Re: Running Windows inside vmm/vmd VM.
On Sat, Nov 23, 2019 at 12:18 AM Jordan Geoghegan wrote: > > However the timekeeping situation for my Linux VMs is bleak. On both > Void and Alpine, no clocks are even detected. In the dmesg it complains > about the TSC clock source being unstable. Ultimately, we're left with > only jiffies as a clock source option: Anecdotally, I've found distros using Linux kernels in the 4.9-4.14 range do ok in letting you force tsc even if it says it's unstable. Newer kernels often have a myriad of issues booting. (Might not be kernel related so much as just all the other stuff that changes around it.) If you experience either slight, chronic drift or drift related to the OpenBSD host suspending/resuming after long periods of time, I wrote a Linux kernel driver that mimics OpenBSD's vmmci(4) that may help: https://github.com/voutilad/virtio_vmmci The driver listens for notifications from vmd about clock drift events and use kernel api calls to adjust as needed, properly triggering anything scheduled. An added nicety is it'll also listen for shutdown/reboot events as well and try to cleanly reboot or halt the system via whatever init system the Linux guest uses, meaning services should have a chance to stop themselves. -Dave
Re: Running Windows inside vmm/vmd VM.
On 2019-11-22 19:53, Jes wrote: On Fri Nov 22, 2019 at 9:04 PM Dumitru Moldovan wrote: Supported guest operating systems are currently limited to OpenBSD and Linux. As there is no VGA support yet, the guest OS must support serial console. Speaking of this, does anyone here have any experience running Linux VMs on vmm/vmd? I threw Alpine/Debian installs together recently and they seemed to work well. Looking for anyone with longer-term experience as I'm interested in setting up a VPS hosting service on vmm/vmd, and would appreciate any advice or anecdotes. I have some Alpine and Void Linux installs running on vmm. They work well, with some caveats. You may have issues with your VMs clocks. OpenBSD guests in vmm are now able to use the pvclock driver, which has greatly improved time keeping on my VMs, although I still do have some erratic clock jumping, but at least it's not so bad that ntpd can't keep up with it. However the timekeeping situation for my Linux VMs is bleak. On both Void and Alpine, no clocks are even detected. In the dmesg it complains about the TSC clock source being unstable. Ultimately, we're left with only jiffies as a clock source option: void$ cat /sys/devices/system/clocksource/clocksource0/available_clocksource refined-jiffies jiffies As a result, my clocks run at about one third of real time. I've tried the Linux VM's on both an old Xeon machine as well as a modern Ryzen machine, and the clock situation seems to be equally bad on both of them. ... Clock issues aside, I've found Linux guests to get better networking throughput on vmm than OpenBSD guests. A few results from benchmarking Alpine vs Void vs OBSD, with iperf3: (vmm host is older xeon rig, iperf3 tester is ryzen desktop) Alpine got this result: [ ID] Interval Transfer Bitrate [ 5] 0.00-10.00 sec 511 MBytes 429 Mbits/sec sender [ 5] 0.00-8.60 sec 511 MBytes 499 Mbits/sec receiver Void Linux Got this result: [ ID] Interval Transfer Bitrate [ 5] 0.00-10.00 sec 611 MBytes 512 Mbits/sec sender [ 5] 0.00-7.00 sec 610 MBytes 732 Mbits/sec receiver And OpenBSD got this result: [ ID] Interval Transfer Bitrate [ 5] 0.00-10.00 sec 299 MBytes 251 Mbits/sec sender [ 5] 0.00-10.19 sec 299 MBytes 246 Mbits/sec receiver Because folks always freak out when tcpbench is forgotten about, I tested tcpbench as well between the two machines running OpenBSD: Peak Mbps: 231.240 Avg Mbps: 204.423 I know that was some very unscientific testing, but hey, you asked for anecdotes. Cheers, Jordan
Re: Running Windows inside vmm/vmd VM.
On Fri Nov 22, 2019 at 9:04 PM Dumitru Moldovan wrote: > Supported guest operating systems are currently limited to OpenBSD and > Linux. As there is no VGA support yet, the guest OS must support serial > console. Speaking of this, does anyone here have any experience running Linux VMs on vmm/vmd? I threw Alpine/Debian installs together recently and they seemed to work well. Looking for anyone with longer-term experience as I'm interested in setting up a VPS hosting service on vmm/vmd, and would appreciate any advice or anecdotes.
Re: Running Windows inside vmm/vmd VM.
On Fri, Nov 22, 2019 at 07:42:39PM +0100, Karel Gardas wrote: not sure what's current status of vmm/vmd hence asking. Has anybody succeed with running Windows 10/Server 2019 inside the vmm/vmd VM? From https://www.openbsd.org/faq/faq16.html#Introduction: Supported guest operating systems are currently limited to OpenBSD and Linux. As there is no VGA support yet, the guest OS must support serial console.
Running Windows inside vmm/vmd VM.
Hello, not sure what's current status of vmm/vmd hence asking. Has anybody succeed with running Windows 10/Server 2019 inside the vmm/vmd VM? Thanks! Karel
