After intense downloads/uploads, syslogd says:

Apr 1 22:10:11 s /bsd: dc0: TX underrun -- increasing TX threshold
Apr 1 22:10:22 s /bsd: dc0: TX underrun -- increasing TX threshold
Apr 2 10:02:59 s /bsd: dc0: TX underrun -- using store and forward mode

Then the network becomes unreachable. sendto() returns "no buffer space available".
Load increases to 90%.

How can I tweak the kernel to prevent this?

Here is my dmesg:

OpenBSD 2.8-stable (SILICON) #0: Mon Mar 5 15:39:04 PST 200
    rootsilicon:/usr/src/sys/arch/i386/compile/SILICON
cpu0: Intel Pentium II (Celeron) ("GenuineIntel" 686-class, 128KB L2 cache) 401 MHz
cpu0: FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,SYS,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR
real mem = 133804032 (130668K)
avail mem = 121602048 (118752K)
using 1658 buffers containing 6791168 bytes (6632K) of memory
mainbus0 (root)
bios0 at mainbus0: AT/286+(47) BIOS, date 04/20/99, BIOS32 rev. 0 0xfb290
apm0 at bios0: Power Management spec V1.2
apm0: AC on, battery charge unknown
pcibios0 at bios0: rev. 2.1 found at 0xf0000[0xb70c]
pcibios0: PCI IRQ Routing Table rev. 1.0 found at 0xfdcc0, size 144 bytes (7 entries)
pcibios0: PCI Interrupt Router at 000:07:0 ("VIA VT82C596A (Apollo Pro) PCI-ISA" rev 0x00)
pcibios0: PCI Exclusive IRQs: 10 11
pci_intr_fixup: no compatible PCI ICU found: ICU vendor 0x1106 product 0x0596
pcibios0: Warning, unable to fix up PCI interrupt routing
pcibios0: PCI bus #1 is the last bus
pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
pchb0 at pci0 dev 0 function 0 "VIA VT82C691 (Apollo Pro) Host-PCI" rev 0x06
ppb0 at pci0 dev 1 function 0 "VIA VT82C598 (Apollo MVP3) PCI-AGP" rev 0x00
pci1 at ppb0 bus 1
pcib0 at pci0 dev 7 function 0 "VIA VT82C596A (Apollo Pro) PCI-ISA" rev 0x07
pciide0 at pci0 dev 7 function 1 "VIA VT82C586A IDE" rev 0x06: DMA, channel 0 configured to compatibility, channel 1 configured to compatibility
atapiscsi0 at pciide0 channel 0
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 1 lun 0: <MITSUMI, CD-ROM FX810T4!B, a03> SCSI0 5/cdrom removable
cd0: can use 32-bit, PIO mode 3, DMA mode 1
wd0 at pciide0 channel 0 drive 0: <ST317221A>
wd0: can use 32-bit, PIO mode 4, DMA mode 2, Ultra-DMA mode 2
wd0: 32-sector PIO, LBA, 16446MB, 16383 cyl, 16 head, 63 sec, 33683328 sectors
pciide0: channel 0 interrupting at irq 14
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2 (using DMA data transfers)
cd0(pciide0:0:1): using PIO mode 3, DMA mode 1 (using DMA data transfers)
pchb1 at pci0 dev 7 function 3 "VIA VT82C596 Power Management" rev 0x00
"Alliance Semiconductor AT22" rev 0x00 at pci0 dev 8 function 0 not configured
dc0 at pci0 dev 9 function 0 "ADMtek AN983" rev 0x11: irq 11 address 00:20:78:12:9c:8b
ukphy0 at dc0 phy 1: Generic IEEE 802.3u media interface
ukphy0: OUI 0x000895, model 0x0001, rev. 0
rl0 at pci0 dev 10 function 0 "Realtek 8139" rev 0x10: irq 10 address 00:00:e8:54:eb:99
amphy0 at rl0 phy 0: Am79C873 10/100 media interface, rev. 0
isa0 at pcib0
isadma0 at isa0
pcppi0 at isa0 port 0x61
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
pcvt: got KEYB_R_RESEND
pcvt: no kbd detected
vt0 at isa0 port 0x60/16 irq 1: vga 80 col, color, 8 scr, unknown kbd
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
biomask 4040 netmask 4c40 ttymask 4cc2
pctr: 686-class user-level performance counters enabled
mtrr: Pentium Pro MTRR support
dkcsum: wd0 matched BIOS disk 80
root on wd0a
rootdev=0x0 rrootdev=0x300 rawdev=0x302

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]