cvs commit: src/sys/dev/em if_em.c

Ollivier Robert roberto at
Tue Sep 12 07:27:43 PDT 2006

[old thread but I'm trying to reduce my backlog]

According to Stefan Bethke:
> I have no idea whether the effect I'm seeing is related at all, but  
> the description fits.  If I load the CPU (make world -j4 or gzip -9 </ 
> dev/random >/dev/null), traffic over re0 stops and I get

On my old 2x PIII/800 machine, I get watchdog timeouts on an 3C905C card
(xl0) and a similar card generates the same problem here when the traffic
is high but I never get it on em0 even though xl0 is only the connection to
the DSL modem:

FreeBSD 6.1-STABLE #0: Tue Jun 27 19:43:32 CEST 2006
    root at
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Pentium(R) D CPU 2.80GHz (2793.09-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf47  Stepping = 7
  AMD Features=0x20100000<NX,LM>
  AMD Features2=0x1<LAHF>
  Cores per package: 2
real memory  = 535347200 (510 MB)
avail memory = 518574080 (494 MB)
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
em0: <Intel(R) PRO/1000 Network Connection Version - 3.2.18> port 0xcce0-0xccff mem 0xfe3e0000-0xfe3fffff,0xfe400000-0xfe7fffff irq 17 at device 0.0 on pci4
em0: Ethernet address: 00:13:72:15:0f:44

xl0: <3Com 3c905-TX Fast Etherlink XL> port 0xbcc0-0xbcff irq 18 at device 2.0 on pci5
miibus0: <MII bus> on xl0
nsphy0: <DP83840 10/100 media interface> on miibus0
nsphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
xl0: Ethernet address: 00:60:97:11:e8:f8

em0 at pci4:0:0:	class=0x020000 card=0x01d11028 chip=0x109a8086 rev=0x01 hdr=0x00
    vendor   = 'Intel Corporation'
    class    = network
    subclass = ethernet
xl0 at pci5:2:0:	class=0x020000 card=0x00000000 chip=0x905010b7 rev=0x00 hdr=0x00
    vendor   = '3COM Corp, Networking Division'
    device   = '3C905-TX Fast Etherlink XL PCI 10/100'
    class    = network
    subclass = ethernet

Ollivier ROBERT -=- FreeBSD: The Power to Serve! -=- roberto at
Darwin Kernel Version 7.9.0: Wed Mar 30 20:11:17 PST 2005

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