#linuxcnc-devel Logs

Feb 29 2020

#linuxcnc-devel Calendar

10:06 AM jepler: andypugh it's a new failure? Weird. -lm (link with math library) should be later on the command line
10:22 AM jepler: this failure means that rate-monotonic scheduling was violated: http://buildbot.linuxcnc.org/buildbot/builders/1640.rip-buster-rtpreempt-amd64/builds/71/steps/runtests/logs/stdio
10:22 AM jepler: weird, I thought that worked :(
10:26 AM jepler: perhaps dgarr already fixed it -- http://buildbot.linuxcnc.org/buildbot/builders/1301.rip-precise-rtai-i386/builds/5673
10:30 AM jepler: I think rate monotonic scheduling has always been wrong on uspace/non-realtime. It was intended that all threads share a mutex, so that only one was ever running at a time. However, each thread has its own mutex, so it actually does nothing but waste some CPU. Silly me.
10:32 AM jepler: worse than that, the failure's actually on a RT system
06:51 PM skunkworks: latency might be slightly better running off an ssd.. (for base thread applications)
06:57 PM skunkworks: http://electronicsam.com/images/greenmachine/2020-02-29-184240_1920x1080_scrot.png
07:08 PM skunkworks: running at 1800mhz helps a little too
11:01 PM fjungclaus1 is now known as fjungclaus