[etherlab-users] EtherCAT Master used from user mode

[Andre Puschmann]

Hi Andy, hi Martin,

martin troxler wrote:
> The jitter was less than 50µs and the time used by the master was less
> than 3µs.
>
> We detected that the jitter depends highly on the PC hardware (AND the
> linux kernel version, esp. graphics board drivers) and is not really
> affected by the master.
>   
True, the master computation time is quite low compared to the 
send/receive overhead for the packets (as Florian also reported in the 
manual).
But I am not aware of any detailed measurements out there. Thats why 
your results might be useful for others, too.

With "PC hardware" do you mean CPU/chipset or network card?
What about the graphics board? That sounds like an interesting thing ..


Best regards,
Andre