hello, until 15 minutes ago I had a nasty ethernet behaviour on my laptop, i.e watchdog timeout forever and ever in tx (rx seems ok for what I can see) I decided to dig into the source and I've enabled a little bit of degugging messages.
mskc0 at pci1 dev 0 function 0 "Marvell Yukon 88E8036" rev 0x13 begin mskc_attach mskc_attach: allocate interrupt mskc_reset mskc_reset: sk_csr=4a mskc_reset: sk_link_ctrl=2 mskc_attach: ramsize=4096 (4k), rboff=0 , Yukon-2 FE (0x1): apic 2 int 16 (irq 7) msk0 at mskc0 port A begin msk_attach: port=0, address 00:13:a9:60:1b:eb msk_attach: rx_ramstart=0 rx_ramend=0x154 tx_ramstart=0x155 tx_ramend=0x1fe first thing I've noted is the rx and tx buffer dimension calculation rx -> 0x154 tx -> 0xa9 w/o thinking twice with a priory knowledge of ramsize i.e 4k I've modified the algorithm as follow: chunk = sc->sk_ramsize - (sc->sk_ramsize>>1); val = sc->sk_rboff / sizeof(u_int64_t); sc_if->sk_rx_ramstart = val; val += (chunk / sizeof(u_int64_t)); sc_if->sk_rx_ramend = val - 1; chunk = sc->sk_ramsize - chunk; sc_if->sk_tx_ramstart = val; val += (chunk / sizeof(u_int64_t)); sc_if->sk_tx_ramend = val - 1; compiled and restarted: mskc0 at pci1 dev 0 function 0 "Marvell Yukon 88E8036" rev 0x13 begin mskc_attach mskc_attach: allocate interrupt mskc_reset mskc_reset: sk_csr=4a mskc_reset: sk_link_ctrl=2 mskc_attach: ramsize=4096 (4k), rboff=0 , Yukon-2 FE (0x1): apic 2 int 16 (irq 7) msk0 at mskc0 port A begin msk_attach: port=0, address 00:13:a9:60:1b:eb msk_attach: rx_ramstart=0 rx_ramend=0xff tx_ramstart=0x100 tx_ramend=0x1ff now both rx and tx buffer has the same size result: msk works like a charm with no more watchdog timeouts hope in a answer, thanks, OpenBSD 4.1-current (GENERIC.MP) #5: Fri May 11 22:34:35 CEST 2007 [EMAIL PROTECTED]:/usr/src/sys/arch/i386/compile/GENERIC.MP cpu0: Intel(R) Core(TM)2 CPU T5500 @ 1.66GHz ("GenuineIntel" 686-class) 1.67 GHz cpu0: FPU,V86,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,SBF,SSE3,MWAIT,DS-CPL,EST,TM2,CX16,xTPR real mem = 1063415808 (1038492K) avail mem = 963076096 (940504K) using 4278 buffers containing 53293056 bytes (52044K) of memory mainbus0 (root) bios0 at mainbus0: AT/286+ BIOS, date 11/15/06, BIOS32 rev. 0 @ 0xfd5f0, SMBIOS rev. 2.4 @ 0xdc010 (18 entries) bios0: Sony Corporation VGN-C1S_H pcibios0 at bios0: rev 2.1 @ 0xfd5f0/0xa10 pcibios0: PCI IRQ Routing Table rev 1.0 @ 0xfdec0/288 (16 entries) pcibios0: PCI Interrupt Router at 000:31:0 ("Intel 82371FB ISA" rev 0x00) pcibios0: PCI bus #6 is the last bus bios0: ROM list: 0xc0000/0x10000! 0xdc000/0x4000! 0xe0000/0x1800! acpi0 at mainbus0: rev 0 acpi0: tables DSDT FACP APIC MCFG APIC BOOT SSDT SSDT acpitimer0 at acpi0: 3579545 Hz, 24 bits acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: apic clock running at 166 MHz cpu1 at mainbus0: apid 1 (application processor) cpu1: Intel(R) Core(TM)2 CPU T5500 @ 1.66GHz ("GenuineIntel" 686-class) 1.67 GHz cpu1: FPU,V86,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,SBF,SSE3,MWAIT,DS-CPL,EST,TM2,CX16,xTPR ioapic0 at mainbus0: apid 1 pa 0xfec00000, version 20, 24 pins ioapic0: duplicate apic id, remapped to apid 2 acpiprt0 at acpi0: bus 0 (PCI0) acpiprt1 at acpi0: bus 0 (PEGP) acpiprt2 at acpi0: bus 1 (RP01) acpiprt3 at acpi0: bus 2 (RP02) acpiprt4 at acpi0: bus 3 (RP03) acpiprt5 at acpi0: bus 4 (RP04) acpiprt6 at acpi0: bus 5 (PCIB) acpiec0 at acpi0: EC__ acpicpu0 at acpi0: CPU0: acpicpu1 at acpi0: CPU1: acpitz0 at acpi0, critical temperature: 105 degC acpitz1 at acpi0, critical temperature: 105 degC acpiac0 at acpi0: AC unit online acpibat0 at acpi0: BAT0: not present acpibtn0 at acpi0: LID0 acpibtn1 at acpi0: PWRB acpidock0 at acpi0: DOCK: not docked (0) cpu0: unknown Enhanced SpeedStep CPU, msr 0x06130a2a06000a2a cpu0: using only highest and lowest power states cpu0: Enhanced SpeedStep 1667 MHz (1372 mV): speeds: 1667, 1000 MHz pci0 at mainbus0 bus 0: configuration mode 1 (no bios) pchb0 at pci0 dev 0 function 0 "Intel 82945GM MCH" rev 0x03 vga1 at pci0 dev 2 function 0 "Intel 82945GM Video" rev 0x03: aperture at 0xd0100000, size 0x10000000 wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation) wsdisplay0: screen 1-5 added (80x25, vt100 emulation) "Intel 82945GM Video" rev 0x03 at pci0 dev 2 function 1 not configured azalia0 at pci0 dev 27 function 0 "Intel 82801GB HD Audio" rev 0x02: apic 2 int 22 (irq 4) azalia0: host: High Definition Audio rev. 1.0 azalia0: codec: 0x10ec/0x0262 (rev. 1.0), HDA version 1.0 azalia0: codec: 0x14f1/0x2c06 (rev. 0.0), HDA version 1.0 azalia0: codec[1]: No support for modem function groups azalia0: codec[1]: No audio function groups audio0 at azalia0 ppb0 at pci0 dev 28 function 0 "Intel 82801GB PCIE" rev 0x02 pci1 at ppb0 bus 1 mskc0 at pci1 dev 0 function 0 "Marvell Yukon 88E8036" rev 0x13begin mskc_attach mskc_attach: allocate interrupt mskc_reset mskc_reset: sk_csr=4a mskc_reset: sk_link_ctrl=2 mskc_attach: ramsize=4096 (4k), rboff=0 , Yukon-2 FE (0x1): apic 2 int 16 (irq 7) msk0 at mskc0 port Abegin msk_attach: port=0 , address 00:13:a9:60:1b:eb msk_attach: rx_ramstart=0 rx_ramend=0xff tx_ramstart=0x100 tx_ramend=0x1ff msk_jumbo_buf = 0xE9284000 msk_init_yukon: start: sk_csr=0xa603154a msk_init_yukon: 1 msk_init_yukon: gmac_ctrl=0x5a msk_init_yukon: 3 msk_init_yukon: 4 msk_init_yukon: 4a msk_init_yukon: YUKON_PAR=0 msk_init_yukon: YUKON_PAR=0x20 msk_init_yukon: 4b msk_init_yukon: 5 msk_init_yukon: 7 msk_init_yukon: 8 msk_init_yukon: 9 msk_init_yukon: 10 msk_init_yukon: 11 msk_init_yukon: 12 msk_init_yukon: end msk_attach: 1 eephy0 at msk0 phy 0: Marvell 88E3082 10/100 PHY, rev. 3 ukphy0 at msk0 phy 3: Generic IEEE 802.3u media interface, rev. 0: OUI 0x121012, model 0x0004 ukphy0: no media present ukphy1 at msk0 phy 6: Generic IEEE 802.3u media interface, rev. 0: OUI 0x004c00, model 0x0013 ukphy1: no media present msk_attach: end ppb1 at pci0 dev 28 function 1 "Intel 82801GB PCIE" rev 0x02 pci2 at ppb1 bus 2 ppb2 at pci0 dev 28 function 2 "Intel 82801GB PCIE" rev 0x02 pci3 at ppb2 bus 3 wpi0 at pci3 dev 0 function 0 "Intel PRO/Wireless 3945ABG" rev 0x02: apic 2 int 18 (irq 11), address 00:18:de:ad:3e:96 ppb3 at pci0 dev 28 function 3 "Intel 82801GB PCIE" rev 0x02 pci4 at ppb3 bus 4 uhci0 at pci0 dev 29 function 0 "Intel 82801GB USB" rev 0x02: apic 2 int 23 (irq 5) uhci1 at pci0 dev 29 function 1 "Intel 82801GB USB" rev 0x02: apic 2 int 17 (irq 3) uhci2 at pci0 dev 29 function 2 "Intel 82801GB USB" rev 0x02: apic 2 int 18 (irq 11) uhci3 at pci0 dev 29 function 3 "Intel 82801GB USB" rev 0x02: apic 2 int 16 (irq 7) ehci0 at pci0 dev 29 function 7 "Intel 82801GB USB" rev 0x02: apic 2 int 23 (irq 5) ehci0: timed out waiting for BIOS usb0 at ehci0: USB revision 2.0 uhub0 at usb0 uhub0: Intel EHCI root hub, rev 2.00/1.00, addr 1 uhub0: 8 ports with 8 removable, self powered ppb4 at pci0 dev 30 function 0 "Intel 82801BAM Hub-to-PCI" rev 0xe2 pci5 at ppb4 bus 5 cbb0 at pci5 dev 3 function 0 "TI PCIXX12 CardBus" rev 0x00: apic 2 int 16 (irq 255) vendor "TI", unknown product 0x803a (class serial bus subclass Firewire, rev 0x00) at pci5 dev 3 function 1 not configured "TI PCIXX12 Multimedia Card Reader" rev 0x00 at pci5 dev 3 function 2 not configured cbb0: bad Vcc request. sock_ctrl 0xffffff88, sock_status 0xffffffff cardslot0 at cbb0 slot 0 flags 0 cardbus0 at cardslot0: bus 6 device 0 cacheline 0x10, lattimer 0x20 pcmcia0 at cardslot0 ichpcib0 at pci0 dev 31 function 0 "Intel 82801GBM LPC" rev 0x02: PM disabled pciide0 at pci0 dev 31 function 1 "Intel 82801GB IDE" rev 0x02: DMA, channel 0 configured to compatibility, channel 1 configured to compatibility atapiscsi0 at pciide0 channel 0 drive 0 scsibus0 at atapiscsi0: 2 targets cd0 at scsibus0 targ 0 lun 0: <PIONEER, DVD-RW DVR-K16M, 1.10> SCSI0 5/cdrom removable cd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2 pciide0: channel 1 ignored (disabled) pciide1 at pci0 dev 31 function 2 "Intel 82801GBM SATA" rev 0x02: DMA, channel 0 configured to native-PCI, channel 1 configured to native-PCI pciide1: using apic 2 int 19 (irq 10) for native-PCI interrupt wd0 at pciide1 channel 0 drive 0: <HTS541010G9SA00> wd0: 16-sector PIO, LBA48, 95396MB, 195371568 sectors wd0(pciide1:0:0): using PIO mode 4, Ultra-DMA mode 5 ichiic0 at pci0 dev 31 function 3 "Intel 82801GB SMBus" rev 0x02: apic 2 int 19 (irq 10) iic0 at ichiic0 usb1 at uhci0: USB revision 1.0 uhub1 at usb1 uhub1: Intel UHCI root hub, rev 1.00/1.00, addr 1 uhub1: 2 ports with 2 removable, self powered usb2 at uhci1: USB revision 1.0 uhub2 at usb2 uhub2: Intel UHCI root hub, rev 1.00/1.00, addr 1 uhub2: 2 ports with 2 removable, self powered usb3 at uhci2: USB revision 1.0 uhub3 at usb3 uhub3: Intel UHCI root hub, rev 1.00/1.00, addr 1 uhub3: 2 ports with 2 removable, self powered usb4 at uhci3: USB revision 1.0 uhub4 at usb4 uhub4: Intel UHCI root hub, rev 1.00/1.00, addr 1 uhub4: 2 ports with 2 removable, self powered isa0 at ichpcib0 isadma0 at isa0 pckbc0 at isa0 port 0x60/5 pckbd0 at pckbc0 (kbd slot) pckbc0: using irq 1 for kbd slot wskbd0 at pckbd0: console keyboard, using wsdisplay0 pms0 at pckbc0 (aux slot) pckbc0: using irq 12 for aux slot wsmouse0 at pms0 mux 0 pcppi0 at isa0 port 0x61 midi0 at pcppi0: <PC speaker> spkr0 at pcppi0 npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16 pctr: 686-class user-level performance counters enabled mtrr: Pentium Pro MTRR support uhidev0 at uhub1 port 1 configuration 1 interface 0 uhidev0: Logitech USB RECEIVER, rev 1.10/25.10, addr 2, iclass 3/1 ums0 at uhidev0: 16 buttons and Z dir. wsmouse1 at ums0 mux 0 dkcsum: wd0 matches BIOS drive 0x80 root on wd0a swap on wd0b dump on wd0b rootdev=0x0 rrootdev=0x300 rawdev=0x302 msk_init msk_stop msk_init_yukon: start: sk_csr=0xa603154a msk_init_yukon: 1 msk_init_yukon: gmac_ctrl=0x5a msk_init_yukon: 3 msk_init_yukon: 4 msk_init_yukon: 4a msk_init_yukon: YUKON_PAR=0 msk_init_yukon: YUKON_PAR=0x20 msk_init_yukon: 4b msk_init_yukon: 5 msk_init_yukon: 7 msk_init_yukon: 8 msk_init_yukon: 9 msk_init_yukon: 10 msk_init_yukon: 11 msk_init_yukon: 12 msk_init_yukon: end msk_start msk_encap msk_encap: dm_nsegs=1 msk_encap: completed successfully msk_txeof msk_start msk_encap msk_encap: dm_nsegs=1 msk_encap: completed successfully msk_txeof -- giovanni