[driverloader] slow operation of 3-com 3crwe254g72

Linuxant support (Jonathan) support at linuxant.com
Mon Dec 6 16:35:51 EST 2004


the speed you have under Linux can be slower than the one you can get 
under Windows. If your 'dmesg' is filled with error messages generated 
by DriverLoader, it can explains why you get between 25% to 33% of the 
speed you have under Windows.

Please generate and send at support at linuxant.com a 'dumpdiag' that you 
can generate with the 'dldrconfig --dumpdiag' command in a root shell. 
You should generate a dump just after a large file transfer, so we could 
see the error messages you obtain in your 'dmesg'. The file generated 
will be located in the '/tmp' directory and this is the only information 
we need.


Technical specialist / Linuxant
support at linuxant.com

Darin Nelson wrote:
> Hi:
>     I've just installed DriverLoader 2.10 under a 2.6.9 kernel to 
> support a 3-com 3crwe254g72 USB wireless interface. The wrapped driver 
> is 3Com's latest -- The installation went smoothly, the device 
> works (and thanks & a license fee are due to Linuxant for the great 
> product), but the link is rather slow.
>     iwconfig says:
>     54 Mb/s
>     Link Quality=94/94  Signal level=-31 dBm  Noise level=-154 dBm
>     However, no transfer seems to get above about 5Mb/sec under Linux.
>     Booting into WinXP, I can get 15-20 Mb/sec using the same hardware 
> and 3Com driver.
>     Perhaps related to the slowdown is that a significant number of 
> Invalid misc errors are logged -- a few hundred a second during a large 
> file transfer, for example. None of the documentation I can find tells 
> me what specific problem this might point to.
>     I've tried prodding a few of the iwconfig parameters, but nothing 
> seems to have any effect--either to slow or speed things up. Even the 
> rate parameter appears to be ignored; I get "54 Mb/s" no matter what I 
> try to set it to.
>     Any advice?
> Thanks,
> Darin
> _______________________________________________
> driverloader mailing list
> driverloader at lists.linuxant.com
> https://www.linuxant.com/mailman/listinfo/driverloader

More information about the driverloader mailing list