Linux crashed :(
27 Jan 2017 01:57 - 27 Jan 2017 01:58 #86758
by oceax
Linux crashed :( was created by oceax
Recently upgraded from 2.6 to 2.7 but i have also tried more aggressive timing settings and stepper movement speed, suddenly when i was milling, linux stopped
Last edit: 27 Jan 2017 01:58 by oceax.
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27 Jan 2017 02:39 #86759
by PCW
Replied by PCW on topic Linux crashed :(
When you said "more aggressive timing settings", what were you referring to?
No motion timing or step timing should have any real effect on Linux
if you are using hardware stepgens
No motion timing or step timing should have any real effect on Linux
if you are using hardware stepgens
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27 Jan 2017 10:06 #86766
by oceax
Replied by oceax on topic Linux crashed :(
Ok, yes i use hardware stepgens. So i think the problem has to do with linuxcnc 2.7, because i have never had this problem before with 2.6 :/
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27 Jan 2017 12:41 #86772
by PCW
Replied by PCW on topic Linux crashed :(
Just guessing but it looks more kernel/low level servo thread related rather than LinuxCNC version related
What servo thread rate are you using?
What servo thread rate are you using?
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27 Jan 2017 13:10 #86775
by tommylight
Replied by tommylight on topic Linux crashed :(
Have a look at the top of the attached picture, it clearly says it could not handle a paging request, and is always a sign of failing memory, it has the address of the memory it failed to write or read.
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28 Jan 2017 18:40 #86847
by oceax
Replied by oceax on topic Linux crashed :(
in my ini file i have [EMCMOT]. SERVO_PERIOD=50000
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28 Jan 2017 18:42 #86848
by oceax
Replied by oceax on topic Linux crashed :(
Ok thanks,.... but could also be something with swap space or hard drive errors? but i will run a memtest
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28 Jan 2017 19:19 #86851
by PCW
That's very likely why it crashed, a 20Khz servo thread is simply way too fast for most PCs/hardware
a 1000000 ns (1 ms) servo period is standard and unless you have a good reason to decrease this period
it should be left alone
Replied by PCW on topic Linux crashed :(
in my ini file i have [EMCMOT]. SERVO_PERIOD=50000
That's very likely why it crashed, a 20Khz servo thread is simply way too fast for most PCs/hardware
a 1000000 ns (1 ms) servo period is standard and unless you have a good reason to decrease this period
it should be left alone
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