oh -oh something else messed up now. Thought I would run the latency test again before I did what you suggested and look what happened.
[EMAIL PROTECTED]:/$ sudo mkdir /dev/rtf; sudo mknod /dev/rtf/3 c 150 3; [EMAIL PROTECTED]:/$ sudo mknod /devrtf3 c 150 3; [EMAIL PROTECTED]:/$ cd /usr/realtime*/testsuite/kern/latency [EMAIL PROTECTED]:/usr/realtime-2.6.15-magma/testsuite/kern/latency$ ./run * * * Type ^C to stop this application. * * ## RTAI latency calibration tool ## # period = 100000 (ns) # avrgtime = 1 (s) # do not use the FPU # start the timer # timer_mode is oneshot Error opening /dev/rtf3 [EMAIL PROTECTED]:/usr/realtime-2.6.15-magma/testsuite/kern/latency$ I'll take a look for rtf3 [EMAIL PROTECTED]:/dev$ ls -l r* brw-rw---- 1 root disk 1, 0 2007-03-14 15:26 ram0 brw-rw---- 1 root disk 1, 1 2007-03-14 15:26 ram1 brw-rw---- 1 root disk 1, 10 2007-03-14 15:26 ram10 brw-rw---- 1 root disk 1, 11 2007-03-14 15:26 ram11 brw-rw---- 1 root disk 1, 12 2007-03-14 15:26 ram12 brw-rw---- 1 root disk 1, 13 2007-03-14 15:26 ram13 brw-rw---- 1 root disk 1, 14 2007-03-14 15:26 ram14 brw-rw---- 1 root disk 1, 15 2007-03-14 15:26 ram15 brw-rw---- 1 root disk 1, 2 2007-03-14 15:26 ram2 brw-rw---- 1 root disk 1, 3 2007-03-14 15:26 ram3 brw-rw---- 1 root disk 1, 4 2007-03-14 15:26 ram4 brw-rw---- 1 root disk 1, 5 2007-03-14 15:26 ram5 brw-rw---- 1 root disk 1, 6 2007-03-14 15:26 ram6 brw-rw---- 1 root disk 1, 7 2007-03-14 15:26 ram7 brw-rw---- 1 root disk 1, 8 2007-03-14 15:26 ram8 brw-rw---- 1 root disk 1, 9 2007-03-14 15:26 ram9 crw-rw-rw- 1 root root 1, 8 2007-03-14 15:26 random crw-rw---- 1 root audio 10, 135 2007-03-14 15:27 rtc rtf: total 0 crw-r--r-- 1 root root 150, 3 2007-03-14 15:46 3 [EMAIL PROTECTED]:/dev$ Aha - not there - no wonder it didn't work Latency test doesn't work What do I do now? Jack Ensor Quoting Alex Joni <[EMAIL PROTECTED]>: > Hi Jack, > > you were pretty close :) > > You need to load the modified module (sudo modprobe rtai_smi) > and then run the latency test again. > If that works you will need to change the /etc/emc2/rtapi.conf and add > rtai_smi to the list of modules to load for RTAI3 (in the line with > adeos, rtai_* & co) > > Regards, > Alex > > On Tue, 2007-03-13 at 15:49 -0400, Jack Ensor wrote: > > 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. 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