Hello,
I already started a thread over at xenomai.org [1], but I guess its
more efficient to ask here aswell.
The basic concept is that xenomai thread run *below* Linux (threads
and irg handlers), which means that xenomai threads must not use any
linux services like the futex syscall or socket com
- On Nov 22, 2019, at 4:14 AM, Norbert Lange nolang...@gmail.com wrote:
> Hello,
>
> I already started a thread over at xenomai.org [1], but I guess its
> more efficient to ask here aswell.
> The basic concept is that xenomai thread run *below* Linux (threads
> and irg handlers), which means
On 22.11.19 16:42, Mathieu Desnoyers wrote:
- On Nov 22, 2019, at 4:14 AM, Norbert Lange nolang...@gmail.com wrote:
Hello,
I already started a thread over at xenomai.org [1], but I guess its
more efficient to ask here aswell.
The basic concept is that xenomai thread run *below* Linux (thre
Real-time applications with Xenomai threads wishing to use urcu-bp
read-side within real-time threads require to disable use of the
membarrier system call, relying on the fall-back based on regular
memory barriers on the read-side instead. Allow disabling use of
sys_membarrier before liburcu-bp's f
- On Nov 22, 2019, at 10:52 AM, Jan Kiszka jan.kis...@siemens.com wrote:
> On 22.11.19 16:42, Mathieu Desnoyers wrote:
>> - On Nov 22, 2019, at 4:14 AM, Norbert Lange nolang...@gmail.com wrote:
>>
>>> Hello,
>>>
>>> I already started a thread over at xenomai.org [1], but I guess its
>>> m
- On Nov 22, 2019, at 12:00 PM, Mathieu Desnoyers
mathieu.desnoy...@efficios.com wrote:
> Real-time applications with Xenomai threads wishing to use urcu-bp
> read-side within real-time threads require to disable use of the
> membarrier system call, relying on the fall-back based on regular
>
On 22.11.19 18:01, Mathieu Desnoyers wrote:
## membarrier syscall
I haven't got an explanation yet, but I believe this syscall does
nothing to xenomai threads (each has a shadow linux thread, that is
*idle* when the xenomai thread is active).
That's indeed a good point. I suspect membarrier m
Am Fr., 22. Nov. 2019 um 16:52 Uhr schrieb Jan Kiszka :
>
> On 22.11.19 16:42, Mathieu Desnoyers wrote:
> > - On Nov 22, 2019, at 4:14 AM, Norbert Lange nolang...@gmail.com wrote:
> >
> >> Hello,
> >>
> >> I already started a thread over at xenomai.org [1], but I guess its
> >> more efficient t
On 22.11.19 18:44, Norbert Lange wrote:
Am Fr., 22. Nov. 2019 um 16:52 Uhr schrieb Jan Kiszka :
On 22.11.19 16:42, Mathieu Desnoyers wrote:
- On Nov 22, 2019, at 4:14 AM, Norbert Lange nolang...@gmail.com wrote:
Hello,
I already started a thread over at xenomai.org [1], but I guess its
>
> LTTng-UST prepares the ring buffers from lttng-ust's "listener" thread,
> which is injected into the process by a lttng-ust constructor.
>
> What you will care about is how the tracepoint call-site (within a Xenomai
> thread) interacts with the ring buffers.
>
> The "default" setup for lttng-us
Am Fr., 22. Nov. 2019 um 18:52 Uhr schrieb Jan Kiszka :
>
> On 22.11.19 18:44, Norbert Lange wrote:
> > Am Fr., 22. Nov. 2019 um 16:52 Uhr schrieb Jan Kiszka
> > :
> >>
> >> On 22.11.19 16:42, Mathieu Desnoyers wrote:
> >>> - On Nov 22, 2019, at 4:14 AM, Norbert Lange nolang...@gmail.com
> >>
On 22.11.19 19:01, Norbert Lange wrote:
Am Fr., 22. Nov. 2019 um 18:52 Uhr schrieb Jan Kiszka :
On 22.11.19 18:44, Norbert Lange wrote:
Am Fr., 22. Nov. 2019 um 16:52 Uhr schrieb Jan Kiszka :
On 22.11.19 16:42, Mathieu Desnoyers wrote:
- On Nov 22, 2019, at 4:14 AM, Norbert Lange nolang
I still would like to propose having a compile time "off switch",
cant see how this would work with preloaded libraries for one
(lttng itself whips with multiple)
Cant tell for sure now, but a setup where "bulletproof Xenomai"
libraries are used seems to better than special setup magic.
If you hav
- On Nov 22, 2019, at 12:44 PM, Norbert Lange nolang...@gmail.com wrote:
> Am Fr., 22. Nov. 2019 um 16:52 Uhr schrieb Jan Kiszka
> :
>>
>> On 22.11.19 16:42, Mathieu Desnoyers wrote:
[...]
>
>
>> >
>> > That's indeed a good point. I suspect membarrier may not send any IPI
>> > to Xenomai
- On Nov 22, 2019, at 12:55 PM, Norbert Lange nolang...@gmail.com wrote:
>>
>> LTTng-UST prepares the ring buffers from lttng-ust's "listener" thread,
>> which is injected into the process by a lttng-ust constructor.
>>
>> What you will care about is how the tracepoint call-site (within a Xeno
- On Nov 22, 2019, at 1:37 PM, Norbert Lange nolang...@gmail.com wrote:
> I still would like to propose having a compile time "off switch",
> cant see how this would work with preloaded libraries for one
> (lttng itself whips with multiple)
One option would be to introduce an environment vari
Am Fr., 22. Nov. 2019 um 20:00 Uhr schrieb Mathieu Desnoyers
:
>
> - On Nov 22, 2019, at 12:44 PM, Norbert Lange nolang...@gmail.com wrote:
>
> > Am Fr., 22. Nov. 2019 um 16:52 Uhr schrieb Jan Kiszka
> > :
> >>
> >> On 22.11.19 16:42, Mathieu Desnoyers wrote:
>
> [...]
>
> >
> >
> >> >
> >> >
Am Fr., 22. Nov. 2019 um 20:03 Uhr schrieb Mathieu Desnoyers
:
>
> - On Nov 22, 2019, at 12:55 PM, Norbert Lange nolang...@gmail.com wrote:
>
> >>
> >> LTTng-UST prepares the ring buffers from lttng-ust's "listener" thread,
> >> which is injected into the process by a lttng-ust constructor.
> >
- On Nov 22, 2019, at 2:57 PM, Norbert Lange nolang...@gmail.com wrote:
> Am Fr., 22. Nov. 2019 um 20:00 Uhr schrieb Mathieu Desnoyers
> :
>>
>> - On Nov 22, 2019, at 12:44 PM, Norbert Lange nolang...@gmail.com wrote:
>>
>> > Am Fr., 22. Nov. 2019 um 16:52 Uhr schrieb Jan Kiszka
>> > :
>>
> >> >> > Another thing to make sure is to have a glibc and Linux kernel which
> >> >> > perform
> >> >> > clock_gettime() as vDSO for the monotonic clock, because you don't
> >> >> > want a
> >> >> > system call there. If that does not work for you, you can
> >> >> > alternatively
> >> >> > imp
> >> liburcu has configure options allow forcing the usage of this syscall
> >> but not disabling it, which likely is necessary for Xenomai.
> >
> > I suspect what you'd need there is a way to allow a process to tell
> > liburcu-bp (or liburcu) to always use the fall-back mechan
Merged in master and stable-2.11.
Thanks!
Jérémie
On Mon, Nov 18, 2019 at 03:12:20PM -0500, Jonathan Rajotte wrote:
> This mimics what is done on the track side.
>
> Fixes #1210
>
> Signed-off-by: Jonathan Rajotte
> ---
>
> Used wrong issue number.
>
> ---
> src/bin/lttng-sessiond/trace-ust
Merged in master, stable-2.11, and stable-2.10.
Thanks!
Jérémie
On Thu, Nov 07, 2019 at 02:02:55PM -0500, Michael Jeanson wrote:
> The test suite LOG_DRIVER statement requires that automake >= 1.12 be used
> during bootstrap.
>
> Signed-off-by: Michael Jeanson
> ---
> configure.ac | 2 +-
> 1
All three patches of this series were merged in master and
stable-2.11.
Thanks!
Jérémie
On Fri, Nov 01, 2019 at 04:23:03PM -0400, Mathieu Desnoyers wrote:
> Moving the head position of the tracefile array when the data is
> received opens a window where a viewer attaching to the session could
> t
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