Hi Lars, I walked a bit trough the code and tried some things out. There is already cleanup code to avoid this problem, but the cleanup works only when emc is started as root. It seems just like a problem with permissions. I recommend to start emc as root to avoid the problems.
In case of problems it's also possible to remove the shm by hand with these commands: ipcrm -M 0x48414c32 #(hal shm) ipcrm -M 0x0000cafe #(shm interface) Can you please tell me more about the segfaulting shm_tester? I have no problems with this program here... Thanks! regards Michael "Lars Segerlund" <lars.segerl...@gmail.com> schrieb: > I am seing the same thing, after running emc & your shm_tester a > couple of times, ipcs gets some cruft, and I can not start emc again > ... shm_tester segfaults .... > > Trying to investigate .... > > / regards Lars Segerlund > > 2011/6/18 Michael Abel <michael.a...@isw.uni-stuttgart.de>: >> >> Hello Guys, >> >> I probably found the problem, why you sometimes have to call halcmd as >> root to get emc started again. But I don't have a bugfix up to now. >> >> It seems like the complete hal shared memory is not given back to the os >> when emc is closed and my shm_tester is still running. For that reason you >> can still access the memory when emc has quit. When halcmd is started >> from the root account, the memory is also still there, but its possible >> to start emc again. >> >> This is printed after emc has quit: >> >> $ halcmd -V status >> HAL: initializing component 'halcmd26165' >> HAL: component 'halcmd26165' initialized, ID = 26165 >> HAL locking status: >> current lock value 0 (00) >> HAL_LOCK_NONE - nothing is locked >> HAL memory status >> used/total shared memory: 48238/262000 >> active/recycled components: 1/12 >> active/recycled pins: 0/417 >> active/recycled parameters: 0/65 >> active/recycled aliases: 0/0 >> active/recycled signals: 36/0 >> active/recycled functions: 0/17 >> active/recycled threads: 1/0 >> HAL: removing component 26165 >> HAL: component 26165 removed, name = 'halcmd26165' >> >> >> One can also see that there is shared memory left with ipcs: >> >> ipcs -m -p | grep <old_pid_of_rtapi_app> >> >> Does somebody know, how the rtai version of emc is handling hal shared >> memory? Is it still there after closing emc? >> >> Greetings, >> Michael >> >> >> >> >> ------------------------------------------------------------------------------ >> EditLive Enterprise is the world's most technically advanced content >> authoring tool. Experience the power of Track Changes, Inline Image >> Editing and ensure content is compliant with Accessibility Checking. >> http://p.sf.net/sfu/ephox-dev2dev >> _______________________________________________ >> Emc-developers mailing list >> Emc-developers@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-developers >> > > ------------------------------------------------------------------------------ > EditLive Enterprise is the world's most technically advanced content > authoring tool. Experience the power of Track Changes, Inline Image > Editing and ensure content is compliant with Accessibility Checking. > http://p.sf.net/sfu/ephox-dev2dev > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers > ------------------------------------------------------------------------------ EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
