Date: Mon, 13 Jan 2020 15:10:44 +0100 From: Roger Pau =?iso-8859-1?Q?Monn=E9?= <roger.pau@citrix.com> To: Stefan Parvu <sparvu@kronometrix.org> Cc: <freebsd-xen@freebsd.org> Subject: Re: Xen performance on FreeBSD vs Linux Message-ID: <20200113141044.GK11738@Air-de-Roger> In-Reply-To: <74365939-48EF-4BA8-9DDF-6309C4D176FE@kronometrix.org> References: <7E9802F1-172A-41A7-A110-C69A7D8D1192@kronometrix.org> <20200108154104.GE11738@Air-de-Roger> <74365939-48EF-4BA8-9DDF-6309C4D176FE@kronometrix.org>
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On Sun, Jan 12, 2020 at 09:07:32PM +0200, Stefan Parvu wrote: > > > > Also a FreeBSD dom0 can only work in PVH mode, which is faster for > > certain operations like page table modifications, but it's slower for > > others, like issuing hypercalls, when compared to a PV dom0. > > > > I don't have figures at hand now, but guest creation is likely slower > > on a FreeBSD PVH dom0 than on a Linux PV dom0, and that's because > > hypercalls are more expensive on PVH than on PV (has nothing to do > > whether Linux or FreeBSD is used). > > right. thanks a lot for pointers. A bit confusing is that I see mentioned > around that Xen of FreeBSD is experimental. Is this true ? PVH dom0 support in Xen is experimental, the FreeBSD PVH bits are mostly stable and I wouldn't expect many changes there except from bug fixes. The PVH guest ABI is also stable since quite some time ago. Thanks, Roger.
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