[CXP] some questions about "Common Xenomai Platform"

hailong hailongliiu at yeah.net
Thu Jan 7 16:52:31 CET 2021

At 2021-01-04 01:38:04, "Philippe Gerum" <rpm at xenomai.org> wrote:
>Hailongliu via Xenomai <xenomai at xenomai.org> writes:
>> Hi,
>> I learned the "Common Xenomai Platform" program from this mail-list and wiki
>> of project Xenomai. This is a very attractive plan, as it will port Xenomai for
>> recent LTS kernel(v5.10).
>> I noticed that  March 31, 2021 is the deadline for "CXP", dose that mean we
>> can expect the new features at Xenomai-3.3 ?
>Yes, that is the plan. Xenomai 3.3 is going to be the first release
>fully implementing the CXP. Xenomai 4 which is going to use a different
>real-time core will be developed in parallel to Xenomai 3.3, aiming at
>CXP-compliance too. It should be clear that March 31, 2021 is the date
>for completing the CXP specification, not that of any release
>implementing it, which can only happen later by definition.

Will the CXP or Xenomai 4 compatible with RT-patch over time?
In addition,   I learned that the legacy RTOS emulators (such as VxWorks)
will be excluded from Xenomai 3.x , neither Xenomai 4?

>> I also concern about that how long Xenomai-3.3 will be live? And if there
>> will be a long term version with kernel-v5.10 for Xenomai?
>Xenomai will run v5.10 LTS as soon as release 3.2, based on the ongoing
>port of the Cobalt core to Dovetail.
>How long a particular Xenomai release is maintained for a particular
>kernel version currently depends on a few individuals and companies
>having a specific requirement to keep such port alive, and contributing
>to this task directly (doing the work) or indirectly (funding someone
>else's work).
>Although there is a commitment to run Xenomai 3.x on top of kernel v5.10
>asap, I'm not aware of any formal commitment of any current contributor
>to maintain this port for a pre-defined period of time. One may only
>assume that by picking a LTS kernel like v5.10, we are likely going to
>maintain it "for some time".


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