Dear Sir:
I have a Intel Atom J1900, using Ubuntu 16.04, Kernel version:4.9.24, patch
with xenomai 3.0.5, using ipipe-core-4.9.24-x86-2.patch.
When I start to run the latency test, I get this result(it is not
good):/******************************************************/RTT| 00:00:43
(periodic user-mode task, 100 us period, priority 99)RTH|----lat min|----lat
avg|----lat max|-overrun|---msw|---lat best|--lat worstRTD| 0.192|
0.621| 10.228| 5| 0| 0.070| 130.271RTD| 0.312|
0.512| 116.038| 6| 0| 0.070| 130.271RTD| 0.311|
0.513| 6.818| 6| 0| 0.070| 130.271RTD| 0.311|
0.609| 13.132| 6| 0| 0.070| 130.271RTD| 0.178|
0.643| 10.743| 6| 0| 0.070| 130.271RTD| 0.309|
0.482| 4.416| 6| 0| 0.070| 130.271RTD| 0.057|
0.549| 10.501| 6| 0| 0.057| 130.271RTD| 0.297|
0.643| 16.239| 6| 0| 0.057| 130.271RTD| 0.164|
0.683| 9.876| 6| 0| 0.057| 130.271RTD| 0.308|
0.410| 2.888| 6| 0| 0.057| 130.271RTD| 0.139|
0.474| 169.443| 7| 0| 0.057| 169.443RTD| 0.318|
0.400| 2.924| 7| 0| 0.057| 169.443RTD| 0.318|
0.442| 3.559| 7| 0| 0.057| 169.443RTD| 0.137|
0.434| 3.379| 7| 0| 0.057| 169.443RTD| 0.316|
0.465| 125.119| 8| 0| 0.057| 169.443RTD| 0.316|
0.410| 5.106| 8| 0| 0.057| 169.443RTD| 0.231|
0.477| 3.953| 8| 0| 0.057| 169.443RTD| 0.303|
0.549| 5.225| 8| 0| 0.057| 169.443RTD| 0.279|
0.443| 6.689| 8| 0| 0.057| 169.443RTD| 0.218|
0.428| 6.521| 8| 0| 0.057| 169.443RTD| 0.109|
0.468| 122.246| 9| 0| 0.057|
169.443/*****************************************************************************/
For the Intel X86 SMI thing,here is my system setting(could not be
disabled):/**********************************************************************************/root@googol:/home/googol#
dmesg |grep -i xenomai[ 0.000000] Kernel command line:
BOOT_IMAGE=/vmlinuz-4.9.24 root=UUID=ba9a8ea7-08a9-4772-9744-da7b70a9360f ro
quiet splash vt.handoff=7 xenomai.smi=enabled[ 1.694624] [Xenomai]
scheduling class idle registered.[ 1.694626] [Xenomai] scheduling class rt
registered.[ 1.694670] [Xenomai] SMI-enabled chipset found[ 1.694688]
[Xenomai] SMI workaround failed![ 1.694731] I-pipe: head domain Xenomai
registered.[ 1.695859] [Xenomai] Cobalt v3.0.5 (Sisyphus's Boulder)
/**************************************************************************************/
The attached file is my kernel config file.According to the testing result, it
seems that the system has large latency, so it is not good when doing realtime
control.Could you help me to improve its realtime behavior, or guide me how to
improve it?
--------------------------------
Best regards
Lukewen
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