JeffLowe Posted February 2, 2022 Share Posted February 2, 2022 For many years now we have been operating our 460 UMAC with Phase/Servo/RTI at 16/8/4 KHz with near flawless operation. Admittedly, on some certain complex part programs the 460 will throw an insufficient calculation time error. Since implementing the Quad core, the same settings have worked well and have eliminated all instances of insufficient calculation time errors. However in trying to increase performance I have increased the clocks to 32/16/8, but I now get a burst of errors on startup. These can be cleared and the system almost works, however opening the IDE (4.5.2.9) the machine crashes hard with Phase/Servo/RTI errors. Looking at task manager does not show any undue CPU utilization (I am running "Balanced"). Dropping down to 24/12/6 does not resolve this. It seems that the communications tasks are preempting the real time tasks and I do not understand this. I do note the ps -a command shows a bunch of gpascii sessions. Also, when opening or closing the apps within the IDE (Tuning/Plot/Watch) generates bursts of errors. Is there anything I can do to make the hard real time tasks more robust so that they are not preempted by the IDE? (FW is 2.6.0.,1) Quote Link to comment Share on other sites More sharing options...
Eric Hotchkiss Posted February 11, 2022 Share Posted February 11, 2022 If you clear Sys.MinPhaseTime and Sys.MaxServoTime by setting them equal to zero, what value do they reach after letting the IDE run and after reconnecting? Quote Link to comment Share on other sites More sharing options...
JeffLowe Posted February 14, 2022 Author Share Posted February 14, 2022 Test configuration: 24/12/6. (41.6 usec, 83.3 usec and 166.6 usec ) After resetting Sys.MinPhaseTime=0 and MaxServoTime=0 the immediatly revert to 7.6 and 37.96 respectivly. Opening and closing the Task Manager, the Sys.MinPhaseTime remains at 7.6 and the MaxServoTime Jumps to 107.24 which increases ServoErrorCtr to 33 and bymps RTIntrErrorCtr up to 2. Note there are 13 gpascii tasks. Closing and reopening the IDE MaxServoTime jumps to 151.12. At this point there are now 14 gpascii sessions along with now two instances of geterrors. Quote Link to comment Share on other sites More sharing options...
Alex Anikstein Posted February 18, 2022 Share Posted February 18, 2022 Our developers are aware of this issue and looking for possible solutions. We've passed your results on to them in case it offers any additional insight. We have a few different ideas for how to internally solve it, though I am not sure what the time table is as none of the "fixes" are particularly quick. It's not an ideal workaround, but for now, we would generally recommend not opening/closing the IDE or many tools while the PMAC is actually running, but rather, trying to open any windows beforehand. Quote Link to comment Share on other sites More sharing options...
JeffLowe Posted March 15, 2022 Author Share Posted March 15, 2022 I am checking progress on this issue. Our application code also uses SSH and as such also will cause these errors. I have mostly stuck with defining the problem in terms of the IDE preempting servo and phase and generating errors that way, but the issue is larger than that. I would like to suggest that one approach might be to have a two tiered communications protocol so that normal communication (watch/position/unsolicited messages and so on would take place on a low priority basis on a separate port. In any case, this bug is important to us to have some sort of fix. Quote Link to comment Share on other sites More sharing options...
Alex Anikstein Posted April 22, 2022 Share Posted April 22, 2022 As of now, it is still being worked on. We have a method we are exploring fairly strongly, but because it changes some parts of communication, we want to carefully consider the options and implications before we implement it. Honestly, that's not a bad idea. I'm not sure if it's feasible or what it would take to implement, but I will pass it along anyways. I still don't really have a timetable to present for when this will be resolved, but we do hear it clearly and it is receiving an appropriate focus from our developers. Quote Link to comment Share on other sites More sharing options...
jnasri Posted August 22, 2022 Share Posted August 22, 2022 Hello, We are facing the same sort of problem from our side as well. Do you have an update or a fix that can be deployed? best regards 1 Quote Link to comment Share on other sites More sharing options...
sutty Posted December 20, 2022 Share Posted December 20, 2022 (edited) Any news on this topic? This issue accompanies me since 2018 with PPMAC V2.2.0.37, IDE V3.0.1.0 (see here) Edited December 20, 2022 by sutty 2 Quote Link to comment Share on other sites More sharing options...
leandro.martins Posted February 24, 2023 Share Posted February 24, 2023 We are also investigating some problems that could have relation with the gpascii. Is there any update about this issue? For the ARM PPMAC, I was considering to check if changing the Sys.CoreGpascii have some effect. Anyone had experience with that register? Quote Link to comment Share on other sites More sharing options...
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