How to reduce the RTEMS BSP build time
sebastian.huber at embedded-brains.de
Fri Dec 7 09:12:40 UTC 2018
On 07/12/2018 07:36, Amarnath MB wrote:
> I am a noob to RTEMS. Currently working on developing an RTEMS 4.11
> BSP for a new SOC based on ARM926EJS.
for new BSPs I strongly recommend to use the master branch and not a
> I have taken lpc32xx_mzx as the reference BSP and I was able to
> successfully build the BSP in Ubuntu 16.04 using the steps in
> RTEMS user manual.
> Below is the time taken for completing each step in BSP building:
> 1. bootstrapping takes 20 mins,
If your Ubuntu machine has only one processor, then it is not much you
can do to speed things up.
You can use the sb-bootstrap command of the RSB:
> 2. configuring takes 3 mins
It is not much you can do to speed things up here. I guess you have a
slow mass storage.
> 3. make takes 18 mins
> 4. install takes 4 mins
You can try to do a parallel build, e.g.
make -j $(nproc)
> When I give a make after adding some changes in the start.S file, the
> changes are not reflected in the hello.exe sample.
> I need to give a clean and then a make to have the changes reflect in
> the hello.exe, as a result, each make takes 18 mins
> which is very huge compared to other builds like u-boot.
> Is there a way that I can reduce this build time?
The RTEMS master is a bit faster if you do a parallel build. I would
develop BSPs outside the main RTEMS sources and when everything is
finished integrate it in the RTEMS tree.
> Thanks in advance for all your support.
> *Thank you & Regards,*
> *Amarnath MB *
> users mailing list
> users at rtems.org
Sebastian Huber, embedded brains GmbH
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