After looking through the mailing list archives, I'm seeking advice on
running an OpenBSD i386 guest successfully without losing too much
time. My host is an 8th-gen Intel NUC (dmesg *2 follows), and both the
host and any OpenBSD amd64 guest keep time beautifully using the tsc
time source. I've needed to make no changes to sysctl or HZ as
compiled in the kernel.
When firing up an i386 guest to do some release(8) builds, I have no
issues with running those tasks, but the system loses time on the
order of 4-5 for every 20, even when sitting idle. It appears that
there is no tsc source found on i386, and taking a peak at
src/sys/arch/i386/i386 indicates that perhaps this isn't available?
What's the preferred method to get such a guest in line? I've included
various sysctl, ntpd, and dmesg output below. All systems are running
6.4-stable. Thanks!
Brian Conway
amd64 host kern.timecounter (amd64 guest is similar):
# sysctl kern.timecounter
kern.timecounter.tick=1
kern.timecounter.timestepwarnings=0
kern.timecounter.hardware=tsc
kern.timecounter.choice=i8254(0) acpihpet0(1000) tsc(2000)
acpitimer0(1000) dummy(-1000000)
i386 guest:
kern.timecounter.tick=1
kern.timecounter.timestepwarnings=0
kern.timecounter.hardware=i8254
kern.timecounter.choice=i8254(0) dummy(-1000000)
i386 guest after 20 minutes of uptime (jitter and delay reflect
redirection to a local ntp server):
-----
$ ntpctl -s all
4/4 peers valid, 1/1 sensors valid, constraint offset 3s (4 errors),
clock unsynced, clock offset is 26743.868ms
peer
wt tl st next poll offset delay jitter
107.181.191.189 from pool us.pool.ntp.org
1 10 3 1945s 3135s 6537.870ms 1.062ms 0.316ms
142.147.92.5 from pool us.pool.ntp.org
1 10 3 1898s 3086s 5915.575ms 0.854ms 0.082ms
216.229.4.69 from pool us.pool.ntp.org
1 10 3 1928s 3115s 5919.290ms 0.887ms 0.110ms
216.6.2.70 from pool us.pool.ntp.org
1 10 3 1825s 3017s 3889.790ms 0.852ms 0.115ms
sensor
wt gd st next poll offset correction
vmmci0
1 1 0 10s 15s 1277789.475ms 0.000ms
-----
i386 guest ntpd logs:
-----
Jan 10 01:41:46 b64-i386 ntpd[5306]: ntp engine ready
Jan 10 01:41:47 b64-i386 ntpd[98096]: set local clock to Thu Jan 10
01:41:47 UTC 2019 (offset 0.647554s)
Jan 10 01:41:47 b64-i386 savecore: no core dump
Jan 10 01:41:49 b64-i386 ntpd[5306]: constraint reply from
172.217.2.228: offset 2.592767
Jan 10 01:42:09 b64-i386 ntpd[5306]: peer 216.229.4.69 now valid
Jan 10 01:42:11 b64-i386 ntpd[5306]: peer 216.6.2.70 now valid
Jan 10 01:42:12 b64-i386 ntpd[5306]: peer 142.147.92.5 now valid
Jan 10 01:42:14 b64-i386 ntpd[5306]: peer 107.181.191.189 now valid
Jan 10 01:43:05 b64-i386 ntpd[81307]: adjusting local clock by 33.008869s
Jan 10 01:44:06 b64-i386 ntpd[5306]: reply from 216.6.2.70: constraint
check failed
Jan 10 01:44:08 b64-i386 ntpd[5306]: reply from 107.181.191.189:
constraint check failed
Jan 10 01:44:10 b64-i386 ntpd[5306]: reply from 142.147.92.5:
constraint check failed
Jan 10 01:44:11 b64-i386 ntpd[5306]: reply from 216.229.4.69:
constraint check failed
...
-----
amd64 host dmesg:
-----
OpenBSD 6.4-stable (GENERIC.MP) #3: Mon Jan 7 01:46:29 UTC 2019
bcon...@nc.int.rcesoftware.com:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 8452431872 (8060MB)
avail mem = 8187002880 (7807MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.8 @ 0x7a9a4000 (76 entries)
bios0: vendor Intel Corp. version "BECFL357.86A.0056.2018.1128.1717"
date 11/28/2018
bios0: Intel(R) Client Systems NUC8i5BEH
acpi0 at bios0: rev 2
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP APIC FPDT FIDT MCFG SSDT SSDT SSDT HPET SSDT
SSDT UEFI LPIT SSDT SSDT DBGP DBG2 SSDT DMAR BGRT WSMT
acpi0: wakeup devices SIO1(S3) PXSX(S4) RP01(S4) PXSX(S4) RP02(S4)
PXSX(S4) RP03(S4) PXSX(S4) RP04(S4) PXSX(S4) RP05(S4) PXSX(S4)
RP06(S4) PXSX(S4) RP07(S4) PXSX(S4) [...]
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Core(TM) i5-8259U CPU @ 2.30GHz, 2195.91 MHz, 06-8e-0a
cpu0:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,XSAVEC,XGETBV1,XSAVES,MELTDOWN
cpu0: 256KB 64b/line 8-way L2 cache
cpu0: smt 0, core 0, package 0
mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges
cpu0: apic clock running at 24MHz
cpu0: mwait min=64, max=64, C-substates=0.2.1.2.4.1.1.1, IBE
cpu1 at mainbus0: apid 2 (application processor)
cpu1: Intel(R) Core(TM) i5-8259U CPU @ 2.30GHz, 2194.93 MHz, 06-8e-0a
cpu1:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,XSAVEC,XGETBV1,XSAVES,MELTDOWN
cpu1: 256KB 64b/line 8-way L2 cache
cpu1: smt 0, core 1, package 0
cpu2 at mainbus0: apid 4 (application processor)
cpu2: Intel(R) Core(TM) i5-8259U CPU @ 2.30GHz, 2194.93 MHz, 06-8e-0a
cpu2:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,XSAVEC,XGETBV1,XSAVES,MELTDOWN
cpu2: 256KB 64b/line 8-way L2 cache
cpu2: smt 0, core 2, package 0
cpu3 at mainbus0: apid 6 (application processor)
cpu3: Intel(R) Core(TM) i5-8259U CPU @ 2.30GHz, 2194.93 MHz, 06-8e-0a
cpu3:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,XSAVEC,XGETBV1,XSAVES,MELTDOWN
cpu3: 256KB 64b/line 8-way L2 cache
cpu3: smt 0, core 3, package 0
ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 120 pins
acpimcfg0 at acpi0
acpimcfg0: addr 0xe0000000, bus 0-255
acpihpet0 at acpi0: 23999999 Hz
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus -1 (PEG0)
acpiprt2 at acpi0: bus -1 (PEG1)
acpiprt3 at acpi0: bus -1 (PEG2)
acpiprt4 at acpi0: bus -1 (RP01)
acpiprt5 at acpi0: bus -1 (RP02)
acpiprt6 at acpi0: bus -1 (RP03)
acpiprt7 at acpi0: bus -1 (RP04)
acpiprt8 at acpi0: bus -1 (RP05)
acpiprt9 at acpi0: bus -1 (RP06)
acpiprt10 at acpi0: bus -1 (RP07)
acpiprt11 at acpi0: bus -1 (RP08)
acpiprt12 at acpi0: bus -1 (RP09)
acpiprt13 at acpi0: bus -1 (RP10)
acpiprt14 at acpi0: bus -1 (RP11)
acpiprt15 at acpi0: bus -1 (RP12)
acpiprt16 at acpi0: bus -1 (RP13)
acpiprt17 at acpi0: bus -1 (RP14)
acpiprt18 at acpi0: bus -1 (RP15)
acpiprt19 at acpi0: bus -1 (RP16)
acpiprt20 at acpi0: bus -1 (RP17)
acpiprt21 at acpi0: bus -1 (RP18)
acpiprt22 at acpi0: bus -1 (RP19)
acpiprt23 at acpi0: bus -1 (RP20)
acpiprt24 at acpi0: bus -1 (RP21)
acpiprt25 at acpi0: bus -1 (RP22)
acpiprt26 at acpi0: bus -1 (RP23)
acpiprt27 at acpi0: bus -1 (RP24)
acpiec0 at acpi0
acpitz0 at acpi0acpitz0: TZ0_: failed to read _HOT
acpitz0: TZ0_: failed to read _TMP
acpitz0: TZ0_: failed to read _TMP
acpipwrres0 at acpi0: USBC, resource for XDCI
acpipwrres1 at acpi0: V0PR
acpipwrres2 at acpi0: V1PR
acpipwrres3 at acpi0: V2PR
acpipwrres4 at acpi0: WRST
acpicpu0 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151
mwait.1@0x33), C1(1000@1 mwait.1), PSS
acpicpu1 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151
mwait.1@0x33), C1(1000@1 mwait.1), PSS
acpicpu2 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151
mwait.1@0x33), C1(1000@1 mwait.1), PSS
acpicpu3 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151
mwait.1@0x33), C1(1000@1 mwait.1), PSS
acpipwrres5 at acpi0: FN00, resource for FAN0
acpipwrres6 at acpi0: FN01, resource for FAN1
acpipwrres7 at acpi0: FN02, resource for FAN2
acpipwrres8 at acpi0: FN03, resource for FAN3
acpipwrres9 at acpi0: FN04, resource for FAN4
acpitz1 at acpi0: critical temperature is 119 degC
acpipwrres10 at acpi0: PIN_
acpicmos0 at acpi0
"INT34BB" at acpi0 not configured
"PNP0C14" at acpi0 not configured
acpibtn0 at acpi0: SLPB
"PNP0C14" at acpi0 not configured
"PNP0C14" at acpi0 not configured
"INT33A1" at acpi0 not configured
acpibtn1 at acpi0: PWRB
"PNP0C0B" at acpi0 not configured
"PNP0C0B" at acpi0 not configured
"PNP0C0B" at acpi0 not configured
"PNP0C0B" at acpi0 not configured
"PNP0C0B" at acpi0 not configured
"PNP0C14" at acpi0 not configured
acpivideo0 at acpi0: GFX0
acpivout0 at acpivideo0: DD1F
cpu0: Enhanced SpeedStep 2195 MHz: speeds: 2301, 2300, 2200, 2000,
1900, 1800, 1600, 1500, 1300, 1100, 1000, 900, 800, 700, 500, 400 MHz
pci0 at mainbus0 bus 0
0:31:5: mem address conflict 0xfe010000/0x1000
pchb0 at pci0 dev 0 function 0 vendor "Intel", unknown product 0x3ed0 rev 0x08
vendor "Intel", unknown product 0x3ea5 (class display subclass VGA,
rev 0x01) at pci0 dev 2 function 0 not configured
"Intel Core GMM" rev 0x00 at pci0 dev 8 function 0 not configured
vendor "Intel", unknown product 0x9df9 (class DASP subclass
miscellaneous, rev 0x30) at pci0 dev 18 function 0 not configured
xhci0 at pci0 dev 20 function 0 vendor "Intel", unknown product 0x9ded
rev 0x30: msi, xHCI 1.16
usb0 at xhci0: USB revision 3.0
uhub0 at usb0 configuration 1 interface 0 "Intel xHCI root hub" rev
3.00/1.00 addr 1
vendor "Intel", unknown product 0x9def (class memory subclass RAM, rev
0x30) at pci0 dev 20 function 2 not configured
vendor "Intel", unknown product 0x9df0 (class network subclass
miscellaneous, rev 0x30) at pci0 dev 20 function 3 not configured
vendor "Intel", unknown product 0x9de0 (class communications subclass
miscellaneous, rev 0x30) at pci0 dev 22 function 0 not configured
ahci0 at pci0 dev 23 function 0 vendor "Intel", unknown product 0x9dd3
rev 0x30: msi, AHCI 1.3.1
ahci0: port 2: 6.0Gb/s
scsibus1 at ahci0: 32 targets
sd0 at scsibus1 targ 2 lun 0: <ATA, Crucial_CT240M50, MU05> SCSI3
0/direct fixed naa.500a07510c06ed9d
sd0: 228936MB, 512 bytes/sector, 468862128 sectors, thin
pcib0 at pci0 dev 31 function 0 vendor "Intel", unknown product 0x9d84 rev 0x30
vendor "Intel", unknown product 0x9da3 (class serial bus subclass
SMBus, rev 0x30) at pci0 dev 31 function 4 not configured
vendor "Intel", unknown product 0x9da4 (class serial bus unknown
subclass 0x80, rev 0x30) at pci0 dev 31 function 5 not configured
em0 at pci0 dev 31 function 6 "Intel I219-V" rev 0x30: msi, address
94:c6:91:a8:54:23
isa0 at pcib0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
com0: probed fifo depth: 0 bytes
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
vmm0 at mainbus0: VMX/EPT
efifb0 at mainbus0: 1680x1050, 32bpp
wsdisplay0 at efifb0 mux 1: console (std, vt100 emulation)
wsdisplay0: screen 1-5 added (std, vt100 emulation)
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
root on sd0a (207110c0facab1e3.a) swap on sd0b dump on sd0b
-----
i386 guest dmesg:
-----
OpenBSD 6.4-stable (GENERIC) #1: Tue Jan 8 07:37:53 UTC 2019
bcon...@b64-i386.int.rcesoftware.com:/usr/src/sys/arch/i386/compile/GENERIC
real mem = 1073225728 (1023MB)
avail mem = 1038622720 (990MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: date 06/23/99, BIOS32 rev. 0 @ 0xfdc65, SMBIOS rev.
2.4 @ 0xf1950 (10 entries)
bios0: vendor SeaBIOS version "1.11.0p0-OpenBSD-vmm" date 01/01/2011
bios0: OpenBSD VMM
acpi at bios0 function 0x0 not configured
pcibios at bios0 function 0x1a not configured
bios0: ROM list: 0xef000/0x1000!
cpu0 at mainbus0: (uniprocessor)
cpu0: Intel(R) Core(TM) i5-8259U CPU @ 2.30GHz ("GenuineIntel"
686-class) 2.31 GHz, 06-8e-0a
cpu0:
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,SSE3,PCLMUL,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,RDRAND,HV,NXE,PAGE1GB,LONG,LAHF,ABM,3DNOWP,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,ERMS,RDSEED,ADX,SMAP,CLFLUSHOPT,MELTDOWN
pvbus0 at mainbus0: OpenBSD
pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
pchb0 at pci0 dev 0 function 0 "OpenBSD VMM Host" rev 0x00
virtio0 at pci0 dev 1 function 0 "Qumranet Virtio RNG" rev 0x00
viornd0 at virtio0
virtio0: irq 3
virtio1 at pci0 dev 2 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: 15360MB, 512 bytes/sector, 31457280 sectors
virtio1: irq 5
virtio2 at pci0 dev 3 function 0 "Qumranet Virtio Network" rev 0x00
vio0 at virtio2: address fe:e1:bb:d1:15:e5
virtio2: irq 6
virtio3 at pci0 dev 4 function 0 "OpenBSD VMM Control" rev 0x00
vmmci0 at virtio3
virtio3: irq 7
isa0 at mainbus0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns16450, no fifo
com0: console
pcdisplay0 at isa0 port 0x3d0/16 iomem 0xb8000/32768
wsdisplay0 at pcdisplay0 mux 1: console (80x25, vt100 emulation)
npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
root on sd0a (f5af63032b1e4a54.a) swap on sd0b dump on sd0b
-----
