Hi,
upgraded a box from 3.8 stable to 4.4 snapshot and am wondering now,
why it is hogged with interrupts when i run tcpdump on em0. According
to vmstat iterrupt rate is more or less the following:
$ vmstat -i
interrupt total rate
irq10/em0 399560 330
irq11/em1 5 0
irq14/pciide0 1269 1
irq15/pciide0 136 0
irq5/vr0 1659 1
irq0/clock 120799 99
irq8/rtc 154617 127
Total 678045 561
$
The traffic going to em0 is (taken from the cisco here):
30 second output rate 569104000 bits/sec, 125107 packets/sec
that must be a lot, but 3.8 stable has been handling 960 Mbps on the
same link. Yes 3.8 stable was losing frames but interrupt load was
under 30% and the system was pretty responsive. Now the box nearly
freezes, other processes get delayed seriously, load goes up to 20. It
does not matter whether tcpdump writes to disk or just to /dev/null,
so it more seems to be related to em driver. What could be the cause?
It would be real pity to go back to 3.8, since there are nice features
and fixes that came in during the three years...
I don't know if ifconfig output gives anything useful and dmesg is
traditionally at the end. Thanks in advance.
$ ifconfig
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 33204
groups: lo
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x5
em0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
lladdr 00:0e:0c:05:0c:3f
media: Ethernet autoselect (1000baseT full-duplex,rxpause)
status: active
inet6 fe80::20e:cff:fe05:c3f%em0 prefixlen 64 scopeid 0x1
em1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
lladdr 00:0e:0c:05:0c:9c
media: Ethernet autoselect (100baseTX full-duplex)
status: active
inet6 fe80::20e:cff:fe05:c9c%em1 prefixlen 64 scopeid 0x2
vr0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
lladdr 00:0a:e6:22:2e:a5
groups: egress
media: Ethernet autoselect (100baseTX full-duplex)
status: active
inet 10.110.16.245 netmask 0xffffff00 broadcast 10.110.16.255
inet6 fe80::20a:e6ff:fe22:2ea5%vr0 prefixlen 64 scopeid 0x3
enc0: flags=0<> mtu 1536
pflog0: flags=141<UP,RUNNING,PROMISC> mtu 33204
groups: pflog
$
OpenBSD 4.4-current (GENERIC) #1480: Tue Nov 11 19:56:54 MST 2008
[EMAIL PROTECTED]:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: Intel(R) Celeron(R) CPU 1.70GHz ("GenuineIntel" 686-class) 1.71 GHz
cpu0:
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM
real mem = 251162624 (239MB)
avail mem = 234262528 (223MB)
mainbus0 at root
bios0 at mainbus0: AT/286+ BIOS, date 06/27/02, BIOS32 rev. 0 @
0xfdad0, SMBIOS rev. 2.3 @ 0xf0630 (19 entries)
bios0: vendor American Megatrends Inc. version "07.00T" date 04/02/01
bios0: ECS P4VMM2
apm at bios0 function 0x15 not configured
acpi0 at bios0: rev 0
acpi0: tables DSDT FACP
acpi0: wakeup devices UAR1(S4) USB_(S4) USB1(S4) USB2(S4) AC9_(S4)
MC9_(S4) ILAN(S4) PCI0(S4) SLPB(S4)
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpiprt0 at acpi0: bus 0 (PCI0)
acpicpu0 at acpi0
acpibtn0 at acpi0: PWRB
acpibtn1 at acpi0: SLPB
bios0: ROM list: 0xc0000/0xc000 0xcc000/0x4000!
cpu0 at mainbus0: (uniprocessor)
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0 "VIA VT8751 PCI" rev 0x00
viaagp0 at pchb0v2,
agp0 at viaagp0: aperture at 0xe8000000, size 0xe400000
ppb0 at pci0 dev 1 function 0 "VIA VT8633 AGP" rev 0x00
pci1 at ppb0 bus 1
vga1 at pci1 dev 0 function 0 "S3 ProSavage DDR" rev 0x00
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
em0 at pci0 dev 9 function 0 "Intel PRO/1000MT (82541GI)" rev 0x00:
irq 10, address 00:0e:0c:05:0c:3f
em1 at pci0 dev 11 function 0 "Intel PRO/1000MT (82541GI)" rev 0x00:
irq 11, address 00:0e:0c:05:0c:9c
viapm0 at pci0 dev 17 function 0 "VIA VT8233 ISA" rev 0x00
iic0 at viapm0
spdmem0 at iic0 addr 0x50: 256MB SDRAM non-parity PC133CL2
pciide0 at pci0 dev 17 function 1 "VIA VT82C571 IDE" rev 0x06: ATA100,
channel 0 configured to compatibility, channel 1 config
ured to compatibility
wd0 at pciide0 channel 0 drive 0: <MAXTOR 6L040J2>
wd0: 16-sector PIO, LBA, 38172MB, 78177792 sectors
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5
wd1 at pciide0 channel 1 drive 0: <Maxtor 7L300R0>
wd1: 16-sector PIO, LBA48, 286188MB, 586114704 sectors
wd1(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 5
vr0 at pci0 dev 18 function 0 "VIA RhineII-2" rev 0x70: irq 5, address
00:0a:e6:22:2e:a5
ukphy0 at vr0 phy 1: Generic IEEE 802.3u media interface, rev. 5: OUI
0x004063, model 0x0032
isa0 at mainbus0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
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
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
spkr0 at pcppi0
it0 at isa0 port 0x2e/2: IT8705F rev 2, EC port 0x290
npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
biomask f1cd netmask fded ttymask ffff
mtrr: Pentium Pro MTRR support
softraid0 at root
root on wd0a swap on wd0b dump on wd0b
