Hi,

what's the highest speed a character device can run at ?

I've tested the speed of my driver with a self written test program an I get
as highest speed about 380KB/sec.

My driver copies it's data in blocks of 256KB via the uiomove function to
the calling process. Is this the limit of speed I can reach ?

Here's the part of the read function of the driver:

  case(OUTPUT_AS_SND):
    {
      // has to be removed from the real driver !
      sc->snd_buffersize = SNDBUFFERSIZE;
      spdif_to_16bit_signed(sc);
      uiomove(sc->snd_buffer, sc->snd_buffersize, uio);
      break;
    }

spdif_to_16bit_signed is ATM an empty function.

My hardware is ARM710/40MHz.

Any ideas how I can speed up things a little bit, because 380KB/sec is a
little bit to near by the speed of a spdif-stream.



Ciao, Peter

/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
|                                                                          |
|                            >>> FutureGroove <<<                          |
|                                                                          |
| Peter Berg                                       Music production &      |
|                                                  softwaredevelopment     |
| w3: http://www.ww.tu-freiberg.de/~pberg                                  |
| email: Peter.Berg@ww.tu-freiberg.de                                      |
|                                           part time system administrator |
|                                                   at *.ww.tu-freiberg.de |
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/