From nobody Tue Feb 27 20:03:11 2024 X-Original-To: freebsd-stable@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4TkpMN2drzz5CL9D for ; Tue, 27 Feb 2024 20:03:28 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from mail.rdtc.ru (mail.rdtc.ru [62.231.190.2]) (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 4TkpMM57Qmz3xJH for ; Tue, 27 Feb 2024 20:03:27 +0000 (UTC) (envelope-from eugen@grosbein.net) Authentication-Results: mx1.freebsd.org; none Received: by mail.rdtc.ru (RDTC Post Office Server, from userid 1000) id 0180C1CF49; Wed, 28 Feb 2024 03:03:17 +0700 (+07) Received: from eg.sd.rdtc.ru (eg.sd.rdtc.ru [62.231.161.221]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: egrosbein@rdtc.ru) by mail.rdtc.ru (RDTC Post Office Server) with ESMTPSA id 3D9311CF47 for ; Wed, 28 Feb 2024 03:03:17 +0700 (+07) X-Envelope-From: eugen@grosbein.net X-Envelope-To: freebsd-stable@freebsd.org Received: from [10.58.0.10] (dadvw [10.58.0.10]) by eg.sd.rdtc.ru (8.17.1/8.17.1) with ESMTPS id 41RK3DNL072668 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Wed, 28 Feb 2024 03:03:13 +0700 (+07) (envelope-from eugen@grosbein.net) Subject: Re: 13-STABLE high idprio load gives poor responsiveness and excessive CPU time per task To: "Edward Sanford Sutton, III" , freebsd-stable@freebsd.org References: From: Eugene Grosbein Message-ID: <8de04b21-f1cb-8dcc-9d2c-218cebea7c4e@grosbein.net> Date: Wed, 28 Feb 2024 03:03:11 +0700 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 List-Id: Production branch of FreeBSD source code List-Archive: https://lists.freebsd.org/archives/freebsd-stable List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-stable@freebsd.org X-BeenThere: freebsd-stable@freebsd.org MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-0.2 required=5.0 tests=BAYES_00,HELO_MISC_IP, LOCAL_FROM,NICE_REPLY_A,SPF_PASS,T_DATE_IN_FUTURE_96_Q, T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=4.0.0 X-Spam-Report: * -0.0 SPF_PASS SPF: sender matches SPF record * -2.3 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * 0.0 T_DATE_IN_FUTURE_96_Q Date: is 4 days to 4 months after Received: * date * 2.6 LOCAL_FROM From my domains * -0.0 T_SCC_BODY_TEXT_LINE No description available. * -1.6 NICE_REPLY_A Looks like a legit reply (A) * 1.1 HELO_MISC_IP Looking for more Dynamic IP Relays X-Spam-Checker-Version: SpamAssassin 4.0.0 (2022-12-14) on eg.sd.rdtc.ru X-Spamd-Bar: ---- X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:29072, ipnet:62.231.184.0/21, country:RU] X-Rspamd-Queue-Id: 4TkpMM57Qmz3xJH 27.02.2024 7:24, Edward Sanford Sutton, III wrote: [skip] > More recently looked and see top showing threads+system processes shows > I have one core getting 100% cpu for kernel{arc_prune} which has 21.2 hours over a 2 hour 23 minute uptime. Against this bug, try these two: sysctl vfs.zfs.arc.meta_strategy=0 sysctl vfs.zfs.arc.meta_limit_percent=25 Note that in 14.0 ZFS changed a lot and no more has sysctl vfs.zfs.arc.meta_strategy, also it did not exist in FreeBSD 12.x, too. Eugene Grosbein