My server synchronizes data with another server in a different location =
 =

over the internet (dsl 128kbit/sec) at regular intervals. I use ssh to  =

tunnel through the intenet. The software used is rsync and / or unison. =
 =

The server is connected to the internet over a hardware router (ASUS  =

WL500g).

Whenever the system is actively transferring data, is responds very  =

sluggishly to requests form the LAN: starting Midnight Commander on the =
 =

server takes about 30 sec, opening an Explorer window on a samba client =
 =

(WinXP or OSX) takes something between 15 sec and 60 sec. Normally eithe=
r  =

of these commands are finished in just 2 sec.

The system seems not to be loaded: 'top' shows load-averages is well bel=
ow  =

1 and an idle of over 90%. The process that does the synchronizatiuon  =

utilizes about 1% CPU. 'systat vmstat' shows hardly any swapping or  =

paging. 'systat iostat' shows no disk-activity beyond the data-stream to=
  =

and from the interet.

I think NetBSD is supposed to be able to handle many network-connections=
  =

simultaneously. Is this at all a network problem or is maybe ssh cloggin=
g  =

something in the kernel? The server does have a software-RAID5 array  =

(Promise IDE controller in PCIbus), but the synchronization pertains onl=
y  =

to the drive where the NetBSD system resides (onboard PIIXIDE).

Does anybody have an idea, how to remedy this problem?

Below is the output from dmesg.

Regards
Thomas

---dmesg---------------------
NetBSD 3.0 (GENERIC) #0: Mon Dec 19 01:04:02 UTC 2005
         builds@works.netbsd.org:/home/builds/ab/netbsd-3-0-RELEASE/i386=
/200512182024Z-obj/home/builds/ab/netbsd-3-0-RELEASE/src/sys/arch/i386/c=
ompile/GENERIC
total memory =3D 255 MB
avail memory =3D 241 MB
BIOS32 rev. 0 found at 0xf0520
mainbus0 (root)
cpu0 at mainbus0: (uniprocessor)
cpu0: Intel Pentium II (686-class), 350.81 MHz, id 0x652
cpu0: features 183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR>
cpu0: features 183f9ff<PGE,MCA,CMOV,PAT,PSE36,MMX>
cpu0: features 183f9ff<FXSR>
cpu0: I-cache 16 KB 32B/line 4-way, D-cache 16 KB 32B/line 4-way
cpu0: L2 cache 512 KB 32B/line 4-way
cpu0: ITLB 32 4 KB entries 4-way, 2 4 MB entries fully associative
cpu0: DTLB 64 4 KB entries 4-way, 8 4 MB entries 4-way
cpu0: 32 page colors
pci0 at mainbus0 bus 0: configuration mode 1
pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
pchb0 at pci0 dev 0 function 0
pchb0: Intel 82443BX Host Bridge/Controller (rev. 0x03)
agp0 at pchb0: aperture at 0xe4000000, size 0x4000000
ppb0 at pci0 dev 1 function 0: Intel 82443BX AGP Interface (rev. 0x03)
pci1 at ppb0 bus 1
pci1: i/o space, memory space enabled
pcib0 at pci0 dev 4 function 0
pcib0: Intel 82371AB (PIIX4) PCI-ISA Bridge (rev. 0x02)
piixide0 at pci0 dev 4 function 1
piixide0: Intel 82371AB IDE controller (PIIX4) (rev. 0x01)
piixide0: bus-master DMA support present
piixide0: primary channel wired to compatibility mode
piixide0: primary channel interrupting at irq 14
atabus0 at piixide0 channel 0
piixide0: secondary channel wired to compatibility mode
piixide0: secondary channel interrupting at irq 15
atabus1 at piixide0 channel 1
uhci0 at pci0 dev 4 function 2: Intel 82371AB (PIIX4) USB Host Controlle=
r  =

(rev. 0x01)
uhci0: interrupting at irq 12
usb0 at uhci0: USB revision 1.0
uhub0 at usb0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
Intel 82371AB (PIIX4) Power Management Controller (miscellaneous bridge,=
  =

revision 0x02) at pci0 dev 4 function 3 not configured
pdcide0 at pci0 dev 9 function 0
pdcide0: Promise Ultra133/ATA Bus Master IDE Accelerator (rev. 0x02)
pdcide0: bus-master DMA support present
pdcide0: primary channel configured to native-PCI mode
pdcide0: using irq 12 for native-PCI interrupt
atabus2 at pdcide0 channel 0
pdcide0: secondary channel configured to native-PCI mode
atabus3 at pdcide0 channel 1
ex0 at pci0 dev 11 function 0: 3Com 3c905-TX 10/100 Ethernet (rev. 0x0)
ex0: interrupting at irq 10
ex0: MAC address 00:10:4b:98:20:e3
nsphy0 at ex0 phy 24: DP83840 10/100 media interface, rev. 1
nsphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
vga1 at pci0 dev 12 function 0: Matrox MGA Mystique 1064SG (rev. 0x02)
wsdisplay0 at vga1 kbdmux 1: console (80x25, vt100 emulation)
wsmux1: connecting to wsdisplay0
isa0 at pcib0
lpt0 at isa0 port 0x378-0x37b irq 7
com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, working fifo
com1 at isa0 port 0x2f8-0x2ff irq 3: ns16550a, working fifo
pckbc0 at isa0 port 0x60-0x64
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
sysbeep0 at pcppi0
isapnp0 at isa0 port 0x279: ISA Plug 'n Play device support
npx0 at isa0 port 0xf0-0xff: using exception 16
isapnp0: no ISA Plug 'n Play devices found
Kernelized RAIDframe activated
wd0 at atabus0 drive 0: <WDC WD1800JB-00DUA3>
wd0: drive supports 16-sector PIO transfers, LBA48 addressing
wd0: 167 GB, 348861 cyl, 16 head, 63 sec, 512 bytes/sect x 351651888  =

sectors
wd0: 32-bit data port
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)=

wd0(piixide0:0:0): using PIO mode 4, Ultra-DMA mode 2 (Ultra/33) (using =
 =

DMA)
atapibus0 at atabus1: 2 targets
cd0 at atapibus0 drive 0: <SAMSUNG DVD-ROM SD-616F, , F103> cdrom remova=
ble
cd0: 32-bit data port
cd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 2 (Ultra/33)
cd0(piixide0:1:0): using PIO mode 4, Ultra-DMA mode 2 (Ultra/33) (using =
 =

DMA)
wd1 at atabus2 drive 0: <SAMSUNG SP1213N>
wd1: drive supports 16-sector PIO transfers, LBA48 addressing
wd1: 111 GB, 232632 cyl, 16 head, 63 sec, 512 bytes/sect x 234493056  =

sectors
wd1: 32-bit data port
wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)=

wd2 at atabus2 drive 1: <SAMSUNG SP1213N>
wd2: drive supports 16-sector PIO transfers, LBA48 addressing
wd2: 111 GB, 232632 cyl, 16 head, 63 sec, 512 bytes/sect x 234493056  =

sectors
wd2: 32-bit data port
wd2: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)=

wd1(pdcide0:0:0): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) (using =
 =

DMA)
wd2(pdcide0:0:1): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) (using =
 =

DMA)
wd3 at atabus3 drive 0: <SAMSUNG SP1213N>
wd3: drive supports 16-sector PIO transfers, LBA48 addressing
wd3: 111 GB, 232632 cyl, 16 head, 63 sec, 512 bytes/sect x 234493056  =

sectors
wd3: 32-bit data port
wd3: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)=

wd4 at atabus3 drive 1: <SAMSUNG SP1213N>
wd4: drive supports 16-sector PIO transfers, LBA48 addressing
wd4: 111 GB, 232632 cyl, 16 head, 63 sec, 512 bytes/sect x 234493056  =

sectors
wd4: 32-bit data port
wd4: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)=

wd3(pdcide0:1:0): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) (using =
 =

DMA)
wd4(pdcide0:1:1): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) (using =
 =

DMA)
raid0: RAID Level 1
raid0: Components: /dev/wd1a /dev/wd2a
raid0: Total Sectors: 4096384 (2000 MB)
raid1: RAID Level 5
raid1: Components: /dev/wd1e /dev/wd2e /dev/wd4e /dev/wd3e
raid1: Total Sectors: 690399936 (337109 MB)
boot device: wd0
root on wd0a dumps on wd0b
root file system type: ffs
wsdisplay0: screen 1 added (80x25, vt100 emulation)
wsdisplay0: screen 2 added (80x25, vt100 emulation)
wsdisplay0: screen 3 added (80x25, vt100 emulation)
wsdisplay0: screen 4 added (80x25, vt100 emulation)


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