From owner-freebsd-virtualization@freebsd.org Wed May 19 02:45:52 2021 Return-Path: Delivered-To: freebsd-virtualization@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id E2F0D635837 for ; Wed, 19 May 2021 02:45:52 +0000 (UTC) (envelope-from bsdlists@jld3.net) Received: from mail.jld3.net (mail.jld3.net [45.55.236.93]) (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 4FlHL74rbbz4W8R for ; Wed, 19 May 2021 02:45:51 +0000 (UTC) (envelope-from bsdlists@jld3.net) Received: from localhost (localhost [127.0.0.1]) by mail.jld3.net (Postfix) with ESMTP id 9C382415A2; Tue, 18 May 2021 20:45:50 -0600 (MDT) X-Virus-Scanned: amavisd-new at jld3.net Received: from mail.jld3.net ([127.0.0.1]) by localhost (mail.jld3.net [127.0.0.1]) (amavisd-new, port 10024) with LMTP id dZ-LfmkUYFQG; Tue, 18 May 2021 20:45:50 -0600 (MDT) Received: from [172.21.35.202] (c-24-9-144-115.hsd1.co.comcast.net [24.9.144.115]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: jld) by mail.jld3.net (Postfix) with ESMTPSA id E327C40573; Tue, 18 May 2021 20:45:48 -0600 (MDT) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.jld3.net E327C40573 DKIM-Filter: OpenDKIM Filter v2.11.0 mail.jld3.net E327C40573 From: "John Doherty" To: "Rodney W. Grimes" Cc: freebsd-virtualization@freebsd.org Subject: Re: increasing bhyve VM_MAXCPU Date: Tue, 18 May 2021 20:45:42 -0600 X-Mailer: MailMate (1.13.2r5673) Message-ID: <13804A0B-E22F-4C02-BFFF-2C1EFF214EC3@jld3.net> In-Reply-To: <202105190121.14J1L3BV001126@gndrsh.dnsmgr.net> References: <202105190121.14J1L3BV001126@gndrsh.dnsmgr.net> MIME-Version: 1.0 Content-Type: text/plain X-Rspamd-Queue-Id: 4FlHL74rbbz4W8R X-Spamd-Bar: --- X-Spamd-Result: default: False [-3.96 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; RBL_DBL_DONT_QUERY_IPS(0.00)[45.55.236.93:from]; R_DKIM_ALLOW(-0.20)[jld3.net:s=8d052f02dde2]; ARC_NA(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+mx]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; NEURAL_HAM_MEDIUM(-0.96)[-0.961]; SPAMHAUS_ZRD(0.00)[45.55.236.93:from:127.0.2.255]; RCVD_COUNT_THREE(0.00)[4]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[jld3.net:+]; RCPT_COUNT_TWO(0.00)[2]; DMARC_POLICY_ALLOW(-0.50)[jld3.net,quarantine]; NEURAL_HAM_SHORT(-1.00)[-1.000]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:14061, ipnet:45.55.192.0/18, country:US]; MID_RHS_MATCH_FROM(0.00)[]; MAILMAN_DEST(0.00)[freebsd-virtualization]; RECEIVED_SPAMHAUS_PBL(0.00)[24.9.144.115:received] X-BeenThere: freebsd-virtualization@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: "Discussion of various virtualization techniques FreeBSD supports." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 19 May 2021 02:45:52 -0000 On 18 May 2021, at 19:21, Rodney W. Grimes wrote: >> I'm experimenting with bhyve VMs with more than 16 vCPUs on FreeBSD >> I began working on a machine with only eight CPU cores/threads, so >> rather than trying to increase VM_MAXCPU, I tried to decrease it, which >> seemed to work fine. My procedure was: >> >> edit /usr/src/sys/amd64/include/vmm.h > > cp /usr/src/sys/amd64/include/vmm.h /usr/include/machine/vmm.h Thanks so much for this. Things are now working fine, e.g.: [root@fbsd1] # grep 'Multiprocessor System Detected' /var/run/dmesg.boot FreeBSD/SMP: Multiprocessor System Detected: 24 CPUs