[Xenomai] Porting xenomai 2.6.3 and ipipe to 3.12 kernel

Lennart Sorensen lsorense at csclub.uwaterloo.ca
Mon Apr 14 23:06:38 CEST 2014


On Thu, Apr 03, 2014 at 10:16:35AM -0400, Lennart Sorensen wrote:
> On Thu, Apr 03, 2014 at 03:56:26PM +0200, Gilles Chanteperdrix wrote:
> > On 04/03/2014 03:46 PM, Lennart Sorensen wrote:
> > >Load script terminated, terminating checked scripts
> > >---|-----------|-----------|-----------|--------|------|-------------------------
> > >RTS|     -1.140|      2.280|     10.811|       0|     0|    18:21:26/18:21:26
> > >RTD|           0|         795|    63498250
> > >RTD|           0|        4654|  1051007408
> > >RTD|           1|       14862|  1064936835
> > >RTD|           1|         134|    63457021
> > >pipe_in: /tmp/xeno-test-in-9751
> > >
> > >I am guessing that looks successful.
> > 
> > Yes, I guess a 15us worst case interrupt latency is unprecedented
> > for the ARM architecture. The timer anticipation may be a bit too
> > eager for this SOC, which results in negative latencies. What does
> > cat /proc/xenomai/timer say?
> 
> root at omap5:~# cat /proc/xenomai/timer
> status=on+watchdog:setup=488:clock=3556147959244:timerdev=arch_sys_timer:clockdev=ipipe_tsc

Any more info on this?

The negative minimum latency seems a bit odd after all.

-- 
Len Sorensen




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