Jan Kiszka schrieb an Philipp Gontermann <date=Mon, Apr 03, 2006 at 02:54:36PM +0200> > Philipp Gontermann wrote: > > Hi, > > > > we wanted to use rtnet for some hard real-time application, > > but we are not shure if it will meet our requirements. > > So here is the scenario: > > - 2 Computer, directly connected via 100Mbit > > - first one sends one package of at most 100Bytes > > - second computer takes this data and does some computation > > (approx. 300us) and sends back 1000Bytes > > - then first one again sends data .... > > > > We need the responce data is available at the first > > computer after at most 800us. It is necessary that NO cycle > > should take make than this time. > > Is it possible to meet these requirements with rtnet? > > What ist the minimal roundtrip time which can be reached? > > That's hardware-dependent. With typical mid-range desktops or high-end > embedded industry PCs (I assume you use x86?) you can go below 1 ms > cycles, and you will still have time for "real" work. One side is x86 (1.73Ghz, the other one is a embedded system with PowerPC 405 (250Mhz) > Moreover, if you > have a fixed traffic schedule like this one and you can waive non-rt > packet tunnelling, you can skip RTmac/TDMA and gain further resources. Yes, we have fixed schedule. How much time can we save (approx.) by skipping RTmac/TDMA. Can you tell anything about the minimal time between receiving data and sending some other.
Philipp. -- IMTEK LS Sensoren Albert-Ludwigs-Universitaet Freiburg Dipl.-Inform. Philipp Gontermann Georges-Koehler-Allee 78 00-021 D-79110 Freiburg ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 _______________________________________________ RTnet-users mailing list RTnet-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/rtnet-users
