNpcbarMqbGMGjuEBfe3OAZIrvGf+sjm2fAk7ZrxsvN1YpuvPX9ZMg64S0e7pQZ+4+dYEcLWbQtdbPXvuHJowwfJ72nvYG4kQSMLDqE=; Received: from [46.42.129.11] (port=57692 helo=zealot.ksu.ru) by smtp29.i.mail.ru with esmtpa (envelope-from ) id 1cjr2z-0004vt-D1 for freebsd-stable@freebsd.org; Fri, 03 Mar 2017 20:31:18 +0300 To: freebsd-stable@freebsd.org From: "Marat N.Afanasyev" Subject: iostat and fusefs Message-ID: <99ba594d-03bf-2d5d-dd33-7ad239399729@li.ru> Date: Fri, 3 Mar 2017 20:31:16 +0300 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:49.0) Gecko/20100101 Firefox/49.0 SeaMonkey/2.46 MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="------------ms080101040102090400050903" Authentication-Results: smtp29.i.mail.ru; auth=pass smtp.auth=amarat@li.ru smtp.mailfrom=amarat@li.ru X-7FA49CB5: 0D63561A33F958A559F2540A1C36A15E21ACAF057337EBDCF8DA61E7404150649F18ECD7E95F35E929AFE063DF4C541CF463F914DF7610B012479ED34334DD8B0BF2EBBBDD9D6B0FB14D6A2BAF581BDFBDAD6C7F3747799A X-Mailru-Sender: 9880D4BADB750DDB106DCB8B627E51B7BCB41EFD2EBBF8F4A5068BC8F78DE477906C06D823840E0B7D4D5372EC3A0C1DC77752E0C033A69ED9772CD210233664E7FF0ACF69979172344D0B6F51A8929E0DA7A0AF5A3A8387 X-Mras: OK X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.23 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, 03 Mar 2017 21:33:41 -0000 This is a cryptographically signed message in MIME format. --------------ms080101040102090400050903 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable hello! I've accidently ran iostat while write to fuse filesystem was in=20 progress and was shocked when I've seen that, according to iostat, each=20 and any write op to fuse fs leads to one read op. i.e. if I have ~100=20 write op/s to fuse then I have exatcly ~100 read op/s from the same=20 fuse. Is this a bug in iostat or in fuse? da2: Removable Direct Access SPC-4 SCSI devic= e # mount.exfat /dev/da2s1 /mnt/1 FUSE exfat 1.2.4 # dd if=3D/dev/zero of=3D/mnt/1/test1280m.fil bs=3D1m count=3D1280 ^C179+0 records in 178+0 records out 186646528 bytes transferred in 29.778425 secs (6267844 bytes/sec) # iostat -xzdw10 da2 extended device statistics device r/s w/s kr/s kw/s ms/r ms/w ms/o ms/t qlen=20 %b da2 79 79 5068.7 5075.1 3 11 0 7 1 = 78 extended device statistics device r/s w/s kr/s kw/s ms/r ms/w ms/o ms/t qlen=20 %b da2 99 99 6373.4 6392.5 3 11 0 7 0 = 95 extended device statistics device r/s w/s kr/s kw/s ms/r ms/w ms/o ms/t qlen=20 %b da2 95 95 6118.5 6092.9 3 11 0 7 2 = 95 extended device statistics device r/s w/s kr/s kw/s ms/r ms/w ms/o ms/t qlen=20 %b da2 12 12 793.6 793.6 3 14 0 8 0 = 15 the same can be seen if I use ntfs-3g no other app is using da2. --=20 SY, Marat --------------ms080101040102090400050903 Content-Type: application/pkcs7-signature; name="smime.p7s" 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