From: Philippe Gerum <rpm@xenomai.org>
To: alex alex <duch.alexandre@gmail.com>
Cc: Xenomai <xenomai@xenomai.org>
Subject: Re: [Xenomai] [QUESTION] thread creation and hook function
Date: Mon, 15 Apr 2013 14:36:13 +0200 [thread overview]
Message-ID: <516BF43D.7070708@xenomai.org> (raw)
In-Reply-To: <CAPpP=rMRx5CKj2uJv3wBSu=UUb88W2nXy73z1B6ewBgXEQNYiQ@mail.gmail.com>
On 04/15/2013 12:25 PM, alex alex wrote:
> linux kernel : 3.2.21
> xenomai version : 2.6.2.1
> arch: x86
>
> Thank, I add your code and now I have :
>
> case 1 : ( without nanosleep(0) )
>
> 6138.151187] TRD: 394830ns - NOM "ROOT/0" - CPU 0 - RT:1 - linux
> [ 6138.159924] TRD: 9127501ns - NOM "hook" - CPU 0 - RT:0 - shadow
> [ 6138.159953] TRD: 9163835ns - NOM "ROOT/0" - CPU 0 - RT:1 - linux
> [ 6138.160014] TRD: 370242723ns - NOM "ROOT/0" - CPU 0 - RT:1 - linux
> [ 6138.520008] TRD: 370429306ns - NOM "ROOT/0" - CPU 0 - RT:1 - linux
> [ 6139.521009] TRD: 1370433173ns - NOM "hook" - CPU 0 - RT:1 - user-space
> shadow in real-time mode
> [ 6139.521014] TRD: 1370446122ns - NOM "ROOT/0" - CPU 0 - RT:1 - linux
> [ 6139.521705] TRD: 1371147808ns - NOM "ROOT/0" - CPU 0 - RT:1 - linux
> [ 6139.521723] TRD: 1371168314ns - NOM "ROOT/0" - CPU 0 - RT:1 - linux
>
> case 2 : ( with nanosleep(0) before the loop )
>
> [ 6144.996779] TRD: 382277ns - NOM "ROOT/0" - CPU 0 - RT:1 - linux
> [ 6145.005024] TRD: 8625148ns - NOM "hook" - CPU 0 - RT:0 - shadow
> [ 6145.005054] TRD: 8659990ns - NOM "ROOT/0" - CPU 0 - RT:1 - linux
> [ 6145.008013] TRD: 8730535ns - NOM "ROOT/0" - CPU 0 - RT:1 - linux
> [ 6145.008013] TRD: 8734846ns - NOM "hook" - CPU 0 - RT:1 - user-space
> shadow in real-time mode
> [ 6145.008013] TRD: 367409427ns - NOM "ROOT/0" - CPU 0 - RT:1 - linux
> [ 6145.363763] TRD: 367634768ns - NOM "ROOT/0" - CPU 0 - RT:1 - linux
> [ 6146.363810] TRD: 1367637465ns - NOM "hook" - CPU 0 - RT:1 - user-space
> shadow in real-time mode
> [ 6146.363815] TRD: 1367646922ns - NOM "ROOT/0" - CPU 0 - RT:1 - linux
> [ 6146.365055] TRD: 1368896836ns - NOM "ROOT/0" - CPU 0 - RT:1 - linux
> [ 6146.365073] TRD: 1368916343ns - NOM "ROOT/0" - CPU 0 - RT:1 - linux
>
> If I follow these outputs, this means that the loop is made by a linux task
> and if I add a nanosleep just before, the loop is done by the xenomai task.
> Moreover, "hook " switch in primary mode only when it is destroyed unless we
> force a primary switch with nanosleep(0) before the loop.
>
> Is a xenomai thread shouldn't start in primary mode
It certainly does.
or maybe it wait for a
> rt service to switch in primary mode?
>
I can't give you any information. I downloaded your code and can't see
any "hook" task. There is a "hook" driver, a "tr_sleep" task, but
nothing else. Besides, your Makefile should use xeno-config for getting
the proper build flags. Handcrafting this is the fastest path to hell
with the POSIX skin.
Until I can make sense of the output you mention looking at the actual
code, I won't be able to help.
/proc/xenomai/sched and /proc/xenomai/stat may help to determine who is
running, in which mode.
--
Philippe.
next prev parent reply other threads:[~2013-04-15 12:36 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-13 16:58 [Xenomai] [QUESTION] thread creation and hook function alex alex
2013-04-13 17:41 ` Gilles Chanteperdrix
2013-04-13 18:20 ` alex alex
2013-04-13 20:55 ` Gilles Chanteperdrix
2013-04-13 22:41 ` alex alex
2013-04-13 23:05 ` Gilles Chanteperdrix
2013-04-13 23:07 ` Gilles Chanteperdrix
2013-04-13 23:37 ` Gilles Chanteperdrix
2013-04-15 8:47 ` alex alex
2013-04-15 9:14 ` Philippe Gerum
2013-04-15 10:25 ` alex alex
2013-04-15 12:36 ` Philippe Gerum [this message]
2013-04-15 13:05 ` Philippe Gerum
2013-04-15 13:08 ` Philippe Gerum
2013-04-15 13:43 ` alex alex
2013-04-15 13:48 ` alex alex
2013-04-15 14:06 ` Philippe Gerum
[not found] ` <CAPpP=rMsqp5SOfq8_dNUOZ5UFugNa-YwsLyT5WT4d01_UTWRMA@mail.gmail.com>
2013-04-15 14:27 ` Philippe Gerum
2013-04-15 19:45 ` Gilles Chanteperdrix
2013-04-16 7:03 ` Philippe Gerum
2013-04-15 19:43 ` Gilles Chanteperdrix
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