Date: Mon, 8 Oct 2018 13:07:54 -0700 From: Mark Millard <marklmi@yahoo.com> To: Greg V <greg@unrelenting.technology> Cc: freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: FYI: I finally got FreeBSD 12 booted under qemu/kvm with general Ethernet access (on a MACCHIATObin running linux) Message-ID: <89370727-44EB-40AD-A8B7-4D3AA823BB8A@yahoo.com> In-Reply-To: <1539026814.3199.2@smtp.migadu.com> References: <F52711CD-048D-4820-9883-0A60475BD688@yahoo.com> <1539024068.3199.1@smtp.migadu.com> <6D5D6E6E-CD6D-4DD7-ABBB-FB9D46FA1D84@yahoo.com> <1539026814.3199.2@smtp.migadu.com>
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On 2018-Oct-8, at 12:26 PM, Greg V <greg at unrelenting.technology> = wrote: > On Mon, Oct 8, 2018 at 10:14 PM, Mark Millard <marklmi at yahoo.com> = wrote: >> On 2018-Oct-8, at 11:41 AM, Greg V <greg at unrelenting.technology> = wrote: >>> On Sun, Oct 7, 2018 at 10:14 PM, Mark Millard via freebsd-arm = <freebsd-arm at freebsd.org> wrote: >>>> Unfortunately, like every past attempt at such where I used >>>> -cpu host, -smp, and -enable-kvm on a few Linux-booted systems >>>> where I've tried such, processes are subject to occasional, random >>>> illegal instruction and segmentation fault program crashes. (The >>>> host linux has no such problems.) True even before getting Ethernet >>>> access working in FreeBSD. >>> Hmmmm, I never saw any program crashes on Scaleway's KVM VPS = (ThunderX hardware), but I have awfully slow storage performance. >>> How fast is the disk on your KVM setup? >> I've only booted linux via a microsd card so far, >> a Class A1 SanDisk Ultra. I've not planned on >> putting linux on the fast media that I hope >> to put FreeBSD on and boot from someday. As >> stands, I do not have spare fast media for the >> MACCHIATObin. >=20 > Surely QEMU/KVM supports booting from bare metal hard disks (not = files), so you could put FreeBSD on the disk you want to eventually boot = directly from, and initially try it under KVM. I actually had a setup = where I would boot the same FreeBSD disk on my desktop both directly on = metal and under Hyper-V :) I do that under Hyper-V (Windows 10 Pro) and directly. But linux/qemu/kvm is effectively new to me and everything is exploratory. I may get there. > But anyway, I think you'd notice the difference even on microSD. > The performance on the VPS is *that* bad. >=20 At some point I may be I can run something like: iozone -a -a0 -a1 -a2 -e -I for you and supply some of the output (from a run that does not crash first). The -e and -I tend to avoid measuring oeprations that have not (yet) gone to the storage media or are just in cache. =3D=3D=3D Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar)
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