[U-Boot-Users] very slow netconsole

[U-Boot-Users] very slow netconsole

[Antonello Lombardinilo]

I have u-boot 1.1.6 running on my board based on IXP425
processor (266MhZ). 

I trying to use netconsole.
I readed doc/README.NetConsole and make connection with u-boot.
On u-boot I do:
   setenv nc 'setenv stdout nc;setenv stdin nc'
   setenv ncip 192.168.1.5:1234
   saveenv
   run nc
On host PC (192.168.1.5) I run following script:
   nc -u -l 1234 < /dev/null &
   nc -u 192.168.1.88 1234 

Note that in first host command I omitted "-p" flag before port definition.
The problem is the communication in vary slow: one character per second! 

Any suggestion ?

[U-Boot-Users] very slow netconsole

[Wolfgang Denk]

In message <20080320103051.11522.qmail@kasko.it> you wrote:
> I have u-boot 1.1.6 running on my board based on IXP425
> processor (266MhZ). 
...
> Any suggestion ?

Try current code? 1.3.2?

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Tactical? TACTICAL!?!? Hey, buddy, we went from kilotons to  megatons
several  minutes  ago.  We don't need no stinkin' tactical nukes. (By
the way, do you have change for 10 million people?)           - lwall

[U-Boot-Users] very slow netconsole

[Antonello Lombardinilo]

I just now:
 - switched to Intel IXDPG425 board (to have a "standard" board reference);
 - downloaded and compiled u-Boot 1.3.2 with NetConsole support; 

Even in this scenario the communication is slow ! 

Best Regards,
Antonello Lombardinilo 

Wolfgang Denk writes: 

> In message <20080320103051.11522.qmail@kasko.it> you wrote:
>> I have u-boot 1.1.6 running on my board based on IXP425
>> processor (266MhZ). 
> ...
>> Any suggestion ?
> 
> Try current code? 1.3.2? 
> 
> Best regards, 
> 
> Wolfgang Denk 
> 
> -- 
> DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
> Tactical? TACTICAL!?!? Hey, buddy, we went from kilotons to  megatons
> several  minutes  ago.  We don't need no stinkin' tactical nukes. (By
> the way, do you have change for 10 million people?)           - lwall

[U-Boot-Users] very slow netconsole

[Stefano Babic]

Antonello Lombardinilo wrote:
> I just now:
>  - switched to Intel IXDPG425 board (to have a "standard" board reference);
>  - downloaded and compiled u-Boot 1.3.2 with NetConsole support; 
> 
> Even in this scenario the communication is slow ! 

Take a look at your ethernet driver (I think cpu/ixp/npe.c). The
eth_halt and eth_init functions are called before each transfer, even
for single character.

In npe_halt:

        debug("%s\n", __FUNCTION__);

        /* Delay to give time for recovery of mbufs */
        for (i = 0; i < 100; i++) {
                npe_poll(p_npe->eth_id);
                udelay(100);
        }

The delay seems strictly correlated to the slowness you report. Check
the npe_init function, too. If the ethernet is reinitialized after each
transfer, the result is a very slow connection.

Best regards,
Stefano Babic

-- 
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80  Email: office at denx.de
=====================================================================