My PC uses an Intel motherboard running at 1.5Ghz and 256mb of ram doesn't like EMC2 apparently because of excessive overruns. Looking at http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?TroubleShooting it tells me to look for: ubuntu:$ ls -l /dev/rt* lrwxrwxrwx 1 root root 8 2006-05-23 23:34 /dev/rtai_shm -> RTAI_SHM crw-rw---- 1 root audio 10, 135 2006-05-14 16:12 /dev/rtc
When I do I get: [EMAIL PROTECTED]:~$ ls -l /dev/rt* crw-rw---- 1 root audio 10, 135 2007-03-12 19:03 /dev/rtc crw-r--r-- 1 root root 150, 3 2007-03-13 08:13 /dev/rtf3 [EMAIL PROTECTED]:~$ and it says I should see this: fedora]$ ls -l /dev/rt* crw-rw-rw- 1 root root 10, 254 Jul 18 2005 /dev/rtai_shm crw-r--r-- 1 root root 10, 135 Jun 4 16:21 /dev/rtc crw-rw-rw- 1 root root 150, 0 Jul 18 2005 /dev/rtf0 crw-rw-rw- 1 root root 150, 1 Jul 18 2005 /dev/rtf1 crw-rw-rw- 1 root root 150, 2 Jul 18 2005 /dev/rtf2 crw-rw-rw- 1 root root 150, 3 Jul 18 2005 /dev/rtf3 crw-rw-rw- 1 root root 150, 4 Jul 18 2005 /dev/rtf4 crw-rw-rw- 1 root root 150, 5 Jul 18 2005 /dev/rtf5 crw-rw-rw- 1 root root 150, 6 Jul 18 2005 /dev/rtf6 crw-rw-rw- 1 root root 150, 7 Jul 18 2005 /dev/rtf7 crw-rw-rw- 1 root root 150, 8 Jul 18 2005 /dev/rtf8 crw-rw-rw- 1 root root 150, 9 Jul 18 2005 /dev/rtf9 If these files do not exist, you can create them, for example: sudo mknod /dev/RTAI_SHM c 10, 254; So I did: [EMAIL PROTECTED]:~$ sudo mknod /dev/RTAI_SHM c 10, 254; Password: [EMAIL PROTECTED]:~$ ls -l /dev/rt* crw-rw---- 1 root audio 10, 135 2007-03-12 19:03 /dev/rtc crw-r--r-- 1 root root 150, 3 2007-03-13 08:13 /dev/rtf3 [EMAIL PROTECTED]:~$ ls -l /dev/RTAI_SHM crw-r--r-- 1 root root 10, 254 2007-03-13 14:39 /dev/RTAI_SHM [EMAIL PROTECTED]:~$ So the other files rtf0 - rtf2, and rtf4 through 9 are still missing. When I run the latency test I get: ## RTAI latency calibration tool ## # period = 100000 (ns) # avrgtime = 1 (s) # do not use the FPU # start the timer # timer_mode is oneshot RTAI Testsuite - KERNEL latency (all data in nanoseconds) RTH| lat min| ovl min| lat avg| lat max| ovl max| overruns RTD| -938| -938| -131| 7823| 7823| 0 RTD| -997| -997| -123| 6605| 7823| 0 RTD| -930| -997| -145| 6552| 7823| 0 <Snip RTD| -982| -1005| -116| 7708| 206073| 5 RTD| -990| -1005| -122| 7561| 206073| 5 RTH| lat min| ovl min| lat avg| lat max| ovl max| overruns RTD| -982| -1005| -120| 7628| 206073| 5 RTD| -1005| -1005| -111| 9621| 206073| 5 RTD| -975| -1005| -16| 10413| 206073| 5 with an overrun occuring approximately every 62 secs or so. So I goto http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?FixingDapperSMIIssues and they explain that I need to replace /usr/realtime-2.6.15-magma/modules/rtai_smi.ko with the downloaded rtai_smi.ko they offer. (Alternative: grab the binary (for Ubuntu 6.06-Dapper Drake only) from [[here]]). So to be sure that I don't lose the current file I do: sudo cp /usr/realtime-2.6.15-magma/modules/rtai_smi.ko /usr/realtime-2.6.15-magma/modules/rtai_smi1.ko and then: sudo cp /home/jack/Downloads/rtai_smi.ko /usr/realtime-2.6.15-magma/modules/rtai_smi.ko Then I run the latency test and find that nothing has changed. So I then put the original file back. So now I am at a loss as to what my next step should be. Any ideas short of looking for a different motherboard? Jack Ensor ------------------------------------------------------------------------- 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 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
