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* [Xenomai-help] Kernel configuration suggestions/hints
@ 2011-10-04  8:42 Julien Delange
  2011-10-04 11:16 ` Gilles Chanteperdrix
  0 siblings, 1 reply; 13+ messages in thread
From: Julien Delange @ 2011-10-04  8:42 UTC (permalink / raw)
  To: Xenomai help

Dear all,

I am currently building a customized kernel to build a real-time
application. At this time, the requirement is very basic : I have one
periodic task in userland that acquires data from an analogy card
(ni6071e) with a 1ms period/deadline. At that time, the task miss one
deadline at each period, meaning that the code is executed in 2ms
instead of 1ms (and so, the deadline expires). So, I configured my
kernel without power management and with a timer at 1000Hz and a
tickless system (see variables below). However I would like to know if
there are other relevant configuration parameters that may influence
the scheduling of xenomai tasks so that I can make sure that my
application meets its requirements. If anyone has a feedback about
kernel configuration in that scope, it might be really useful ! In
addition, depending on your answer, it may be also good to report good
practices about the kernel configuration on the wiki, what do you
think about it ?

Thanks for any suggestion,

Kernel configuration variables:
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_PREEMPT=y
CONFIG_HZ_1000=y
CONFIG_HZ=1000
CONFIG_PM is not set
CONFIG_SFI is not set
CONFIG_CPU_FREQ is not set
CONFIG_CPU_IDLE is not set


^ permalink raw reply	[flat|nested] 13+ messages in thread

end of thread, other threads:[~2011-10-06  7:25 UTC | newest]

Thread overview: 13+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2011-10-04  8:42 [Xenomai-help] Kernel configuration suggestions/hints Julien Delange
2011-10-04 11:16 ` Gilles Chanteperdrix
2011-10-04 13:06   ` Julien Delange
2011-10-04 13:40     ` Fernando Herrero Carrón
2011-10-04 13:45     ` Gilles Chanteperdrix
2011-10-04 13:51       ` Julien Delange
2011-10-04 16:41         ` Gilles Chanteperdrix
2011-10-05  7:48           ` Julien Delange
2011-10-05 11:09             ` Gilles Chanteperdrix
2011-10-05 14:39               ` Fernando Herrero Carrón
2011-10-05 21:28                 ` Alexis Berlemont
2011-10-05 22:55                   ` Fernando Herrero Carrón
2011-10-06  7:25                     ` Julien Delange

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