Yes, of course !
ns1# sysctl kern.timecounter
kern.timecounter.tick=1
kern.timecounter.timestepwarnings=0
kern.timecounter.hardware=pvclock0
kern.timecounter.choice=i8254(0) pvclock0(1500) tsc(-1000)
occam# dmesg
OpenBSD 7.8 (GENERIC.MP) #54: Sun Oct 12 12:58:11 MDT 2025
[email protected]:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 4259946496 (4062MB)
avail mem = 4104167424 (3914MB)
random: good seed from bootblocks
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.7 @ 0xcfe9b020 (7 entries)
bios0: vendor coreboot version "v4.8.0.3" date 20180708
bios0: PC Engines apu4
acpi0 at bios0: ACPI 4.0
acpi0: sleep states S0 S1 S4 S5
acpi0: tables DSDT FACP SSDT TCPA APIC HEST IVRS SSDT SSDT HPET
acpi0: wakeup devices PWRB(S4) PBR4(S4) PBR5(S4) PBR6(S4) PBR7(S4) PBR8(S4)
UOH1(S3) UOH2(S3) UOH3(S3) UOH4(S3) UOH5(S3) UOH6(S3) XHC0(S4)
acpitimer0 at acpi0: 3579545 Hz, 32 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: AMD GX-412TC SOC, 998.30 MHz, 16-30-01, patch 07030105
cpu0: cpuid 1
edx=178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT>
ecx=36d8220b<SSE3,PCLMUL,MWAIT,SSSE3,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F16C>
cpu0: cpuid 6 eax=4<ARAT> ecx=1<EFFFREQ>
cpu0: cpuid 7.0 ebx=8<BMI1>
cpu0: cpuid d.1 eax=1<XSAVEOPT>
cpu0: cpuid 80000001 edx=2fd3fbff<NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG>
ecx=1d4037ff<LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,SKINIT,TOPEXT,DBKP,PERFTSC,PCTRL3>
cpu0: cpuid 80000007 edx=33d9<HWPSTATE,ITSC>
cpu0: 32KB 64b/line 8-way D-cache, 32KB 64b/line 2-way I-cache, 2MB 64b/line
16-way L2 cache
cpu0: smt 0, core 0, package 0
mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges
cpu0: apic clock running at 99MHz
cpu0: mwait min=64, max=64, IBE
cpu1 at mainbus0: apid 1 (application processor)
cpu1: AMD GX-412TC SOC, 998.32 MHz, 16-30-01, patch 07030105
cpu1: smt 0, core 1, package 0
cpu2 at mainbus0: apid 2 (application processor)
cpu2: AMD GX-412TC SOC, 998.27 MHz, 16-30-01, patch 07030105
cpu2: smt 0, core 2, package 0
cpu3 at mainbus0: apid 3 (application processor)
cpu3: AMD GX-412TC SOC, 998.31 MHz, 16-30-01, patch 07030105
cpu3: smt 0, core 3, package 0
ioapic0 at mainbus0: apid 4 pa 0xfec00000, version 21, 24 pins
ioapic1 at mainbus0: apid 5 pa 0xfec20000, version 21, 32 pins, remapped
acpihpet0 at acpi0: 14318180 Hz
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus 1 (PBR4)
acpiprt2 at acpi0: bus 2 (PBR5)
acpiprt3 at acpi0: bus 3 (PBR6)
acpiprt4 at acpi0: bus 4 (PBR7)
acpiprt5 at acpi0: bus -1 (PBR8)
acpibtn0 at acpi0: PWRB(wakeup)
acpipci0 at acpi0 PCI0: 0x00000000 0x00000011 0x00000001
acpicmos0 at acpi0
"BOOT0000" at acpi0 not configured
acpicpu0 at acpi0: C2(0@400 io@0x1771), C1(@1 halt!), PSS
acpicpu1 at acpi0: C2(0@400 io@0x1771), C1(@1 halt!), PSS
acpicpu2 at acpi0: C2(0@400 io@0x1771), C1(@1 halt!), PSS
acpicpu3 at acpi0: C2(0@400 io@0x1771), C1(@1 halt!), PSS
cpu0: 998 MHz: speeds: 1000 800 600 MHz
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "AMD 16h Root Complex" rev 0x00
vendor "AMD", unknown product 0x1567 (class system subclass IOMMU, rev 0x00) at
pci0 dev 0 function 2 not configured
pchb1 at pci0 dev 2 function 0 "AMD 16h Host" rev 0x00
ppb0 at pci0 dev 2 function 1 "AMD 16h PCIE" rev 0x00: msi
pci1 at ppb0 bus 1
em0 at pci1 dev 0 function 0 "Intel I211" rev 0x03: msi, address
00:0d:b9:4c:e4:98
ppb1 at pci0 dev 2 function 2 "AMD 16h PCIE" rev 0x00: msi
pci2 at ppb1 bus 2
em1 at pci2 dev 0 function 0 "Intel I211" rev 0x03: msi, address
00:0d:b9:4c:e4:99
ppb2 at pci0 dev 2 function 3 "AMD 16h PCIE" rev 0x00: msi
pci3 at ppb2 bus 3
em2 at pci3 dev 0 function 0 "Intel I211" rev 0x03: msi, address
00:0d:b9:4c:e4:9a
ppb3 at pci0 dev 2 function 4 "AMD 16h PCIE" rev 0x00: msi
pci4 at ppb3 bus 4
em3 at pci4 dev 0 function 0 "Intel I211" rev 0x03: msi, address
00:0d:b9:4c:e4:9b
ccp0 at pci0 dev 8 function 0 "AMD 16h Crypto" rev 0x00
xhci0 at pci0 dev 16 function 0 "AMD Bolton xHCI" rev 0x11: msix, xHCI 1.0
usb0 at xhci0: USB revision 3.0
uhub0 at usb0 configuration 1 interface 0 "AMD xHCI root hub" rev 3.00/1.00
addr 1
ahci0 at pci0 dev 17 function 0 "AMD Hudson-2 SATA" rev 0x39: msi, AHCI 1.3
ahci0: port 0: 6.0Gb/s
scsibus1 at ahci0: 32 targets
sd0 at scsibus1 targ 0 lun 0: <ATA, DOGFISH SSD 512G, S102>
t10.ATA_DOGFISH_SSD_512GB_AA000000000000000619
sd0: 488386MB, 512 bytes/sector, 1000215216 sectors, thin
ehci0 at pci0 dev 19 function 0 "AMD Hudson-2 USB2" rev 0x39: apic 4 int 18
usb1 at ehci0: USB revision 2.0
uhub1 at usb1 configuration 1 interface 0 "AMD EHCI root hub" rev 2.00/1.00
addr 1
piixpm0 at pci0 dev 20 function 0 "AMD Hudson-2 SMBus" rev 0x42: SMI
iic0 at piixpm0
iic1 at piixpm0
pcib0 at pci0 dev 20 function 3 "AMD Hudson-2 LPC" rev 0x11
sdhc0 at pci0 dev 20 function 7 "AMD Bolton SD/MMC" rev 0x01: apic 4 int 16
sdhc0: SDHC 2.00, 50 MHz base clock
sdmmc0 at sdhc0: 4-bit, sd high-speed, mmc high-speed, dma
pchb2 at pci0 dev 24 function 0 "AMD 16h Link Cfg" rev 0x00
pchb3 at pci0 dev 24 function 1 "AMD 16h Address Map" rev 0x00
pchb4 at pci0 dev 24 function 2 "AMD 16h DRAM Cfg" rev 0x00
km0 at pci0 dev 24 function 3 "AMD 16h Misc Cfg" rev 0x00
pchb5 at pci0 dev 24 function 4 "AMD 16h CPU Power" rev 0x00
pchb6 at pci0 dev 24 function 5 "AMD 16h Misc Cfg" rev 0x00
isa0 at pcib0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
com0: console
com1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
com2 at isa0 port 0x3e8/8 irq 5: ns16550a, 16 byte fifo
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
wbsio0 at isa0 port 0x2e/2: NCT5104D rev 0x53
vmm0 at mainbus0: SVM/RVI
uhub2 at uhub1 port 1 configuration 1 interface 0 "Advanced Micro Devices Hub"
rev 2.00/0.18 addr 2
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
root on sd0a (523aa852013c6b76.a) swap on sd0b dump on sd0b
On 06/11/2025 15:17:06, "Dave Voutila" <[email protected]> wrote:
"Arnaud Brand" <[email protected]> writes:
Good morning list,
I run OpenBSD (7.8 now) on a APU4C4 board.
I use vmd to run a small VM to host a DNS server, also running on
OpenBSD 7.8.
This setup worked perfectly fine when I first installed it back in
March 2022 (with OpenBSD 7.0 at the time).
At some point in time ( don't remember when, sorry ) I noticed clock
drift in the VM.
My natural reflex was to setup ntp to keep the clock in sync.
This seemed to do the trick and I forgot about it.
About a year or so ago, I noticed that there was still some clock
drift and that ntp was not able to prevent it.
I read on the web that the VM was supposed to use pvclock to stay in
sync with the host and ntp might be counterproductive.
So I removed ntp on the VM.
This didn't fix the problem though.
I recently upgraded both the host and the VM to 7.8 and syspatched them.
The problem still occurs.
When it occurs, I can no longer login to the VM via SSH.
So to dig deeper, I left a console session open on the VM via a tmux
session.
This console session stays open and I can issue commands, but the
clock is frozen.
I tried to generate a sendbug by using "sendbug -P > file".
I get an error :
cp: /var/db/acpi/*: No such file or directory
b64encode: *: No such file or directory
The file gets generated though.
I see nothing new in the dmesg, nothing in /var/log/daemon, nothing in
/var/log/messages.
What can I look at ?
Where can I look ?
What did I miss ?
Thanks for your help !
Can you share a dmesg of the host machine and the output of `sysctl
kern.timecounter` in the guest vm?
-dv
