Time jumping on both 4.x and 5.x ...

Sat Nov 29 12:21:37 PST 2003

> In most (all?) cases, the offset appears to be ~+/-695 secs ...

I can also report ~695 second time diffs.

The machine runs ntpd.

syslog:
Sep 28 11:05:26 /kernel: microuptime ) went backwards  10360654
535206 -> 10359959 143722) ->Diff: -695
Oct 17 17:33:29 /kernel: microuptime ) went backwards  12025537
375872 -> 12024841 976402) ->Diff: -696
Oct 19 21:49:00 /kernel: microuptime ) went backwards  12213668
882643 -> 12212973 489255) ->Diff: -695
Nov  2 03:17:11 /kernel: microuptime ) went backwards  13360159
345495 -> 13359463 951497) ->Diff: -696
Nov  6 00:47:11 /kernel: microuptime ) went backwards  13696759
218141 -> 13696063 823799) ->Diff: -696
Nov  8 08:39:00 /kernel: microuptime ) went backwards  13897869
155436 -> 13897173 758138) ->Diff: -696
Nov 28 04:09:01 /kernel: microuptime ) went backwards  15609669
581130 -> 15608974 186453) ->Diff: -695
Nov 29 11:20:08 /kernel: microuptime ) went backwards  15721936
948706 -> 15721241 548127) ->Diff: -695

sysctl:
kern.timecounter.method: 0
kern.timecounter.hardware: i8254

kernel config:
ipfw2, dummynet, divert, vlan, bpf, HZ=1000

dmesg:
Copyright (c) 1992-2003 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights reserved.
FreeBSD 4.8-RELEASE #0: Tue Apr 22 13:02:11 CEST 2003
Timecounter "i8254"  frequency 1193182 Hz
CPU: AMD Athlon(TM) XP 2000+ (1662.38-MHz 686-class CPU)
  Origin = "AuthenticAMD"  Id = 0x662  Stepping = 2

Features=0x383fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,
MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE>
  AMD Features=0xc0400000<AMIE,DSP,3DNow!>
real memory  = 503234560 (491440K bytes)
avail memory = 485478400 (474100K bytes)
Preloaded elf kernel "kernel" at 0xc03ea000.
Pentium Pro MTRR support enabled
md0: Malloc disk
Using $PIR table, 10 entries at 0xc00f20b0
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Host to PCI bridge> on motherboard
pci0: <PCI bus> on pcib0
pci0: <unknown card> (vendor=0x10de, dev=0x01ac) at 0.1
pci0: <unknown card> (vendor=0x10de, dev=0x01ad) at 0.2
pci0: <unknown card> (vendor=0x10de, dev=0x01aa) at 0.3
isab0: <PCI to ISA bridge (vendor=10de device=01b2)> at device 1.0 on
pci0
isa0: <ISA bus> on isab0
pci0: <unknown card> (vendor=0x10de, dev=0x01b4) at 1.1 irq 5
ohci0: <OHCI (generic) USB controller> mem 0xe7000000-0xe7000fff irq 10
at device 2.0 on pci0
usb0: OHCI version 1.0
usb0: SMM does not respond, resetting
usb0: <OHCI (generic) USB controller> on ohci0
usb0: USB revision 1.0
uhub0: (0x10de) OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 3 ports with 3 removable, self powered
ohci1: <OHCI (generic) USB controller> mem 0xe6800000-0xe6800fff irq 10
at device 3.0 on pci0
usb1: OHCI version 1.0
usb1: <OHCI (generic) USB controller> on ohci1
usb1: USB revision 1.0
uhub1: (0x10de) OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 3 ports with 3 removable, self powered
pci0: <unknown card> (vendor=0x10de, dev=0x01c3) at 4.0 irq 10
pci0: <unknown card> (vendor=0x10de, dev=0x01b0) at 5.0 irq 5
pci0: <unknown card> (vendor=0x10de, dev=0x01b1) at 6.0 irq 11
pcib1: <PCI to PCI bridge (vendor=10de device=01b8)> at device 8.0 on
pci0
pci1: <PCI bus> on pcib1
pcib2: <DEC 21150 PCI-PCI bridge> at device 6.0 on pci1
pci2: <PCI bus> on pcib2
fxp0: <Intel Pro 10/100B/100+ Ethernet> port 0xb800-0xb83f mem
0xe4000000-0xe40fffff,0xe4800000-0xe4800fff irq 5 at device 4.0 on pci2
fxp0: Ethernet address 00:08:9b:14:72:61
inphy0: <i82555 10/100 media interface> on miibus0
inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
fxp1: <Intel Pro 10/100B/100+ Ethernet> port 0xb400-0xb43f mem
0xe3000000-0xe30fffff,0xe3800000-0xe3800fff irq 5 at device 5.0 on pci2
fxp1: Ethernet address 00:08:9b:14:72:62
inphy1: <i82555 10/100 media interface> on miibus1
inphy1:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
fxp2: <Intel Pro 10/100B/100+ Ethernet> port 0xb000-0xb03f mem
0xe2000000-0xe20fffff,0xe2800000-0xe2800fff irq 5 at device 6.0 on pci2
fxp2: Ethernet address 00:08:9b:14:71:a9
inphy2: <i82555 10/100 media interface> on miibus2
inphy2:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
fxp3: <Intel Pro 10/100B/100+ Ethernet> port 0xa800-0xa83f mem
0xe1000000-0xe10fffff,0xe1800000-0xe1800fff irq 5 at device 7.0 on pci2
fxp3: Ethernet address 00:08:9b:14:71:aa
inphy3: <i82555 10/100 media interface> on miibus3
inphy3:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
atapci0: <nVIDIA nForce ATA100 controller> port 0x9800-0x980f at device
9.0 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
pcib3: <PCI to PCI bridge (vendor=10de device=01b7)> at device 30.0 on
pci0
pci3: <PCI bus> on pcib3
pci3: <NVidia model 01a0 graphics accelerator> at 0.0 irq 11
orm0: <Option ROM> at iomem 0xd0000-0xd3fff on isa0
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on
isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on
isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x100>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A, console
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
ppc0: FIFO with 16/16/9 bytes threshold
ipfw2 initialized, divert enabled, rule-based forwarding enabled,
default to deny, logging limited to 100 packets/entry by default
DUMMYNET initialized (011031)
ad0: 78533MB <IC35L080AVVA07-0> [159560/16/63] at ata0-master PIO4
Mounting root from ufs:/dev/ad0s1a

Best Regards,

Oivind H. Danielsen