I have three machines that I'm using for testing network performance:
- 2.0GHz Pentium 4, 256MiB RAM, Ubuntu 6.06, e1000
- 266MHz Pentium II, 192MiB RAM, Debian Unstable, sk98lin
- 600MHz Pentium M, 256MiB RAM, OpenBSD 4.0-current, em(4)
All network settings are still at their respective defaults.
First, I connected the two Linux boxes with an Ethernet cable and ran
``iperf -s'' on the 2.0GHz machine and ``iperf -c 192.168.10.1'' on the
266MHz machine, and iperf reported a bandwidth of about 224 Mbits/sec.
Then, I substituted out the 266MHz machine and replaced it with the
600MHz machine (i.e., faster processor, more ram, and better software),
but running ``iperf -c 192.168.10.1'' under OpenBSD reported a mere
3.8 Mbits/sec---nearly two orders of magnitude less!
Can anyone explain the huge discrepancy here? Can I do anything to get
OpenBSD to achieve at least 150 Mbits/sec?
Thanks.
(I've omitted the Linux dmesgs, but can provide them if they would be
considered useful and not just line noise.)
OpenBSD 4.0-beta (GENERIC) #1055: Thu Aug 3 11:39:24 MDT 2006
[EMAIL PROTECTED]:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: Intel(R) Pentium(R) M processor 1.10GHz ("GenuineIntel" 686-class)
599 MHz
cpu0:
FPU,V86,DE,PSE,TSC,MSR,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,TM,SBF,EST,TM2
cpu0: Enhanced SpeedStep 600 MHz (812 mV): speeds: 1100, 1000, 900, 800,
600 MHz
real mem = 258437120 (252380K)
avail mem = 228171776 (222824K)
using 3180 buffers containing 13025280 bytes (12720K) of memory
mainbus0 (root)
bios0 at mainbus0: AT/286+(77) BIOS, date 06/15/05, BIOS32 rev. 0 @
0xfd740, SMBIOS rev. 2.33 @ 0xe0010 (56 entries)
bios0: IBM 2371BMU
apm0 at bios0: Power Management spec V1.2
apm0: battery life expectancy 35%
apm0: AC off, battery charge high, estimated 1:42 hours
apm0: flags 30102 dobusy 0 doidle 1
pcibios0 at bios0: rev 2.1 @ 0xfd6d0/0x930
pcibios0: PCI IRQ Routing Table rev 1.0 @ 0xfdeb0/256 (14 entries)
pcibios0: PCI Interrupt Router at 000:31:0 ("Intel 82371FB ISA" rev
0x00)
pcibios0: PCI bus #2 is the last bus
bios0: ROM list: 0xc0000/0xc800! 0xcc800/0x1000 0xcd800/0x1000
0xdc000/0x4000! 0xe0000/0x10000
cpu0 at mainbus0
pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
pchb0 at pci0 dev 0 function 0 "Intel 82852GM Hub-PCI" rev 0x02
"Intel 82852GM Memory" rev 0x02 at pci0 dev 0 function 1 not configured
"Intel 82852GM Configuration" rev 0x02 at pci0 dev 0 function 3 not
configured
vga1 at pci0 dev 2 function 0 "Intel 82852GM AGP" rev 0x02: aperture at
0xe0000000, size 0x8000000
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
"Intel 82852GM AGP" rev 0x02 at pci0 dev 2 function 1 not configured
uhci0 at pci0 dev 29 function 0 "Intel 82801DB USB" rev 0x01: irq 11
usb0 at uhci0: USB revision 1.0
uhub0 at usb0
uhub0: Intel UHCI root hub, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhci1 at pci0 dev 29 function 1 "Intel 82801DB USB" rev 0x01: irq 11
usb1 at uhci1: 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
uhci2 at pci0 dev 29 function 2 "Intel 82801DB USB" rev 0x01: irq 11
usb2 at uhci2: 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
ehci0 at pci0 dev 29 function 7 "Intel 82801DB USB" rev 0x01: irq 11
usb3 at ehci0: USB revision 2.0
uhub3 at usb3
uhub3: Intel EHCI root hub, rev 2.00/1.00, addr 1
uhub3: 6 ports with 6 removable, self powered
ppb0 at pci0 dev 30 function 0 "Intel 82801BAM Hub-to-PCI" rev 0x81
pci1 at ppb0 bus 1
cbb0 at pci1 dev 0 function 0 "Ricoh 5C476 CardBus" rev 0x8d: irq 11
sdhc0 at pci1 dev 0 function 1 "Ricoh 5C822 SD/MMC" rev 0x13: irq 11
sdmmc0 at sdhc0
em0 at pci1 dev 1 function 0 "Intel PRO/1000MT Mobile (82541GI)" rev
0x00: irq 11, address 00:0a:e4:37:61:6a
iwi0 at pci1 dev 2 function 0 "Intel PRO/Wireless 2200BG" rev 0x05: irq
11, address 00:13:ce:58:8f:14
cardslot0 at cbb0 slot 0 flags 0
cardbus0 at cardslot0: bus 2 device 0 cacheline 0x0, lattimer 0xb0
pcmcia0 at cardslot0
ichpcib0 at pci0 dev 31 function 0 "Intel 82801DBM LPC" rev 0x01
pciide0 at pci0 dev 31 function 1 "Intel 82801DBM IDE" rev 0x01: DMA,
channel 0 configured to compatibility, channel 1 configured to
compatibility
wd0 at pciide0 channel 0 drive 0: <HTC426030G7AT00>
wd0: 16-sector PIO, LBA, 28615MB, 58605120 sectors
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5
pciide0: channel 1 disabled (no drives)
ichiic0 at pci0 dev 31 function 3 "Intel 82801DB SMBus" rev 0x01: irq 11
iic0 at ichiic0
auich0 at pci0 dev 31 function 5 "Intel 82801DB AC97" rev 0x01: irq 11,
ICH4 AC97
ac97: codec id 0x41445374 (Analog Devices AD1981B)
ac97: codec features headphone, 20 bit DAC, No 3D Stereo
audio0 at auich0
"Intel 82801DB Modem" rev 0x01 at pci0 dev 31 function 6 not configured
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
aps0 at isa0 port 0x1600/31
npx0 at isa0 port 0xf0/16: using exception 16
biomask effd netmask effd ttymask ffff
pctr: 686-class user-level performance counters enabled
mtrr: Pentium Pro MTRR support
dkcsum: wd0 matches BIOS drive 0x80
root on wd0a
rootdev=0x0 rrootdev=0x300 rawdev=0x302
