From owner-freebsd-virtualization@freebsd.org Tue Nov 6 17:25:49 2018 Return-Path: Delivered-To: freebsd-virtualization@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 5A21F112AACD for ; Tue, 6 Nov 2018 17:25:49 +0000 (UTC) (envelope-from tech-lists@zyxst.net) Received: from potato.growveg.org (potato.growveg.org [82.70.91.100]) (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 0E4D7816D9 for ; Tue, 6 Nov 2018 17:25:46 +0000 (UTC) (envelope-from tech-lists@zyxst.net) Received: from parsley.growveg.org ([82.70.91.97] helo=desktop.local) by potato.growveg.org with esmtp (Exim 4.91 (FreeBSD)) (envelope-from ) id 1gK56g-0000bY-8Z for freebsd-virtualization@freebsd.org; Tue, 06 Nov 2018 17:25:38 +0000 Date: Tue, 6 Nov 2018 17:25:35 +0000 From: tech-lists To: freebsd-virtualization@freebsd.org Subject: is there a vCPU hard limit for bhyve guests? Message-ID: <20181106172535.20e46ef6@desktop.local> Organization: zyxst.net X-Mailer: Claws Mail 3.16.0 (GTK+ 2.24.32; amd64-portbld-freebsd12.0) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 0E4D7816D9 X-Spamd-Result: default: False [2.12 / 200.00]; ARC_NA(0.00)[]; R_SPF_NEUTRAL(0.00)[?all]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_SPAM_SHORT(0.27)[0.265,0]; MIME_GOOD(-0.10)[text/plain]; TO_DN_NONE(0.00)[]; DMARC_NA(0.00)[zyxst.net]; NEURAL_SPAM_MEDIUM(0.40)[0.399,0]; RCPT_COUNT_ONE(0.00)[1]; HAS_ORG_HEADER(0.00)[]; RCVD_TLS_LAST(0.00)[]; MX_GOOD(-0.01)[in2-smtp.messagingengine.com,in1-smtp.messagingengine.com,in2-smtp.messagingengine.com,in1-smtp.messagingengine.com,in2-smtp.messagingengine.com,in1-smtp.messagingengine.com,in2-smtp.messagingengine.com,in1-smtp.messagingengine.com,in2-smtp.messagingengine.com,in1-smtp.messagingengine.com,in2-smtp.messagingengine.com,in1-smtp.messagingengine.com]; NEURAL_SPAM_LONG(0.58)[0.583,0]; IP_SCORE(-0.01)[country: GB(-0.07)]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; SUBJECT_ENDS_QUESTION(1.00)[]; ASN(0.00)[asn:13037, ipnet:82.68.0.0/14, country:GB]; RCVD_COUNT_TWO(0.00)[2] X-Rspamd-Server: mx1.freebsd.org X-BeenThere: freebsd-virtualization@freebsd.org X-Mailman-Version: 2.1.29 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: Tue, 06 Nov 2018 17:25:49 -0000 Hi, On a host with hw.ncpu=48 I tried to start a bhyve guest with -c 24 and it failed to start. So I tried -c 16 and it starts and runs as expected. Any more than -c 16 fails to run. Is a maximum of 16 vCPU hardwired somewhere, and if so, why? Is there a way to overcome the limit? thanks, -- J.