From nobody Sun Jan 1 17:52:20 2023 X-Original-To: freebsd-hackers@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 4NlRR93l5Cz2lN8L for ; Sun, 1 Jan 2023 17:52:37 +0000 (UTC) (envelope-from george+freebsd@m5p.com) Received: from mailhost.m5p.com (mailhost.m5p.com [74.104.188.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "m5p.com", Issuer "R3" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4NlRR833m8z3Q9M for ; Sun, 1 Jan 2023 17:52:36 +0000 (UTC) (envelope-from george+freebsd@m5p.com) Authentication-Results: mx1.freebsd.org; dkim=none; spf=pass (mx1.freebsd.org: domain of george+freebsd@m5p.com designates 74.104.188.4 as permitted sender) smtp.mailfrom=george+freebsd@m5p.com; dmarc=none Received: from [IPV6:2001:470:1f07:15ff::26] (court.m5p.com [IPv6:2001:470:1f07:15ff:0:0:0:26]) (authenticated bits=0) by mailhost.m5p.com (8.16.1/8.15.2) with ESMTPSA id 301HqKQI033889 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO) for ; Sun, 1 Jan 2023 12:52:26 -0500 (EST) (envelope-from george+freebsd@m5p.com) Message-ID: Date: Sun, 1 Jan 2023 12:52:20 -0500 List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@freebsd.org MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:102.0) Gecko/20100101 Thunderbird/102.4.0 Content-Language: en-US To: FreeBSD Hackers From: George Mitchell Subject: What is "zio->i"? Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=0.0 required=10.0 tests=HELO_NO_DOMAIN autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on mattapan.m5p.com X-Spamd-Result: default: False [-2.30 / 15.00]; SUBJECT_ENDS_QUESTION(1.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-1.00)[-0.998]; R_SPF_ALLOW(-0.20)[+a]; MIME_GOOD(-0.10)[text/plain]; MLMMJ_DEST(0.00)[freebsd-hackers@FreeBSD.org]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; FROM_EQ_ENVFROM(0.00)[]; ASN(0.00)[asn:701, ipnet:74.104.0.0/16, country:US]; TO_DN_ALL(0.00)[]; DMARC_NA(0.00)[m5p.com]; RCPT_COUNT_ONE(0.00)[1]; FROM_HAS_DN(0.00)[]; RCVD_TLS_ALL(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; MID_RHS_MATCH_FROM(0.00)[]; ARC_NA(0.00)[]; TAGGED_FROM(0.00)[freebsd] X-Rspamd-Queue-Id: 4NlRR833m8z3Q9M X-Spamd-Bar: -- X-ThisMailContainsUnwantedMimeParts: N FreeBSD 13.1-RELEASE-p5, using SCHED_4BSD. What is "top" telling me when a process is in "zio->i" state? Every so often, either firefox or thunderbird seemingly sits there contemplating its own navel in that state for up to a minute or two. It recovers of its own accord, of course, but I wish I knew what it meant. Just a few months ago, I moved my /usr partition from UFS to ZFS, saving myself some fsck aggravation (rarely necessary, but very slow when needed). "top" also reports some pretty big ARC numbers -- specifically, bigger than free memory, but not big enough to consume any swap space: Mem: 1232M Active, 1577M Inact, 27M Laundry, 2675M Wired, 175M Buf, 317M Free ARC: 1823M Total, 283M MFU, 1515M MRU, 16K Anon, 5117K Header, 13M Other 1712M Compressed, 2135M Uncompressed, 1.25:1 Ratio Swap: 8192M Total, 8192M Free -- George