On 15/05/2019 18:45, Ravindra Kumar Meena wrote:
On Wed, May 15, 2019 at 5:27 PM Sebastian Huber
<sebastian.hu...@embedded-brains.de
<mailto:sebastian.hu...@embedded-brains.de>> wrote:
On 15/05/2019 13:50, Ravindra Kumar Meena wrote:
Is lttng under a suitable license (I think no) and portable to RTEMS?
I found this at the bottom of LTTng website. https://lttng.org/
" The LTTng Documentation is licensed under CC BY 4.0. LTTng-tools is
licensed under LGPLv2.1 and GPLv2. LTTng-UST is licensed under
LGPLv2.1, the MIT license and GPLv2. LTTng-modules is licensed under
LGPLv2.1, GPLv2 and the MIT license. "
I am not sure what type of license is suitable.
RTEMS requires permissive licenses, e.g.
https://devel.rtems.org/wiki/Developer/Contributing#LegalRequirements
I think you suggested to use LTTng-UST:
https://github.com/lttng/lttng-ust/blob/master/LICENSE
"LTTng UST (User-Space Tracer) Licensing
Mathieu Desnoyers
December 5, 2012
* LGPLv2.1
This library is distributed under the LGPLv2.1 license. It is intended
to allow use of the tracer API from both free and proprietary software.
* MIT license :
Public header files, and LTTng filter runtime code are distributed under
the MIT license. See mit-license.txt for details.
* GPLv2
Library test code is distributed under the GPLv2 license, as specified
in the
per-file license. See gpl-2.0.txt for details. A copy of the
perf_event.h Linux kernel installed header file is also licensed under
GPLv2."
So, the support library is LGPLv2.1, which is not suitable for RTEMS.
Does it meet the performance requirements?
How do I check that? These are the features of LTTng
https://lttng.org/features/
LTTng has several parts, you should be more specific. I guess you mean
the LTTng User Space Tracing (LTTng-UST) library. There are two issues
with it
1. it uses LGPLv2.1, and
2. it supports currently only the Linux user space.
I don't think porting it to RTEMS makes sense as a part of this GSoC
project.
--
Sebastian Huber, embedded brains GmbH
Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone : +49 89 189 47 41-16
Fax : +49 89 189 47 41-09
E-Mail : sebastian.hu...@embedded-brains.de
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