From nobody Wed Jul 23 21:55:28 2025 X-Original-To: freebsd-virtualization@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 4bnScR6YZRz633Kk for ; Wed, 23 Jul 2025 21:55:35 +0000 (UTC) (envelope-from xyzzy@sysabend.org) Received: from moo.sysabend.org (moo.sysabend.org [74.116.249.130]) by mx1.freebsd.org (Postfix) with ESMTP id 4bnScQ4ZTWz3PPt for ; Wed, 23 Jul 2025 21:55:34 +0000 (UTC) (envelope-from xyzzy@sysabend.org) Authentication-Results: mx1.freebsd.org; dkim=none; spf=pass (mx1.freebsd.org: domain of xyzzy@sysabend.org designates 74.116.249.130 as permitted sender) smtp.mailfrom=xyzzy@sysabend.org; dmarc=none Received: by moo.sysabend.org (Postfix, from userid 1001) id 57A99137DB; Wed, 23 Jul 2025 14:55:28 -0700 (PDT) Date: Wed, 23 Jul 2025 14:55:28 -0700 From: Tom Arnold To: freebsd-virtualization@freebsd.org Subject: Re: Running FreeBSD 14.3 under XCP-NG performance issues Message-ID: <20250723215528.GC73473@moo.sysabend.org> Reply-To: xyzzy@sysabend.org References: <20250722210611.GC27456@moo.sysabend.org> <8533E4AC-3B62-47EC-91D1-4EFB8767B241@ultra-secure.de> List-Id: Discussion List-Archive: https://lists.freebsd.org/archives/freebsd-virtualization List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: freebsd-virtualization@freebsd.org Sender: owner-freebsd-virtualization@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8533E4AC-3B62-47EC-91D1-4EFB8767B241@ultra-secure.de> Organization: The Sysabend Dump X-Operating-System: CPM2.2 User-Agent: Mutt/1.10.1 (2018-07-13) X-Spamd-Result: default: False [1.01 / 15.00]; NEURAL_SPAM_LONG(1.00)[1.000]; NEURAL_SPAM_MEDIUM(0.98)[0.976]; NEURAL_HAM_SHORT(-0.97)[-0.966]; R_SPF_ALLOW(-0.20)[+ip4:74.116.249.128/29]; ONCE_RECEIVED(0.20)[]; MIME_GOOD(-0.10)[text/plain]; RCVD_NO_TLS_LAST(0.10)[]; RCVD_COUNT_ONE(0.00)[1]; ARC_NA(0.00)[]; HAS_ORG_HEADER(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:40475, ipnet:74.116.248.0/22, country:US]; RCPT_COUNT_ONE(0.00)[1]; MLMMJ_DEST(0.00)[freebsd-virtualization@freebsd.org]; HAS_REPLYTO(0.00)[xyzzy@sysabend.org]; REPLYTO_ADDR_EQ_FROM(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; R_DKIM_NA(0.00)[]; TO_DN_NONE(0.00)[]; DMARC_NA(0.00)[sysabend.org]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MID_RHS_MATCH_FROMTLD(0.00)[]; REPLYTO_DOM_NEQ_TO_DOM(0.00)[] X-Rspamd-Queue-Id: 4bnScQ4ZTWz3PPt X-Spamd-Bar: + On Wed, Jul 23, 2025 at 11:21:35PM +0200, Rainer Duffner wrote: > XCP-NG is Xen, right? Yes. > Many, many years ago, I had similar problems with XenServer and FreeBSD. > > I opened a PR or two but nothing ever came out of it (you can find them > > We switched to KVM with Openstack and the problem was more or less the same - until about FreeBSD 14.2, when I seemed to see a remarkable performance-increase - though I haven???t benchmarked it. I'm finding it really weird that disk block devices that don't show up in the xenbus tree are twice as fast as those that do. I'm reading sourcecode now for lack of other documentation... -Tom -- -------------------------------------------------------------------- - Tom Arnold - "...is it a virus, a drug, or a religion?" - Sysabend Caretaker - Juanita Shrugs. "What's the difference?" ------------------------ -- Neal Stephenson, Snow Crash