A Dilluns 26 Març 2007 18:15, Jan Kiszka va escriure: > Leopold Palomo-Avellaneda wrote: > > Hi, > > > > after follow the recomendations of Mr. Kiszka I have configured my system > > without tdma. > > > > Adding the other node in the net with rtroute solicit I have found that > > doing a rtping between a rtai+rtnet with a VxWorks box with a cross cable > > an unbelieved numbers: > > > > > > # ./rtping -s 1200 192.168.1.4 > > Real-time PING 192.168.1.4 1200(1228) bytes of data. > > 1208 bytes from 192.168.1.4: icmp_seq=1 time=0.0 us > > 1208 bytes from 192.168.1.4: icmp_seq=2 time=0.0 us > > > > > > this is possible? > > Nope, it's too good to be true.
Sure !!!!! > When using RTnet with RTAI, you have to > keep in mind that RTAI's system timer requires manual start-up, either > in your main application (rt_timer_start or so) or via one RTnet module > that needs it too (tdma.ko or rtcfg.ko - but you don't need any of them > for your scenario). Yes, ok I have load the rtcfng module. Now the numbers are a bit different. In a loopback mode I have this: # ./rtping -s 1200 192.168.1.3 Real-time PING 192.168.1.3 1200(1228) bytes of data. 1208 bytes from 127.0.0.1: icmp_seq=1 time=31.9 us 1208 bytes from 127.0.0.1: icmp_seq=2 time=22.7 us 1208 bytes from 127.0.0.1: icmp_seq=3 time=19.8 us 1208 bytes from 127.0.0.1: icmp_seq=4 time=19.3 us 1208 bytes from 127.0.0.1: icmp_seq=5 time=20.0 us --- 192.168.1.3 rtping statistics --- 5 packets transmitted, 5 received, 0% packet loss worst case rtt = 31.9 us and with the VxWorks box: ulises:/usr/local/rtnet/sbin# ./rtping -s 1200 192.168.1.4 Real-time PING 192.168.1.4 1200(1228) bytes of data. 1208 bytes from 192.168.1.4: icmp_seq=1 time=1509.9 us 1208 bytes from 192.168.1.4: icmp_seq=2 time=690.3 us 1208 bytes from 192.168.1.4: icmp_seq=3 time=672.3 us 1208 bytes from 192.168.1.4: icmp_seq=4 time=665.4 us 1208 bytes from 192.168.1.4: icmp_seq=5 time=666.8 us 1208 bytes from 192.168.1.4: icmp_seq=6 time=672.9 us 1208 bytes from 192.168.1.4: icmp_seq=7 time=680.8 us 1208 bytes from 192.168.1.4: icmp_seq=8 time=661.2 us 1208 bytes from 192.168.1.4: icmp_seq=9 time=674.0 us --- 192.168.1.4 rtping statistics --- 9 packets transmitted, 9 received, 0% packet loss worst case rtt = 1509.9 us it's curious because the number are not very different from a normal net. Also, I have a peak of ~1ms every 16 iteration .. Could I have a better numbers or are so good? Regards, Leo Pd looking on the dmesg I found this message, it's important? RTnet: initialising real-time networking PCI: Found IRQ 11 for device 0000:00:0e.0 rteth0: 0000:00:0e.0, 00:A0:C9:1D:52:B9, IRQ 11. *** Receiver lock-up bug detected *** Your device may not work reliably! RTnet: registered rteth0 initializing loopback... Leo ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ RTnet-users mailing list RTnet-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/rtnet-users
