3c59x very slow with 2.6.X

3c59x very slow with 2.6.X

[Bernd Schubert]

Hello,

somehow the network speed is reduced to 14MBit with 2.6.X on my system, with 
2.4.X it has full 100MBit.
As all our systems boot diskless this is really annoying and I will reboot 
2.4.27 soon.

euklid:~# nttcp -T hamilton2
     Bytes  Real s   CPU s Real-MBit/s  CPU-MBit/s   Calls  Real-C/s   CPU-C/s
l  8388608    4.73    4.60     14.2004     14.5911    2048    433.36     445.3
1  8388608    4.73    0.03     14.1984   2236.9621    6145   1300.12  204833.3


from dmesg:

3c59x: Donald Becker and others. www.scyld.com/network/vortex.html
0000:00:0a.0: 3Com PCI 3c905B Cyclone 100baseTx at 0xb800. Vers LK1.1.19


euklid:~# mii-tool 
eth0: 100 Mbit, full duplex, link ok


Any ideas whats going on?



Please tell me if you need further information.

Cheers,
	Bernd


PS: Happens with 2.6.7 and 2.6.8-rc2-mm2

-- 
Bernd Schubert
Physikalisch Chemisches Institut / Theoretische Chemie
Universität Heidelberg
INF 229
69120 Heidelberg
e-mail: bernd.schubert@pci.uni-heidelberg.de

Re: 3c59x very slow with 2.6.X

[Frank Steiner]

Bernd Schubert wrote:
> Hello,
> 
> somehow the network speed is reduced to 14MBit with 2.6.X on my system, with 
> 2.4.X it has full 100MBit.
> As all our systems boot diskless this is really annoying and I will reboot 
> 2.4.27 soon.
> 
> euklid:~# nttcp -T hamilton2
>      Bytes  Real s   CPU s Real-MBit/s  CPU-MBit/s   Calls  Real-C/s   CPU-C/s
> l  8388608    4.73    4.60     14.2004     14.5911    2048    433.36     445.3
> 1  8388608    4.73    0.03     14.1984   2236.9621    6145   1300.12  204833.3


No problem here: both machines have a 3com 3c905CX-TX and run kernel 2.6.7.

zassenhaus /root# nttcp -T riemann
      Bytes  Real s   CPU s Real-MBit/s  CPU-MBit/s   Calls  Real-C/s   CPU-C/s
l  8388608    0.71    0.01     94.9903   7457.3690    2048   2898.87  227580.8
1  8388608    0.71    0.04     93.9984   1598.0964    5794   8115.57  137975.4

The driver is compiled into the kernel, not as module. Could that make a
difference for you?

cu,
Frank

-- 
Dipl.-Inform. Frank Steiner   Web:  http://www.bio.ifi.lmu.de/~steiner/
Lehrstuhl f. Bioinformatik    Mail: http://www.bio.ifi.lmu.de/~steiner/m/
LMU, Amalienstr. 17           Phone: +49 89 2180-4049
80333 Muenchen, Germany       Fax:   +49 89 2180-99-4049
* Rekursion kann man erst verstehen, wenn man Rekursion verstanden hat. *

Re: 3c59x very slow with 2.6.X

[Måns Rullgård]

Frank Steiner <fsteiner-mail@bio.ifi.lmu.de> writes:

> Bernd Schubert wrote:
>> Hello,
>> somehow the network speed is reduced to 14MBit with 2.6.X on my
>> system, with 2.4.X it has full 100MBit.
>> As all our systems boot diskless this is really annoying and I will
>> reboot 2.4.27 soon.
>> euklid:~# nttcp -T hamilton2
>>      Bytes  Real s   CPU s Real-MBit/s  CPU-MBit/s   Calls  Real-C/s   CPU-C/s
>> l  8388608    4.73    4.60     14.2004     14.5911    2048    433.36     445.3
>> 1  8388608    4.73    0.03     14.1984   2236.9621    6145   1300.12  204833.3
>
> No problem here: both machines have a 3com 3c905CX-TX and run kernel 2.6.7.
>
> zassenhaus /root# nttcp -T riemann
>       Bytes  Real s   CPU s Real-MBit/s  CPU-MBit/s   Calls  Real-C/s   CPU-C/s
> l  8388608    0.71    0.01     94.9903   7457.3690    2048   2898.87  227580.8
> 1  8388608    0.71    0.04     93.9984   1598.0964    5794   8115.57  137975.4
>
> The driver is compiled into the kernel, not as module. Could that make a
> difference for you?

FWIW, I'm using a 3c905C-TX with kernel 2.6.6 and 3c59x as a module,
without any problems at all.

-- 
Måns Rullgård
mru@kth.se

Re: 3c59x very slow with 2.6.X

[Bernd Schubert]

On Thursday 05 August 2004 08:00, you wrote:
> Bernd Schubert wrote:
> > Hello,
> >
> > somehow the network speed is reduced to 14MBit with 2.6.X on my system,
> > with 2.4.X it has full 100MBit.
> > As all our systems boot diskless this is really annoying and I will
> > reboot 2.4.27 soon.
> >
> > euklid:~# nttcp -T hamilton2
> >      Bytes  Real s   CPU s Real-MBit/s  CPU-MBit/s   Calls  Real-C/s  
> > CPU-C/s l  8388608    4.73    4.60     14.2004     14.5911    2048   
> > 433.36     445.3 1  8388608    4.73    0.03     14.1984   2236.9621   
> > 6145   1300.12  204833.3
>
> No problem here: both machines have a 3com 3c905CX-TX and run kernel 2.6.7.
>
> zassenhaus /root# nttcp -T riemann
>       Bytes  Real s   CPU s Real-MBit/s  CPU-MBit/s   Calls  Real-C/s  
> CPU-C/s l  8388608    0.71    0.01     94.9903   7457.3690    2048  
> 2898.87  227580.8 1  8388608    0.71    0.04     93.9984   1598.0964   
> 5794   8115.57  137975.4
>
> The driver is compiled into the kernel, not as module. Could that make a
> difference for you?

Its also compiled into the kernel on our systems. Here are the numbers with 
2.4.27-rc5:

euklid:~# nttcp -T hamilton2

     Bytes  Real s   CPU s Real-MBit/s  CPU-MBit/s   Calls  Real-C/s   CPU-C/s
l  8388608    0.71    0.04     94.9401   1677.7216    2048   2897.34   51200.0
1  8388608    0.71    0.03     94.1146   2236.9621    5797   8129.81  193233.3

Cheers,
	Bernd