Date: Wed, 23 Jul 2025 14:55:28 -0700 From: Tom Arnold <xyzzy@sysabend.org> To: freebsd-virtualization@freebsd.org Subject: Re: Running FreeBSD 14.3 under XCP-NG performance issues Message-ID: <20250723215528.GC73473@moo.sysabend.org> In-Reply-To: <8533E4AC-3B62-47EC-91D1-4EFB8767B241@ultra-secure.de> References: <20250722210611.GC27456@moo.sysabend.org> <8533E4AC-3B62-47EC-91D1-4EFB8767B241@ultra-secure.de>
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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
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