OpenBSD 2.8 Box Losing 5-15 seconds per day

[Scott Roy Atwood <atwood_(_at_)_cs_(_dot_)_stanford_(_dot_)_edu>]

Does anyone know why the system clock on my OpenBSD 2.8-stable box is
losing large amounts of time?  Based on the sum of the times in the
xntpd "time reset (step)" messages in /var/log/messages, I appear to be 
losing around 5 to 15 seconds per day.

I seem to remember there being a problem related to WaveLAN cards, but
I couldn't find anything in the mailing list archives.  There does seem
to be a correlation between traffic on wi0 and the amount of time that
is lost on any particular day.

Here is my dmesg:

OpenBSD 2.8-stable (GENERIC) #0: Thu Jan  4 19:27:28 PST 2001
    atwood_(_at_)_orion_(_dot_)_scot_(_dot_)_to:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: F00F bug workaround installed
cpu0: Intel Pentium (P54C) ("GenuineIntel" 586-class) 133 MHz
cpu0: FPU,V86,DE,PSE,TSC,MSR,MCE,CX8
real mem  = 49917952 (48748K)
avail mem = 41230336 (40264K)
using 634 buffers containing 2596864 bytes (2536K) of memory
mainbus0 (root)
bios0 at mainbus0: AT/286+(a8) BIOS, date 07/01/98, BIOS32 rev. 0 @
0xfb300
apm0 at bios0: Power Management spec V1.2
apm0: AC on, battery charge unknown
pcibios0 at bios0: rev. 2.1 found at 0xf0000[0xb778]
pcibios0: PCI IRQ Routing Table rev. 1.0 found at 0xfdcf0, size 112
bytes (5 entries)
pcibios0: PCI Interrupt Router at 000:07:0 ("VIA VT82C586 (Apollo VP)
PCI-ISA" rev 0x00)
pcibios0: PCI Exclusive IRQs: 5 7 10 11
pcibios0: PCI bus #0 is the last bus
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0 "VIA VT82C585 (Apollo) PCI-ISA" rev 0x23
pcib0 at pci0 dev 7 function 0 "VIA VT82C586 (Apollo VP) PCI-ISA" rev
0x41
pciide0 at pci0 dev 7 function 1 "VIA VT82C586A IDE" rev 0x06: DMA,
channel 0 configured to compatibility, channel 1 configured to
compatibility
wd0 at pciide0 channel 0 drive 0: <QUANTUM FIREBALLlct10 05>
wd0: can use 32-bit, PIO mode 4, DMA mode 2, Ultra-DMA mode 2
wd0: 16-sector PIO, LBA, 4884MB, 10585 cyl, 15 head, 63 sec, 10002825
sectors
pciide0: channel 0 interrupting at irq 14
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2 (using DMA data
transfers)
atapiscsi0 at pciide0 channel 1
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <MITSUMI, CD-ROM FX400E !B, K04> SCSI0
5/cdrom removable
cd0: can use 32-bit, PIO mode 3
pciide0: channel 1 interrupting at irq 15
cd0(pciide0:1:0): using PIO mode 3
pchb1 at pci0 dev 7 function 3 "VIA VT82C586 (Apollo VP) Power
Management" rev 0x10
ahc1 at pci0 dev 8 function 0 "Adaptec AHA-2930CU" rev 0x03: irq 10
ahc1: Single Channel A, SCSI Id=7, 3/255 SCBs
scsibus1 at ahc1: 8 targets
"NVidia/SGS-Thomson Velocity128" rev 0x22 at pci0 dev 9 function 0 not
configured
sis0 at pci0 dev 10 function 0 "National Semiconductor DP83815 10/100"
rev 0x00: irq 7 address 00:a0:cc:7b:88:9e
ukphy0 at sis0 phy 0: Generic IEEE 802.3u media interface
ukphy0: OUI 0x080017, model 0x0002, rev. 1
isa0 at pcib0
isadma0 at isa0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
sysbeep0 at pcppi0
npx0 at isa0 port 0xf0/16: using exception 16
pccom0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
pccom1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
vt0 at isa0 port 0x60/16 irq 1: vga 80 col, color, 8 scr, mf2-kbd
pms0 at vt0 irq 12
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
pcic1 at isa0 port 0x3e2/2 iomem 0xe0000/16384
pcic1 controller 0: <Vadem VG469> has sockets A and B
pcmcia0 at pcic1 controller 0 socket 0
wi0 at pcmcia0 function 0 "Lucent Technologies, WaveLAN/IEEE, Version
01.01": address 00:02:2d:00:2f:5b irq 9
pcmcia1 at pcic1 controller 0 socket 1
pcic1: irq 11, polling enabled
biomask c440 netmask c6c0 ttymask dec2
pctr: 586-class performance counters and user-level cycle counter
enabled
dkcsum: wd0 matched BIOS disk 80
root on wd0a
rootdev=0x0 rrootdev=0x300 rawdev=0x302
WARNING: / was not properly unmounted

-- 
Scott Atwood
atwood_(_at_)_cs_(_dot_)_stanford_(_dot_)_edu