Re: [Xenomai] arm & 64bit atomics

2014-07-03 Thread Gilles Chanteperdrix
On 07/03/2014 04:56 PM, Michael Haberler wrote: > we found this: > http://stackoverflow.com/questions/9857760/can-an-arm-interrupt-occur-in-mid-instruction > and are considering which impact that has on machinekit, which uses doubles > in memory shared between threads, relying on updates being a

Re: [Xenomai] Xenomai-forge: Deadlock in finalize_thread()

2014-07-03 Thread Philippe Gerum
On 07/03/2014 10:11 AM, Kim De Mey wrote: What I think that goes wrong is that the lock which is taken in threadobj_notify_entry() is not released before threadobj_start() continues at wait_on_barrier(thobj, __THREAD_S_ACTIVE). Until threadobj_notify_entry() releases that lock, there is no way

[Xenomai] arm & 64bit atomics

2014-07-03 Thread Michael Haberler
we found this: http://stackoverflow.com/questions/9857760/can-an-arm-interrupt-occur-in-mid-instruction and are considering which impact that has on machinekit, which uses doubles in memory shared between threads, relying on updates being atomic I wonder if this topic has come up in the Xenomai

Re: [Xenomai] Support of Beagleboard xm rev C on 3.14-ipipe

2014-07-03 Thread Gilles Chanteperdrix
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 07/03/2014 10:38 AM, Arnaud Degroote wrote: > On 02/Jul - 19:59, Gilles Chanteperdrix wrote: >> -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 >> >> >> Well, this sucks, posted writes increase the timer programming >> latency. >> >> Does the laten

Re: [Xenomai] Xenomai on PhyCore/Board

2014-07-03 Thread Gilles Chanteperdrix
On 07/03/2014 10:22 AM, Frede Florian wrote: > Hello, > > We started a new real time project. For this project we decided to > compare the PREEMPT_RT and Xenomai on our future hardware. For this we > got two developer board from Phytec. > > * Linux-phyCORE-AM335x-Kit > > (https://www.osa

Re: [Xenomai] Support of Beagleboard xm rev C on 3.14-ipipe

2014-07-03 Thread Arnaud Degroote
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[Xenomai] Xenomai on PhyCore/Board

2014-07-03 Thread Frede Florian
Hello, We started a new real time project. For this project we decided to compare the PREEMPT_RT and Xenomai on our future hardware. For this we got two developer board from Phytec. * Linux-phyCORE-AM335x-Kit (https://www.osadl.org/Profile-of-system-in-rack-7-slot-5.qa-profile-r7s5.0.htm

[Xenomai] Xenomai-forge: Deadlock in finalize_thread()

2014-07-03 Thread Kim De Mey
Hello, I've encountered a deadlock in the finalize_thread() call in threadobj.c I can easy reproduce the problem with a simple test case where I have a psos task which in a loop creates, starts and deletes another psos task. The created tasks have a priority lower or equal to the priority of the