From nobody Thu Jan 11 03:04:51 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 4T9Tzy27xqz55vFD for ; Thu, 11 Jan 2024 03:05:02 +0000 (UTC) (envelope-from wollman@hergotha.csail.mit.edu) Received: from hergotha.csail.mit.edu (tunnel82308-pt.tunnel.tserv4.nyc4.ipv6.he.net [IPv6:2001:470:1f06:ccb::2]) (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 "garrett.wollman.name", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4T9Tzx2L1Pz4jTT for ; Thu, 11 Jan 2024 03:05:01 +0000 (UTC) (envelope-from wollman@hergotha.csail.mit.edu) Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=bimajority.org (policy=none); spf=pass (mx1.freebsd.org: domain of wollman@hergotha.csail.mit.edu designates 2001:470:1f06:ccb::2 as permitted sender) smtp.mailfrom=wollman@hergotha.csail.mit.edu Received: from hergotha.csail.mit.edu (localhost [127.0.0.1]) by hergotha.csail.mit.edu (8.17.1/8.17.1) with ESMTPS id 40B34rst003632 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Wed, 10 Jan 2024 22:04:53 -0500 (EST) (envelope-from wollman@hergotha.csail.mit.edu) Received: (from wollman@localhost) by hergotha.csail.mit.edu (8.17.1/8.17.1/Submit) id 40B34qfH003631; Wed, 10 Jan 2024 22:04:52 -0500 (EST) (envelope-from wollman) 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 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <26015.23251.994177.437150@hergotha.csail.mit.edu> Date: Wed, 10 Jan 2024 22:04:51 -0500 From: Garrett Wollman To: "Patrick M. Hausen" Cc: FreeBSD-STABLE Mailing List Subject: Re: Odd values for various memory metrics via SNMP In-Reply-To: References: <1EDAF2AC-3A2B-43BE-B66B-E095F5A80C2C@punkt.de> <84B7C7D7-BC06-4944-A7E0-5AFC47B6BC0E@punkt.de> <8f4cf72e-8320-4bfd-a4d9-3db34db4580d@aetern.org> <25996.34932.339497.605798@hergotha.csail.mit.edu> X-Mailer: VM 8.2.0b under 29.1 (amd64-portbld-freebsd13.2) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.4 (hergotha.csail.mit.edu [0.0.0.0]); Wed, 10 Jan 2024 22:04:53 -0500 (EST) X-Spam-Status: No, score=-4.5 required=5.0 tests=ALL_TRUSTED, HEADER_FROM_DIFFERENT_DOMAINS,NICE_REPLY_A,T_SCC_BODY_TEXT_LINE autolearn=disabled version=4.0.0 X-Spam-Checker-Version: SpamAssassin 4.0.0 (2022-12-14) on hergotha.csail.mit.edu X-Spamd-Bar: -- X-Spamd-Result: default: False [-2.89 / 15.00]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.99)[-0.992]; FORGED_SENDER(0.30)[wollman@bimajority.org,wollman@hergotha.csail.mit.edu]; R_SPF_ALLOW(-0.20)[+ip6:2001:470:1f06:ccb::2]; DMARC_POLICY_SOFTFAIL(0.10)[bimajority.org : SPF not aligned (relaxed), No valid DKIM,none]; MIME_GOOD(-0.10)[text/plain]; FROM_HAS_DN(0.00)[]; FREEFALL_USER(0.00)[wollman]; ASN(0.00)[asn:6939, ipnet:2001:470::/32, country:US]; MIME_TRACE(0.00)[0:+]; RCPT_COUNT_TWO(0.00)[2]; MLMMJ_DEST(0.00)[freebsd-stable@freebsd.org]; RCVD_TLS_LAST(0.00)[]; FROM_NEQ_ENVFROM(0.00)[wollman@bimajority.org,wollman@hergotha.csail.mit.edu]; R_DKIM_NA(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; TO_DN_ALL(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; ARC_NA(0.00)[] X-Rspamd-Queue-Id: 4T9Tzx2L1Pz4jTT < said: >> [I wrote:] >> This is computed by the function vmtotal() in sys/vm/vm_meter.c. It >> walks all VM objects in the system, skipping those that are >> unreferenced, and adds up all of their sizes. >> [...] > Why does FreeBSD calculate the values this way while MWL's book clearly > states differently? Who's wrong here? I cannot speak for Michael Lucas. FreeBSD has ~always calculated VM statistics in this way; the same algorithm was in 4.4BSD, thirty years ago. -GAWollman