From owner-freebsd-dtrace@freebsd.org Mon Dec 10 06:05:23 2018 Return-Path: Delivered-To: freebsd-dtrace@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 0B2151312DFC for ; Mon, 10 Dec 2018 06:05:23 +0000 (UTC) (envelope-from eugene@zhegan.in) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 58B888FB08 for ; Mon, 10 Dec 2018 06:05:22 +0000 (UTC) (envelope-from eugene@zhegan.in) Received: by mailman.ysv.freebsd.org (Postfix) id 127C51312DFB; Mon, 10 Dec 2018 06:05:22 +0000 (UTC) Delivered-To: dtrace@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 00C5E1312DFA for ; Mon, 10 Dec 2018 06:05:22 +0000 (UTC) (envelope-from eugene@zhegan.in) Received: from elf.hq.norma.perm.ru (mail.norma.perm.ru [IPv6:2a00:7540:1::5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mail.norma.perm.ru", Issuer "Vivat-Trade UNIX Root CA" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 7BC428FB07 for ; Mon, 10 Dec 2018 06:05:14 +0000 (UTC) (envelope-from eugene@zhegan.in) Received: from bsdrookie.norma.com. (asterisk.enaza.ru [91.237.76.254] (may be forged)) by elf.hq.norma.perm.ru (8.15.2/8.15.2) with ESMTPS id wBA659br021542 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO) for ; Mon, 10 Dec 2018 11:05:10 +0500 (+05) (envelope-from eugene@zhegan.in) Subject: Re: iotop for iSCSI or zfs datasets To: dtrace@freebsd.org References: <67bc8f0a-8702-c6ee-9d37-3a5064709126@zhegan.in> From: "Eugene M. Zheganin" Message-ID: <5b23c43b-a00f-0703-60e1-00920d5dbe79@zhegan.in> Date: Mon, 10 Dec 2018 11:05:09 +0500 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:52.0) Gecko/20100101 Thunderbird/52.1.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-Rspamd-Scan-Time: 0.46 X-Rspamd-Queue-Id: 58B888FB08 X-Spamd-Result: default: False [-6.67 / 15.00]; ARC_NA(0.00)[]; R_SPF_FAIL(0.00)[-all]; RCVD_COUNT_FIVE(0.00)[5]; FORGED_RECIPIENTS_FORWARDING(0.00)[]; FROM_HAS_DN(0.00)[]; FORWARDED(0.00)[dtrace@mailman.ysv.freebsd.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; TO_DN_NONE(0.00)[]; DMARC_NA(0.00)[zhegan.in]; SPF_FAIL_FORWARDING(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; MX_GOOD(-0.01)[cached: mail-backup.zhegan.in]; RCVD_IN_DNSWL_MED(-0.20)[5.0.0.0.0.5.0.0.0.0.0.0.0.0.0.0.a.6.0.2.4.5.2.2.0.0.9.1.1.0.0.2.list.dnswl.org : 127.0.9.2]; NEURAL_HAM_SHORT(-0.93)[-0.934,0]; RCVD_NO_TLS_LAST(0.10)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; IP_SCORE(-3.53)[ip: (-9.87), ipnet: 2001:1900:2254::/48(-4.49), asn: 10310(-3.19), country: US(-0.09)]; ASN(0.00)[asn:10310, ipnet:2001:1900:2254::/48, country:US]; FORGED_RECIPIENTS(0.00)[dtrace@freebsd.org,freebsd-dtrace@freebsd.org]; MID_RHS_MATCH_FROM(0.00)[] X-Rspamd-Server: mx1.freebsd.org X-BeenThere: freebsd-dtrace@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "A discussion list for developers working on DTrace in FreeBSD." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 10 Dec 2018 06:05:23 -0000 Hello, On 07.12.2018 20:25, Alan Somers wrote: > >> I also can see the iotop in the context of network data transferred >> using trafshow, but this doesn't scale well to iops, and I would see >> reads/writes per second in terms that block devices use. >> >> >> Thanks. >> >> Eugene. > What's wrong with gstat? Use "gstat -a" to suppress idle devices. > -Alan Everything is wrong with gstat in this case. First of all, this is what's wrong - https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=227465 , and gstat required zvols to be volmode=geom to use it this way. Second, volmode=dev is supposed to be more performing. Finally, I find hilarious that first answer in the dtrace@ was "don't use dtrace". Eugene.