Dear readers,
As mentioned on http://teg.homeunix.org/sis900.html and
http://www.latzinator.com/acer_aspire_1705SMi.html there is a problem
with bandwidth for the SiS900 onboard NIC. I allways use vanilla kernels
and I'm having had this problem from 2.4.22 to 2.4.24 and from 2.6.2 to
2.6.6.
The symptom is easy to explain. I connect the PC to a 100MBit switch and
no matter which method of transfer (ftp, scp, samba, nfs) I use, I get a
maximum transfer rate of less than 400kB/s. By accident I found a dirty
workaround that might be a hint for some tech savvy hackers: if I force
the NIC to use halfduplex (allthough it's connected to a switch) it
works like expected (7-8 MB/s).
The only help I can be is that I can test new kernel drivers and send
you feedback.
Any help highly appreciated,
Thomas Latzelsberger
FYI:
about the Linux I use:
gentoo with vanilla kernel. no additional kernel patches.
hardware:
Acer Aspire 1705SMi, I run the P4 without HT (thus, no SMP related issue)
lspci:
00:00.0 Host bridge: Silicon Integrated Systems [SiS] 650 Host (rev 80)
00:01.0 PCI bridge: Silicon Integrated Systems [SiS] SiS 530 Virtual
PCI-to-PCI bridge (AGP)
00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS962 [MuTIOL
Media IO] (rev 14)
00:02.1 SMBus: Silicon Integrated Systems [SiS]: Unknown device 0016
00:02.3 FireWire (IEEE 1394): Silicon Integrated Systems [SiS] FireWire
Controller
00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE]
00:02.6 Modem: Silicon Integrated Systems [SiS] Intel 537 [56k Winmodem]
(rev a0)
00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS]
Sound Controller (rev a0)
00:03.0 USB Controller: Silicon Integrated Systems [SiS] USB 1.0
Controller (rev 0f)
00:03.1 USB Controller: Silicon Integrated Systems [SiS] USB 1.0
Controller (rev 0f)
00:03.2 USB Controller: Silicon Integrated Systems [SiS] USB 1.0
Controller (rev 0f)
00:03.3 USB Controller: Silicon Integrated Systems [SiS] USB 2.0 Controller
00:04.0 Ethernet controller: Silicon Integrated Systems [SiS] SiS900
10/100 Ethernet (rev 91)
00:0a.0 CardBus bridge: O2 Micro, Inc. OZ6912 Cardbus Controller
00:0b.0 Network controller: Harris Semiconductor: Unknown device 3872
(rev 01)
01:00.0 VGA compatible controller: nVidia Corporation: Unknown device
031a (rev a1)
uname -a:
Linux latzinator 2.6.6 #1 Mon May 10 14:45:51 CEST 2004 i686 Intel(R)
Pentium(R) 4 CPU 3.06GHz GenuineIntel GNU/Linux
dmesg:
:
d6a141a7ec3c38dfbd615a1162e1c7ba36b67858
pass
test 5 (64 bit key):
66a0949f8af7d6891f7f832ba833c00c892ebe30143ce28740011ecf
pass
test 6 (32 bit key):
d6a141a7ec3c38dfbd61
pass
test 7 (128 bit key):
697236591b5242b1
pass
testing arc4 ECB encryption across pages (chunking)
testing arc4 ECB decryption
test 1 (64 bit key):
0123456789abcdef
pass
test 2 (64 bit key):
0000000000000000
pass
test 3 (64 bit key):
0000000000000000
pass
test 4 (32 bit key):
0000000000000000000000000000000000000000
pass
test 5 (64 bit key):
123456789abcdef0123456789abcdef0123456789abcdef012345678
pass
test 6 (32 bit key):
00000000000000000000
pass
test 7 (128 bit key):
0123456789abcdef
pass
testing arc4 ECB decryption across pages (chunking)
testing sha384
test 1:
cb00753f45a35e8bb5a03d699ac65007272c32ab0eded1631a8b605a43ff5bed8086072ba1e7cc2358baeca134c825a7
pass
test 2:
3391fdddfc8dc7393707a65b1b4709397cf8b1d162af05abfe8f450de5f36bc6b0455a8520bc4e6f5fe95b1fe3c8452b
pass
test 3:
09330c33f71147e83d192fc782cd1b4753111b173b3b05d22fa08086e3b0f712fcc7c71a557e2db966c3e9fa91746039
pass
test 4:
3d208973ab3508dbbd7e2c2862ba290ad3010e4978c198dc4d8fd014e582823a89e16f9b2a7bbc1ac938e2d199e8bea4
pass
testing sha384 across pages
test 1:
3d208973ab3508dbbd7e2c2862ba290ad3010e4978c198dc4d8fd014e582823a89e16f9b2a7bbc1ac938e2d199e8bea4
pass
testing sha512
test 1:
ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f
pass
test 2:
204a8fc6dda82f0a0ced7beb8e08a41657c16ef468b228a8279be331a703c33596fd15c13b1b07f9aa1d3bea57789ca031ad85c7a71dd70354ec631238ca3445
pass
test 3:
8e959b75dae313da8cf4f72814fc143f8f7779c6eb9f7fa17299aeadb6889018501d289e4900f7e4331b99dec4b5433ac7d329eeb6dd26545e96e55b874be909
pass
test 4:
930d0cefcb30ff1133b6898121f1cf3d27578afcafe8677c5257cf069911f75d8f5831b56ebfda67b278e66dff8b84fe2b2870f742a580d8edb41987232850c9
pass
testing sha512 across pages
test 1:
930d0cefcb30ff1133b6898121f1cf3d27578afcafe8677c5257cf069911f75d8f5831b56ebfda67b278e66dff8b84fe2b2870f742a580d8edb41987232850c9
pass
testing deflate compression
test 1:
f3cacfcc53282d56c8cb2f5748cc4b5128ce482c4a5528c9485528ce4f2b290771bc082b0100
pass (ratio 70:38)
test 2:
5d8d310ec2301004bfb22fc81f10040989c2853f70b12ff824db67d947c1ef49681251ae7667d62719881ade85ab21f2085d161e20042dadf318a215852d69c4428323b66c89719befcf8b9fcf33ca2fed62a94c80ff13af5237ed0e526b5902d94ee87a761d0298fe8a8783a34f568ab89e8e5c57d3a079fa02
pass (ratio 191:122)
testing deflate decompression
test 1:
5468697320646f63756d656e7420646573637269626573206120636f6d7072657373696f6e206d6574686f64206261736564206f6e20746865204445464c415445636f6d7072657373696f6e20616c676f726974686d2e20205468697320646f63756d656e7420646566696e657320746865206170706c69636174696f6e206f6620746865204445464c41544520616c676f726974686d20746f20746865204950205061796c6f616420436f6d7072657373696f6e2050726f746f636f6c2e
pass (ratio 122:191)
test 2:
4a6f696e207573206e6f7720616e642073686172652074686520736f667477617265204a6f696e207573206e6f7720616e642073686172652074686520736f66747761726520
pass (ratio 38:70)
testing crc32c
testing crc32c initialized to 00000000: pass
testing crc32c setkey returns 12345678 : pass
testing crc32c using update/final:
0e2c157f:OK e980ebf6:OK de74bded:OK d579c862:OK ba979ad0:OK 2b29d913:OK
testing crc32c using incremental accumulator:
24c5d375:OK
testing crc32c using digest:
24c5d375:OK
pass
crc32c test complete
testing hmac_md5
test 1:
9294727a3638bb1c13f48ef8158bfc9d
pass
test 2:
750c783e6ab0b503eaa86e310a5db738
pass
test 3:
56be34521d144c88dbb8c733f0e8b3f6
pass
test 4:
697eaf0aca3a3aea3a75164746ffaa79
pass
test 5:
56461ef2342edc00f9bab995690efd4c
pass
test 6:
6b1ab7fe4bd7bf8f0b62e6ce61b9d0cd
pass
test 7:
6f630fad67cda0ee1fb1f562db3aa53e
pass
testing hmac_md5 across pages
test 1:
750c783e6ab0b503eaa86e310a5db738
pass
testing hmac_sha1
test 1:
b617318655057264e28bc0b6fb378c8ef146be00
pass
test 2:
effcdf6ae5eb2fa2d27416d5f184df9c259a7c79
pass
test 3:
125d7342b9ac11cd91a39af48aa17b4f63f175d3
pass
test 4:
4c9007f4026250c6bc8414f9bf50c86c2d7235da
pass
test 5:
4c1a03424b55e07fe7f27be1d58bb9324a9a5a04
pass
test 6:
aa4ae5e15272d00e95705637ce8a3b55ed402112
pass
test 7:
e8e99d0f45237d786d6bbaa7965c7808bbff1a91
pass
testing hmac_sha1 across pages
test 1:
effcdf6ae5eb2fa2d27416d5f184df9c259a7c79
pass
testing hmac_sha256
test 1:
a21b1f5d4cf4f73a4dd939750f7a066a7f98cc131cb16a6692759021cfab8181
pass
test 2:
104fdc1257328f08184ba73131c53caee698e36119421149ea8c712456697d30
pass
test 3:
470305fc7e40fe34d3eeb3e773d95aab73acf0fd060447a5eb4595bf33a9d1a3
pass
test 4:
198a607eb44bfbc69903a0f1cf2bbdc5ba0aa3f3d9ae3c1c7a3b1696a0b68cf7
pass
test 5:
5bdcc146bf60754e6a042426089575c75a003f089d2739839dec58b964ec3843
pass
test 6:
cdcb1220d1ecccea91e53aba3092f962e549fe6ce9ed7fdc43191fbde45c30b0
pass
test 7:
d4633c17f6fb8d744c66dee0f8f074556ec4af55ef07998541468eb49bd2e917
pass
test 8:
7546af01841fc09b1ab9c3749a5f1c17d4f589668a587b2700a9c97c1193cf42
pass
test 9:
6953025ed96f0c09f80a96f78e6538dbe2e7b820e3dd970e7ddd39091b32352f
pass
test 10:
6355ac22e890d0a3c8481a5ca4825bc884d3e7a1ff98a2fc2ac7d8e064c3b2e6
pass
testing hmac_sha256 across pages
test 1:
5bdcc146bf60754e6a042426089575c75a003f089d2739839dec58b964ec3843
pass
testing michael_mic
test 1:
82925c1ca1d130b8
pass
test 2:
434721ca40639b3f
pass
test 3:
e8f9becae97e5d29
pass
test 4:
90038fc6cf13c1db
pass
test 5:
d55e100510128986
pass
test 6:
0a942b124ecaa546
pass
testing michael_mic across pages
ACPI: AC Adapter [ACAD] (on-line)
ACPI: Battery Slot [BAT1] (battery absent)
ACPI: Power Button (FF) [PWRF]
ACPI: Lid Switch [LID]
ACPI: Sleep Button (CM) [SLPB]
ACPI: Processor [CPU0] (supports C1)
ACPI: Thermal Zone [THRM] (65 C)
Console: switching to colour frame buffer device 160x64
lp: driver loaded but no devices found
Real Time Clock Driver v1.12
Non-volatile memory driver v1.2
ppdev: user-space parallel port driver
Linux agpgart interface v0.100 (c) Dave Jones
agpgart: Detected SiS 650 chipset
agpgart: Maximum main memory to use for agp memory: 816M
agpgart: unable to determine aperture size.
agpgart: agp_backend_initialize() failed.
agpgart-sis: probe of 0000:00:00.0 failed with error -22
Serial: 8250/16550 driver $Revision: 1.90 $ 8 ports, IRQ sharing disabled
ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
PCI: Enabling device 0000:00:02.6 (0000 -> 0001)
Using anticipatory io scheduler
Floppy drive(s): fd0 is 1.44M
FDC 0 is a post-1991 82077
loop: loaded (max 8 devices)
sis900.c: v1.08.07 11/02/2003
eth0: Unknown PHY transceiver found at address 1.
eth0: Using transceiver found at address 1 as default
eth0: SiS 900 PCI Fast Ethernet at 0x2000, IRQ 19, 00:c0:9f:2f:9d:78.
PPP generic driver version 2.4.2
PPP Deflate Compression module registered
PPP BSD Compression module registered
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
SIS5513: IDE controller at PCI slot 0000:00:02.5
SIS5513: chipset revision 0
SIS5513: not 100% native mode: will probe irqs later
SIS5513: SiS 962/963 MuTIOL IDE UDMA133 controller
ide0: BM-DMA at 0x1000-0x1007, BIOS settings: hda:DMA, hdb:pio
ide1: BM-DMA at 0x1008-0x100f, BIOS settings: hdc:DMA, hdd:pio
hda: MATSHITADVD-RAM UJ-811, ATAPI CD/DVD-ROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
hdc: ST3120022A, ATA DISK drive
ide1 at 0x170-0x177,0x376 on irq 15
hdc: max request size: 1024KiB
hdc: 234441648 sectors (120034 MB) w/2048KiB Cache, CHS=16383/255/63,
UDMA(100)
/dev/ide/host0/bus1/target0/lun0: p1 p2 p3 p4
hda: ATAPI 24X DVD-ROM DVD-R-RAM CD-R/RW drive, 2048kB Cache, UDMA(33)
Uniform CD-ROM driver Revision: 3.20
st: Version 20040318, fixed bufsize 32768, s/g segs 256
osst :I: Tape driver with OnStream support version 0.99.1
osst :I: $Id: osst.c,v 1.70 2003/12/23 14:22:12 wriede Exp $
ieee1394: Initialized config rom entry `ip1394'
ohci1394: $Rev: 1203 $ Ben Collins <[email protected]>
PCI: Enabling device 0000:00:02.3 (0000 -> 0002)
ohci1394: fw-host0: Unexpected PCI resource length of 1000!
ohci1394: fw-host0: OHCI-1394 1.0 (PCI): IRQ=[17]
MMIO=[e4000000-e40007ff] Max Packet=[2048]
video1394: Installed video1394 module
ieee1394: raw1394: /dev/raw1394 device initialized
sbp2: $Rev: 1205 $ Ben Collins <[email protected]>
ip1394: $Rev: 1198 $ Ben Collins <[email protected]>
ip1394: eth1: IEEE-1394 IPv4 over 1394 Ethernet (fw-host0)
ieee1394: Loaded AMDTP driver
ieee1394: Loaded CMP driver
pd: pd version 1.05, major 45, cluster 64, nice 0
pda: Autoprobe failed
pd: no valid drive found
pcd: pcd version 1.07, major 46, nice 0
pcd0: Autoprobe failed
pcd: No CD-ROM drive found
pf: pf version 1.04, major 47, cluster 64, nice 0
pf: No ATAPI disk detected
pt: pt version 1.04, major 96
pt0: Autoprobe failed
pt: No ATAPI tape drive detected
pg: pg version 1.02, major 97
pga: Autoprobe failed
pg: No ATAPI device detected
PCI: Enabling device 0000:00:03.3 (0000 -> 0002)
ehci_hcd 0000:00:03.3: Silicon Integrated Systems [SiS] USB 2.0 Controller
ehci_hcd 0000:00:03.3: irq 23, pci mem f9831000
ehci_hcd 0000:00:03.3: new USB bus registered, assigned bus number 1
PCI: cache line size of 128 is not supported by device 0000:00:03.3
ehci_hcd 0000:00:03.3: USB 2.0 enabled, EHCI 1.00, driver 2003-Dec-29
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 6 ports detected
ohci_hcd: 2004 Feb 02 USB 1.1 'Open' Host Controller (OHCI) Driver (PCI)
ohci_hcd: block sizes: ed 64 td 64
ohci_hcd 0000:00:03.0: Silicon Integrated Systems [SiS] USB 1.0 Controller
ohci_hcd 0000:00:03.0: irq 20, pci mem f9833000
ohci_hcd 0000:00:03.0: new USB bus registered, assigned bus number 2
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 2 ports detected
ohci_hcd 0000:00:03.1: Silicon Integrated Systems [SiS] USB 1.0
Controller (#2)
ohci_hcd 0000:00:03.1: irq 21, pci mem f9835000
ohci_hcd 0000:00:03.1: new USB bus registered, assigned bus number 3
hub 3-0:1.0: USB hub found
hub 3-0:1.0: 2 ports detected
ohci_hcd 0000:00:03.2: Silicon Integrated Systems [SiS] USB 1.0
Controller (#3)
usb 1-3: new high speed USB device using address 2
ohci_hcd 0000:00:03.2: irq 22, pci mem f9837000
ohci_hcd 0000:00:03.2: new USB bus registered, assigned bus number 4
hub 4-0:1.0: USB hub found
hub 4-0:1.0: 2 ports detected
USB Universal Host Controller Interface driver v2.2
usbcore: registered new driver usblp
drivers/usb/class/usblp.c: v0.13: USB Printer Device Class driver
Initializing USB Mass Storage driver...
scsi0 : SCSI emulation for USB Mass Storage devices
ieee1394: Host added: ID:BUS[0-00:1023] GUID[00c09f000011b431]
usb 3-2: new low speed USB device using address 2
Vendor: Maxtor Model: OneTouch Rev: 0200
Type: Direct-Access ANSI SCSI revision: 02
SCSI device sda: 490232832 512-byte hdwr sectors (250999 MB)
sda: assuming drive cache: write through
/dev/scsi/host0/bus0/target0/lun0: p1
Attached scsi disk sda at scsi0, channel 0, id 0, lun 0
Attached scsi generic sg0 at scsi0, channel 0, id 0, lun 0, type 0
USB Mass Storage device found at 2
usbcore: registered new driver usb-storage
USB Mass Storage support registered.
usbcore: registered new driver hiddev
usbcore: registered new driver hid
drivers/usb/input/hid-core.c: v2.0:USB HID core driver
mice: PS/2 mouse device common for all mice
input: PC Speaker
drivers/usb/input/hid-core.c: ctrl urb status -32 received
i8042.c: Detected active multiplexing controller, rev 1.1.
serio: i8042 AUX0 port at 0x60,0x64 irq 12
Synaptics Touchpad, model: 1
Firmware: 5.8
Sensor: 29
new absolute packet format
Touchpad has extended capability bits
-> 4 multi-buttons, i.e. besides standard buttons
-> multifinger detection
-> palm detection
input: SynPS/2 Synaptics TouchPad on isa0060/serio1
serio: i8042 AUX1 port at 0x60,0x64 irq 12
serio: i8042 AUX2 port at 0x60,0x64 irq 12
serio: i8042 AUX3 port at 0x60,0x64 irq 12
serio: i8042 KBD port at 0x60,0x64 irq 1
input: USB HID v1.10 Keyboard [0566:3002] on usb-0000:00:03.1-2
input: AT Translated Set 2 keyboard on isa0060/serio0
I2O Core - (C) Copyright 1999 Red Hat Software
I2O: Event thread created as pid 168
i2o: Checking for PCI I2O controllers...
I2O configuration manager v 0.04.
(C) Copyright 1999 Red Hat Software
I2O Block Storage OSM v0.9
(c) Copyright 1999-2001 Red Hat Software.
i2o_block: Checking for Boot device...
i2o_block: Checking for I2O Block devices...
i2o_scsi.c: Version 0.1.2
chain_pool: 0 bytes @ f7ba377c
(512 byte buffers X 4 can_queue X 0 i2o controllers)
i2c /dev entries driver
i2c-sis96x version 1.0.0
drivers/usb/input/hid-core.c: ctrl urb status -32 received
drivers/usb/input/hid-core.c: ctrl urb status -32 received
drivers/usb/input/hid-core.c: ctrl urb status -32 received
sis96x smbus 0000:00:02.1: SiS96x SMBus base address: 0x8100
input,hiddev96: USB HID v1.10 Device [0566:3002] on usb-0000:00:03.1-2
Advanced Linux Sound Architecture Driver Version 1.0.4rc2 (Tue Mar 30
08:19:30 2004 UTC).
PCI: Enabling device 0000:00:02.7 (0000 -> 0001)
usb 4-2: new low speed USB device using address 2
input: USB HID v1.10 Mouse [B16_b_02 USB-PS/2 Optical Mouse] on
usb-0000:00:03.2-2
intel8x0_measure_ac97_clock: measured 49545 usecs
intel8x0: clocking to 48000
ALSA device list:
#0: SiS SI7012 at 0x1c00, irq 18
NET: Registered protocol family 2
IP: routing cache hash table of 8192 buckets, 64Kbytes
TCP: Hash tables configured (established 262144 bind 65536)
IPv4 over IPv4 tunneling driver
GRE over IPv4 tunneling driver
ip_conntrack version 2.1 (7168 buckets, 57344 max) - 296 bytes per conntrack
ip_tables: (C) 2000-2002 Netfilter core team
ipt_recent v0.3.1: Stephen Frost <[email protected]>.
http://snowman.net/projects/ipt_recent/
arp_tables: (C) 2002 David S. Miller
Initializing IPsec netlink socket
NET: Registered protocol family 1
NET: Registered protocol family 17
NET: Registered protocol family 15
ACPI: (supports S0 S3 S4 S5)
found reiserfs format "3.6" with standard journal
reiserfs: using ordered data mode
Reiserfs journal params: device hdc4, size 8192, journal first block 18,
max trans len 1024, max batch 900, max commit age 30, max trans age 30
reiserfs: checking transaction log (hdc4) for (hdc4)
Using r5 hash to sort names
VFS: Mounted root (reiserfs filesystem) readonly.
Mounted devfs on /dev
Freeing unused kernel memory: 212k freed
Adding 1004052k swap on /dev/hdc3. Priority:-1 extents:1
NTFS volume version 3.1.
ISO 9660 Extensions: Microsoft Joliet Level 1
ISOFS: changing to secondary root
nvidia: module license 'NVIDIA' taints kernel.
0: nvidia: loading NVIDIA Linux x86 NVIDIA Kernel Module 1.0-5336 Wed
Jan 14 18:29:26 PST 2004
0: NVRM: AGPGART: unable to retrieve symbol table
drivers/usb/input/hid-input.c: event field not found
drivers/usb/input/hid-input.c: event field not found
drivers/usb/input/hid-input.c: event field not found
drivers/usb/input/hid-input.c: event field not found
no device found
Unable to load NLS charset cp437
ISO 9660 Extensions: Microsoft Joliet Level 3
ISOFS: changing to secondary root
no device found
no device found
no device found
usb 1-3: USB disconnect, address 2
no device found
On Friday 18 June 2004 17:53, Thomas Latzelsberger wrote:
> Dear readers,
>
> As mentioned on http://teg.homeunix.org/sis900.html and
> http://www.latzinator.com/acer_aspire_1705SMi.html there is a problem
> with bandwidth for the SiS900 onboard NIC. I allways use vanilla kernels
> and I'm having had this problem from 2.4.22 to 2.4.24 and from 2.6.2 to
> 2.6.6.
> The symptom is easy to explain. I connect the PC to a 100MBit switch and
> no matter which method of transfer (ftp, scp, samba, nfs) I use, I get a
> maximum transfer rate of less than 400kB/s. By accident I found a dirty
> workaround that might be a hint for some tech savvy hackers: if I force
> the NIC to use halfduplex (allthough it's connected to a switch) it
> works like expected (7-8 MB/s).
>
> The only help I can be is that I can test new kernel drivers and send
> you feedback.
>
> Any help highly appreciated,
>
> Thomas Latzelsberger
Hi,
try the sis900-fix-phy-transceiver-detection.patch which you can find in -mm
patches. It works fine for me, as I had the same problem.
A few days ago, I asked why that patch wasn't moved to stable tree. Here you
can find the mail:
http://lkml.org/lkml/2004/6/16/182
greets dominik
On Fri, 18 Jun 2004, Thomas Latzelsberger wrote:
> Dear readers,
>
> As mentioned on http://teg.homeunix.org/sis900.html and
> http://www.latzinator.com/acer_aspire_1705SMi.html there is a problem
> with bandwidth for the SiS900 onboard NIC. I allways use vanilla kernels
> and I'm having had this problem from 2.4.22 to 2.4.24 and from 2.6.2 to
> 2.6.6.
Does it work correctly with older or newer kernels - like 2.6.1 or 2.6.7?
> The symptom is easy to explain. I connect the PC to a 100MBit switch and
> no matter which method of transfer (ftp, scp, samba, nfs) I use, I get a
> maximum transfer rate of less than 400kB/s. By accident I found a dirty
> workaround that might be a hint for some tech savvy hackers: if I force
> the NIC to use halfduplex (allthough it's connected to a switch) it
> works like expected (7-8 MB/s).
>
> The only help I can be is that I can test new kernel drivers and send
> you feedback.
>
> Any help highly appreciated,
>
Doesn't have to be kernel related. I've seen plenty of cases over the
years where certain combinations of network hardware have issues like
that.
Sometimes it's a case of the two devices not being able to properly do
auto-negotiating together (even if both claim to support it) - I've seen
several cases of that with older 3COM NIC's hooked up to IBM switches -
forcing the port speed and duplex to the same value at both ends instead of
relying on auto-negotiation usually fix that up.
Sometimes it's a case of some equipment adverticing full duplex and/or
100mb/sec capability without actually being able to handle the dataflow
at that speed or duplex - I've seen that with several Realtek 8139 based
NIC's - the solution there is then often to drop down to half duplex or
10mb/sec speed...
And I've seen a lot of other similar problems when combining equipment
from various vendors in certain combinations.. some NIC's, Switches,
Hub's, Bridges etc just don't like eachother (and some are just plain crap
and don't work as adverticed).
Could also be caused by faulty cabling or too long cables I guess.
Ofcourse it can also be a driver issue, but it certainly does not have to
be. If it works with other kernel versions then I'd say a driver bug is
more likely.
--
Jesper Juhl <[email protected]>