[RTnet-users] Round trip test

[Mica H. <Mica.Hallin@Kontron.be>]

Hi, I try to do some basic performance test of RTnet

What correspond exactly TDMA_CYCLE and TDMA_OFFSET ?

here is a test with TDMA_CYCLE=500 and TDMA_OFFSET="50"

ip address 192.168.10.3=c0a80a03

Warniinterval = 500
ng: loading rt_cpacketsize = 58
Roundtrip = 504us (min: 504us, max: 504us)
Roundtrip = 23902us (min: 504us, max: 23902us)
Roundtrip = 502us (min: 502us, max: 23902us)
Roundtrip = 24100us (min: 502us, max: 24100us)
Roundtrip = 500us (min: 500us, max: 24100us)
Roundtrip = 500us (min: 500us, max: 24100us)
Roundtrip = 24099us (min: 500us, max: 24100us)
Roundtrip = 498us (min: 498us, max: 24100us)
Roundtrip = 26097us (min: 498us, max: 26097us)
Roundtrip = 496us (min: 496us, max: 26097us)
Roundtrip = 26097us (min: 496us, max: 26097us)
Roundtrip = 497us (min: 496us, max: 26097us)

it's no real-time

When a try whit default setting

the round trip is = 7000µs but it lost 1µs evry seccond.

when I launch rtai the one calibration is not correct :

***** STARTING THE UP REAL TIME SCHEDULER WITH LINUX *****
***** FP SUPPORT AND READY FOR A PERIODIC TIMER *****
***<> LINUX TICK AT 100 (HZ) <>***
***<> CALIBRATED CPU FREQUENCY 33000000 (HZ) <>***
***<> CALIBRATED TIMER-INTERRUPT-TO-SCHEDULER LATENCY 2515 (ns) <>***
***<> CALIBRATED ONE SHOT SETUP TIME 485 (ns) <>***
***<> COMPILER: gcc version 2.95.3 20010319 (2.95.4 CVS +
prerelease/franzo/2001
0912)***

for a PowerPC 133 Mhz should this modify my RTnet test ?

Thanks a lot !!

Mica

PS : Jan I will capture communication between Litle Endian and big Endian
soon...