From owner-freebsd-virtualization@freebsd.org Fri Sep 28 14:54:43 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 B7B4C10B2C0C for ; Fri, 28 Sep 2018 14:54:43 +0000 (UTC) (envelope-from hicks@cgi.cz) Received: from bsd.cgi.cz (bsd.cgi.cz [178.238.45.112]) (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 52299763E0 for ; Fri, 28 Sep 2018 14:54:43 +0000 (UTC) (envelope-from hicks@cgi.cz) Received: from hel.cgi.cz (hel [192.168.66.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by bsd.cgi.cz (Postfix) with ESMTPS id 5E6A323CF8D for ; Fri, 28 Sep 2018 17:13:26 +0200 (CEST) Received: from localhost (unknown [192.168.66.11]) by hel.cgi.cz (Postfix) with ESMTP id 3254014DD19 for ; Fri, 28 Sep 2018 16:47:46 +0200 (CEST) Received: from hel.cgi.cz ([192.168.66.6]) by localhost (antispam1.cgi.cz [192.168.66.11]) (amavisd-new, port 10024) with LMTP id dID0v9QUbAUe for ; Fri, 28 Sep 2018 16:47:08 +0200 (CEST) Received: from mail2.cgi.cz (hermes [172.17.174.1]) (using TLSv1 with cipher ADH-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by hel.cgi.cz (Postfix) with ESMTPS id C39F214DCE5 for ; Fri, 28 Sep 2018 16:47:43 +0200 (CEST) Received: from [192.168.8.136] (unknown [82.100.31.11]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by mail2.cgi.cz (Postfix) with ESMTPSA id A87D2846C7 for ; Fri, 28 Sep 2018 16:47:43 +0200 (CEST) Subject: Re: New bhyve user To: "freebsd-virtua." References: <2edf93d1-58c2-92bc-48e2-92a493a36e7e@druid.net> <2a95db911caf43afba6408423597533c@SERVER.ad.usd-group.com> <54298eaf-dcc1-fffb-fb01-1519eac7bd72@ghislain.net> From: Jakub Chromy Message-ID: <60055d7f-c378-7242-5bd5-7f5b60779b61@cgi.cz> Date: Fri, 28 Sep 2018 16:47:07 +0200 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: <54298eaf-dcc1-fffb-fb01-1519eac7bd72@ghislain.net> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-GB X-BeenThere: freebsd-virtualization@freebsd.org X-Mailman-Version: 2.1.27 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: Fri, 28 Sep 2018 14:54:43 -0000 > >  So if one guest launch a lot of cpu hungry thread it could "starve" > the others guests with less thread usgin cpu time. As far as what I heard here on this forum, you should NOT overcommit the vCPUs. When you keep the number of vCPUs assigned to your vms lower than physical CPUs (= hyperthreaded cores), you should be fine. -- regards Jakub Chromy CGI Systems div. ---------------- CGI CZ s.r.o. sales@cgi.cz 775 144 257 234 697 102 www.cgi.cz > >  So if one guest launch a lot of cpu hungry thread it could "starve" > the others guests with less thread usgin cpu time. > > Correct me if i read that wrong :) > > Ghislain. > _______________________________________________ > freebsd-virtualization@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-virtualization > To unsubscribe, send any mail to > "freebsd-virtualization-unsubscribe@freebsd.org"