Hi OpenBSD community!
I built a small ethernet network with Windows and Linux boxes and an
OpenBSD router which is connected to the www via dsl.
The problem is that the upload speed from an intranet box to the BSD
server (over scp for example) is quite ok (about 13 MBit/s) but the
download speed is rather slow (about 1 MBit/s). Why?
I used ethereal to get a tcp dump and plottet the results (x-axis ->
time, y-axis -> number of bytes). For about a second I get full download
speed but then there is a period of 15 seconds where the connection
seems to be stalled. After 15 seconds the connection works for 1 second
at full speed and so on. As a result the diagram looks like a stair.
Now I'm going to tell you what I have tried to solve the
problem...without any success.
- samba shows the same behaviour
- disconnected the switch (100Mbit) and made a direct connection to the
server
- changed RJ45 cable
- switched network cards from Realtek 8139 (100Mbit) to Realtek 8029 (10Mbit;
works fine for pppoe) (I know they are of poor quality!)
- changed media type manually from 100baseTX full duplex to 100baseTX to
10baseT full duplex to 10baseT
- killed pf; killed ppp
- processor load is ok during download
- same behaviour if server is accessed from a windows or a linux box
(both of them have 100Mbit NICs)
I have found some old threads (OpenBSD 2.x) concerning the same problem
but not any solution up to now. So if you have any further idea, please
tell me.
Thanks in advance!
Jo
dmesg:
---------------------------------------------------------------------------
OpenBSD 3.7 (GENERIC) #50: Sun Mar 20 00:01:57 MST 2005
[EMAIL PROTECTED]:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: Intel Pentium II ("GenuineIntel" 686-class, 512KB L2 cache) 401 MHz
cpu0:
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR
real mem = 267952128 (261672K)
avail mem = 237731840 (232160K)
using 3296 buffers containing 13500416 bytes (13184K) of memory
mainbus0 (root)
bios0 at mainbus0: AT/286+(26) BIOS, date 01/11/01, BIOS32 rev. 0 @ 0xfb130
apm0 at bios0: Power Management spec V1.2
apm0: AC on, battery charge unknown
pcibios0 at bios0: rev 2.1 @ 0xf0000/0xb5ac
pcibios0: PCI IRQ Routing Table rev 1.0 @ 0xfdbf0/144 (7 entries)
pcibios0: PCI Exclusive IRQs: 10 11
pcibios0: PCI Interrupt Router at 000:07:0 ("VIA VT82C596A ISA" rev 0x00)
pcibios0: PCI bus #1 is the last bus
bios0: ROM list: 0xc0000/0xc800
cpu0 at mainbus0
pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
pchb0 at pci0 dev 0 function 0 "VIA VT82C691 PCI" rev 0x06
ppb0 at pci0 dev 1 function 0 "VIA VT82C598 AGP" rev 0x00
pci1 at ppb0 bus 1
vga1 at pci1 dev 0 function 0 "Nvidia GeForce2 MX" rev 0xb2
wsdisplay0 at vga1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
pcib0 at pci0 dev 7 function 0 "VIA VT82C596A ISA" rev 0x07
pciide0 at pci0 dev 7 function 1 "VIA VT82C571 IDE" rev 0x06: ATA33, channel 0
configured to compatibility, channel 1 configured to compatibility
wd0 at pciide0 channel 0 drive 0: <Maxtor 54098H8>
wd0: 16-sector PIO, LBA, 39082MB, 80041248 sectors
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2
atapiscsi0 at pciide0 channel 1 drive 0
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <LG, CD-ROM CRD-8400B, 1.00> SCSI0 5/cdrom
removable
cd0(pciide0:1:0): using PIO mode 4, DMA mode 2
"VIA VT82C596 Power Mgmt" rev 0x00 at pci0 dev 7 function 3 not configured
ne3 at pci0 dev 11 function 0 "Realtek 8029" rev 0x00: irq 10
ne3: address 00:00:1c:0b:4c:54
rl0 at pci0 dev 12 function 0 "Realtek 8139" rev 0x10: irq 11 address
00:30:84:41:d6:e1
rlphy0 at rl0 phy 0: RTL internal phy
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0 (mux 1 ignored for console): console keyboard, using wsdisplay0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
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
pccom1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
isapnp0 at isa0 port 0x279: read port 0x203
sb1 at isapnp0 "Analog Devices AD1816A, ADS7180, , " port
0x220/16,0x388/4,0x500/16 irq 5 drq 1,0: dsp v3.02
midi1 at sb1: <SB MIDI UART>
audio0 at sb1
opl0 at sb1: model OPL3
midi2 at opl0: <SB Yamaha OPL3>
mpu0 at isapnp0 "Analog Devices AD1816A, ADS7181, PNPB006, " port 0x300/2 irq 9
mpu0: Analog Devices AD1816A
midi3 at mpu0: <MPU-401 MIDI UART>
joy0 at isapnp0 "Analog Devices AD1816A, ADS7182, PNPB02F, " port 0x200/8
biomask f145 netmask fd45 ttymask fdc7
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
wd0(pciide0:0:0): timeout
type: ata
c_bcount: 512
c_skip: 0
wd0e: DMA error writing fsbn 2651200 of 2651200-2651211 (wd0 bn 3819472; cn
3789 tn 2 sn 34), retrying
wd0: soft error (corrected)
wd0(pciide0:0:0): timeout
type: ata
c_bcount: 0
c_skip: 0
wd0(pciide0:0:0): timeout
type: ata
c_bcount: 512
c_skip: 0
wd0(pciide0:0:0): timeout
type: ata
c_bcount: 8192
c_skip: 0
wd0e: device timeout writing fsbn 2651200 of 2651200-2651215 (wd0 bn 3819472;
cn 3789 tn 2 sn 34), retrying
wd0: soft error (corrected)
wd0(pciide0:0:0): timeout
type: ata
c_bcount: 512
c_skip: 0
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