On Mon, Nov 19, 2018 at 01:12:46PM +0100, Reyk Floeter wrote:
> Hi,
>
> the attached diff is another attempt at implementing a pvclock(4)
> guest driver. This improves the clock on KVM and replaces the need
> for using the VM-expensive acpihpet(4).
>
> While pvclock(4) is available on KVM, Xen, Hyper-V (in a modified
> form), it currently only attaches under KVM:
>
> pvbus0 at mainbus0: KVM
> pvclock0 at pvbus0
Works fine on my proxmox 5.2 / KVM 2.11 dpb build cluster emulating 6x
"QEMU Standard PC (Q35 + ICH9, 2009)". Before i had to restart ntpd
every 5mn on each hosts, time would drift like crazy under build load.
With pvclock it seems the slave clocks are stable and ntpd stays synced.
kern.timecounter.tick=1
kern.timecounter.timestepwarnings=0
kern.timecounter.hardware=pvclock0
kern.timecounter.choice=i8254(0) pvclock0(1500) acpihpet0(1000)
acpitimer0(1000) dummy(-1000000)
Landry
OpenBSD 6.4-current (GENERIC.MP) #0: Tue Nov 20 18:52:03 CET 2018
landry@c64.proxmox2:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 4276924416 (4078MB)
avail mem = 4138016768 (3946MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.8 @ 0xf5970 (10 entries)
bios0: vendor SeaBIOS version
"rel-1.11.0-0-g63451fca13-prebuilt.qemu-project.org" date 04/01/2014
bios0: QEMU Standard PC (Q35 + ICH9, 2009)
acpi0 at bios0: rev 0
acpi0: sleep states S3 S4 S5
acpi0: tables DSDT FACP APIC HPET MCFG
acpi0: wakeup devices
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Common KVM processor, 2933.90 MHz, 0f-06-01
cpu0:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,CX16,x2APIC,HV,NXE,LONG,LAHF,MELTDOWN
cpu0: 64KB 64b/line 2-way I-cache, 64KB 64b/line 2-way D-cache, 512KB 64b/line
16-way L2 cache
cpu0: ITLB 255 4KB entries direct-mapped, 255 4MB entries direct-mapped
cpu0: DTLB 255 4KB entries direct-mapped, 255 4MB entries direct-mapped
cpu0: smt 0, core 0, package 0
mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges
cpu0: apic clock running at 999MHz
cpu1 at mainbus0: apid 1 (application processor)
cpu1: Common KVM processor, 2933.54 MHz, 0f-06-01
cpu1:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,CX16,x2APIC,HV,NXE,LONG,LAHF,MELTDOWN
cpu1: 64KB 64b/line 2-way I-cache, 64KB 64b/line 2-way D-cache, 512KB 64b/line
16-way L2 cache
cpu1: ITLB 255 4KB entries direct-mapped, 255 4MB entries direct-mapped
cpu1: DTLB 255 4KB entries direct-mapped, 255 4MB entries direct-mapped
cpu1: smt 0, core 1, package 0
ioapic0 at mainbus0: apid 0 pa 0xfec00000, version 11, 24 pins
acpihpet0 at acpi0: 100000000 Hz
acpimcfg0 at acpi0
acpimcfg0: addr 0xb0000000, bus 0-255
acpiprt0 at acpi0: bus 0 (PCI0)
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
no _STA method
acpicpu0 at acpi0: C1(@1 halt!)
acpicpu1 at acpi0: C1(@1 halt!)
"ACPI0006" at acpi0 not configured
acpipci0 at acpi0 PCI0: 0x00000000 0x00000011 0x00000001
acpicmos0 at acpi0
"PNP0A06" at acpi0 not configured
"PNP0A06" at acpi0 not configured
"QEMU0002" at acpi0 not configured
"ACPI0010" at acpi0 not configured
pvbus0 at mainbus0: KVM
pvclock0 at pvbus0
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel 82G33 Host" rev 0x00
vga1 at pci0 dev 1 function 0 "Bochs VGA" rev 0x02
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
uhci0 at pci0 dev 26 function 0 "Intel 82801I USB" rev 0x03: apic 0 int 10
uhci1 at pci0 dev 26 function 1 "Intel 82801I USB" rev 0x03: apic 0 int 10
uhci2 at pci0 dev 26 function 2 "Intel 82801I USB" rev 0x03: apic 0 int 11
ehci0 at pci0 dev 26 function 7 "Intel 82801I USB" rev 0x03: apic 0 int 11
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00
addr 1
azalia0 at pci0 dev 27 function 0 "Intel 82801I HD Audio" rev 0x03: msi
azalia0: no HD-Audio codecs
ppb0 at pci0 dev 28 function 0 vendor "Intel", unknown product 0x3420 rev 0x02:
msi
pci1 at ppb0 bus 1
ppb1 at pci0 dev 28 function 1 vendor "Intel", unknown product 0x3420 rev 0x02:
msi
pci2 at ppb1 bus 2
ppb2 at pci0 dev 28 function 2 vendor "Intel", unknown product 0x3420 rev 0x02:
msi
pci3 at ppb2 bus 3
ppb3 at pci0 dev 28 function 3 vendor "Intel", unknown product 0x3420 rev 0x02:
msi
pci4 at ppb3 bus 4
uhci3 at pci0 dev 29 function 0 "Intel 82801I USB" rev 0x03: apic 0 int 10
uhci4 at pci0 dev 29 function 1 "Intel 82801I USB" rev 0x03: apic 0 int 10
uhci5 at pci0 dev 29 function 2 "Intel 82801I USB" rev 0x03: apic 0 int 11
ehci1 at pci0 dev 29 function 7 "Intel 82801I USB" rev 0x03: apic 0 int 11
usb1 at ehci1: USB revision 2.0
uhub1 at usb1 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00
addr 1
ppb4 at pci0 dev 30 function 0 "Intel 82801BA Hub-to-PCI" rev 0x92
pci5 at ppb4 bus 5
ppb5 at pci5 dev 1 function 0 "Red Hat Qemu PCI-PCI" rev 0x00
pci6 at ppb5 bus 6
virtio0 at pci6 dev 3 function 0 "Qumranet Virtio Memory" rev 0x00
viomb0 at virtio0
virtio0: apic 0 int 10
virtio1 at pci6 dev 10 function 0 "Qumranet Virtio Storage" rev 0x00
vioblk0 at virtio1
scsibus1 at vioblk0: 2 targets
sd0 at scsibus1 targ 0 lun 0: <VirtIO, Block Device, > SCSI3 0/direct fixed
sd0: 40960MB, 512 bytes/sector, 83886080 sectors
virtio1: msix shared
virtio2 at pci6 dev 18 function 0 "Qumranet Virtio Network" rev 0x00
vio0 at virtio2: address a2:6e:16:9f:42:71
virtio2: msix shared
ppb6 at pci5 dev 2 function 0 "Red Hat Qemu PCI-PCI" rev 0x00
pci7 at ppb6 bus 7
ppb7 at pci5 dev 3 function 0 "Red Hat Qemu PCI-PCI" rev 0x00
pci8 at ppb7 bus 8
ppb8 at pci5 dev 4 function 0 "Red Hat Qemu PCI-PCI" rev 0x00
pci9 at ppb8 bus 9
pcib0 at pci0 dev 31 function 0 "Intel 82801IB LPC" rev 0x02
ahci0 at pci0 dev 31 function 2 "Intel 82801I AHCI" rev 0x02: msi, AHCI 1.0
scsibus2 at ahci0: 32 targets
ichiic0 at pci0 dev 31 function 3 "Intel 82801I SMBus" rev 0x02: apic 0 int 10
iic0 at ichiic0
usb2 at uhci0: USB revision 1.0
uhub2 at usb2 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
usb3 at uhci1: USB revision 1.0
uhub3 at usb3 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
usb4 at uhci2: USB revision 1.0
uhub4 at usb4 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
usb5 at uhci3: USB revision 1.0
uhub5 at usb5 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
usb6 at uhci4: USB revision 1.0
uhub6 at usb6 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
usb7 at uhci5: USB revision 1.0
uhub7 at usb7 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
isa0 at pcib0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
com0: console
pckbc0 at isa0 port 0x60/5 irq 1 irq 12
pckbd0 at pckbc0 (kbd slot)
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pms0 at pckbc0 (aux slot)
wsmouse0 at pms0 mux 0
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
uhidev0 at uhub1 port 1 configuration 1 interface 0 "QEMU QEMU USB Tablet" rev
2.00/0.00 addr 2
uhidev0: iclass 3/0
ums0 at uhidev0: 3 buttons, Z dir
wsmouse1 at ums0 mux 0
vscsi0 at root
scsibus3 at vscsi0: 256 targets
softraid0 at root
scsibus4 at softraid0: 256 targets
root on sd0a (b2ee85fd752ebd49.a) swap on sd0b dump on sd0b
