xl0 wierdness

["James Phillips [dengue]" <dengue_(_at_)_deadly_(_dot_)_org>]

I am using a 3com 3c905B pci ethernet adaptor, and I noticed a lot of
dropped packets last night with the errors "command never completed".

This is the relevant piece from dmesg, the entire dmesg is attached below.

Dec  9 09:31:52 eris /bsd: xl0 at pci0 dev 9 function 0 vendor 0x10b7
product 0x9055 rev 0x30: irq 10xl0: command never completed!
Dec  9 09:31:52 eris /bsd: exphy0 at xl0 phy 24: 3Com internal media
interface


This is from my /var/log/messages last night while the problem was
occuring.

Dec  8 13:05:00 eris /bsd: xl0: command never completed!
Dec  8 13:21:45 eris /bsd: xl0: command never completed!
Dec  8 13:58:45 eris /bsd: xl0: command never completed!
Dec  8 21:33:09 eris /bsd: xl0: bad receive status -- packet droppedxl0:
bad receive status -- packet droppedxl0: bad receive status -- packet
droppedxl0: bad receive status -- packet dropped


After searching both the
tech@ and misc@ archives I found 4 references to this problem:

from misc@
199910/msg00254:Re: *Now* is the time to test snapshots.
199910/msg00843:BPF causes panic under high load

from tech@
199903/msg00009:if_xl
199911/msg00253:IPsec strangeness

However, I didn't see any thing further such as a fix. Here are the
relevant statistics for yesterday from my daily output:

xl0  1500  <Link>      00:10:5a:15:24:9e    85924   610    78598     0 15
xl0  1500  h216-170-01 eris                 85924   610    78598     0 15

Throughout the evening I noticed a real problem with steadily decreasing
throughput, which appears to be fixed by a reboot. Is this a known problem
with the 3com 3c905?

Any enlightenment is appreciated, particularly vis-a-vis this problem.

dmesg follows:

OpenBSD 2.6 (ERIS) #0: Tue Dec  7 12:00:35 CST 1999
    dengue_(_at_)_eris_(_dot_)_deadly_(_dot_)_org:/usr/src/sys/arch/i386/compile/ERIS
cpu0: AMD K6-2 ("AuthenticAMD" 586-class) 451 MHz
cpu0: FPU,V86,DE,PSE,TSC,MSR,MCE,CX8,PGE,MMX
BIOS mem  = 654336 conventional, 133169152 extended
real mem  = 133824512
avail mem = 121196544
using 1659 buffers containing 6795264 bytes of memory
mainbus0 (root)
bios0 at mainbus0: AT/286+(aa) BIOS, date 07/20/98
bios0: diskinfo 0xe04cc00c cksumlen 33 memmap 0xe04cc088 apminfo 0xe04cc10c
apm0 at bios0: Power Management spec V1.1
apm0: AC on, no battery
pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
pchb0 at pci0 dev 0 function 0 vendor 0x1106 product 0x0597 rev 0x04
ppb0 at pci0 dev 1 function 0 vendor 0x1106 product 0x8598 rev 0x00
pci1 at ppb0 bus 1
vendor 0x121a product 0x0003 (class display, subclass VGA, rev 0x03) at pci1 dev 0 function 0 not configured
pcib0 at pci0 dev 7 function 0 vendor 0x1106 product 0x0586 rev 0x41
pciide0 at pci0 dev 7 function 1 vendor 0x1106 product 0x0571 rev 0x06: DMA, channel 0 configured to compatibility, channel 1 configured to compatibility
atapiscsi0 at pciide0 channel 1
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <ATAPI, 40X CDROM, 3.80> SCSI0 5/cdrom removable
cd0: can use 32-bit, PIO mode 4, DMA mode 2, Ultra-DMA mode 2
pciide0: channel 1 interrupting at irq 15
cd0(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 2 (using DMA data transfers)
vendor 0x1106 product 0x3040 (class bridge, subclass miscellaneous, rev 0x10) at pci0 dev 7 function 3 not configured
ahc1 at pci0 dev 8 function 0 vendor 0x9004 product 0x8178 rev 0x01: irq 11
ahc1: aic7880 Wide Channel, SCSI Id=7, 16 SCBs
scsibus1 at ahc1: 16 targets
ahc1: target 0 using 16Bit transfers
ahc1: target 0 synchronous at 20.0MHz, offset = 0x8
sd0 at scsibus1 targ 0 lun 0: <SEAGATE, ST31055W, 0596> SCSI2 0/direct fixed
sd0: 1010MB, 4177 cyl, 4 head, 123 sec, 512 bytes/sec, 2069860 sec total
ahc1: target 1 using 16Bit transfers
ahc1: target 1 synchronous at 20.0MHz, offset = 0x8
sd1 at scsibus1 targ 1 lun 0: <SEAGATE, ST31055W, 0596> SCSI2 0/direct fixed
sd1: 1010MB, 4177 cyl, 4 head, 123 sec, 512 bytes/sec, 2069860 sec total
ahc1: target 3 synchronous at 10.0MHz, offset = 0xf
sd2 at scsibus1 targ 3 lun 0: <iomega, jaz 2GB, E.16> SCSI2 0/direct removable
sd2: drive offline
ahc1: target 4 synchronous at 10.0MHz, offset = 0xf
cd1 at scsibus1 targ 4 lun 0: <SAF, CD-R4012, 6.0J> SCSI2 5/cdrom removable
ahc1: target 6 synchronous at 5.0MHz, offset = 0x8
st0 at scsibus1 targ 6 lun 0: <HP, HP35470A, T503> SCSI2 1/sequential removable
st0: drive empty
xl0 at pci0 dev 9 function 0 vendor 0x10b7 product 0x9055 rev 0x30: irq 10xl0: command never completed!
 address 00:10:5a:15:24:9e
exphy0 at xl0 phy 24: 3Com internal media interface
eap0 at pci0 dev 10 function 0 vendor 0x1274 product 0x1371 rev 0x06: irq 9
ac97: codec id 0x54524123
ac97: codec features No 3D Stereo
audio0 at eap0
isa0 at pcib0
isadma0 at isa0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
sysbeep0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
npx0 at isa0 port 0xf0/16: using exception 16
pccom0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
vt0 at isa0 port 0x60/16 irq 1: generic VGA, 80 col, color, 8 scr, mf2-kbd
pms0 at vt0 irq 12
biomask 8800 netmask 8c00 ttymask 9c82
pctr: user-level cycle counter enabled
dkcsum: sd0 matched BIOS disk 80
dkcsum: sd1 matched BIOS disk 81
root on sd0a
rootdev=0x400 rrootdev=0xd00 rawdev=0xd02
IP Filter: initialized.  Default = pass all, Logging = enabled

Sorry for the length of this mail, I have been conditioned to provide as
much information as possible before asking for help.

thank you 

james phillips