Dear Eli, in message <75DF04AC5ED4D511A9810090273CB4163A6726 at ROKONET-E> you wrote: > > The initial tests where done witout all the parsing and TCP overhead. We > just replied imidiatly to packets addressed to us, and we got 5-8mSec delay > from the last char we received and the first char we send. Now (HZ=1000) > it's 2mSec with the parsing and TCP/IP. > > Can we leave the HZ to 1000 ?
We cannot answer this question. You know, there is no guarantee in the standard Linux kernel that you will always meet your deadlines. If an occasional miss is acceptable to you, and the system works as is, then yes, you can leave it as is. If you need guaranteed deadlines you are in another class of problems; you will have to use something like RTAI then. Or maybe at least the preemptible/low latency patches. Best regards, Wolfgang Denk -- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de "There is nothing so deadly as not to hold up to people the opportunity to do great and wonderful things, if we wish to stimulate them in an active way." - Dr. Harold Urey, Nobel Laureate in chemistry ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
