[LITMUS^RT] Can not register DEMO Scheduler Plugin in LITMUS^RT

[Sanjib Das]

Dear Concern,

Thank you for your reply. Finally I am able to sort out the problem. It was
a problem with my grub configuration. It was not loading the right kernel
package.


Now I am advancing with the DEMO plug in tutorial.
I have another question. Do I have to compile the whole kernel package each
time I make any change in the demo plug in code.
I am asking this question cause it takes a huge time to make bzImage and
install it each time.
So any suggestion to reduce the whole plug in implementation will be
helpful more than I can say.

Thanks in advance

Sanjib


On Sat, Dec 28, 2013 at 3:06 PM, Björn Brandenburg <bbb at mpi-sws.org> wrote:

>
> On 27.12.2013, at 01:33, Sanjib Das <cnt.sanjib at googlemail.com> wrote:
>
> > Dear Concern,
> > First of all Wish you all a Happy New Year,
> > I am still trying to solve the problem registering DEMO plug in a single
> boot Ubuntu PC but I am running out of ideas. As its one part of my
> education part a soon possible reply will help a lot.
> >
> > Another information about KVM. I am trying to load an kvm image of
> ubuntu which already included  with litmust patch. But it requires  an user
> name and password. So, this information is also required .
> >
> > Thanks in advance
> >
> > Sanjib
> >
> >
> > On Thu, Dec 19, 2013 at 11:04 PM, Sanjib Das <cnt.sanjib at googlemail.com>
> wrote:
> > Hi,
> > If I am not mistaken I have followed the steps from litmus-rt wiki.
> Codes are just copy pest.
> > I have attached my sched_demo.c.
> >
> > Thanks in advance
> >
> > Sanjib
> >
> >
> > On Thu, Dec 19, 2013 at 9:00 PM, Björn Brandenburg <bbb at mpi-sws.org>
> wrote:
> >
> > On 19 Dec 2013, at 00:55, Sanjib Das <cnt.sanjib at googlemail.com> wrote:
> > > I have added sched_demo.o in the Makefile, and compile kernel using
> 'make bzImage' then make modules following make module_install and make
> install. then update grub for the new kernel version.
> > > After reboot your given command gives the following output::
> > > sdas at sd-lab:~$ dmesg | grep 'Registering'
> > > [    0.427574] PM: Registering ACPI NVS region [mem
> 0x77758000-0x777befff] (421888 bytes)
> > > [    3.448036] Registering LITMUS^RT plugin Linux.
> > > [    3.448188] Registering LITMUS^RT plugin GSN-EDF.
> > > [    3.448192] Registering LITMUS^RT plugin PSN-EDF.
> > > [    3.448205] Registering LITMUS^RT plugin P-FP.
> > > [    3.448206] Registering LITMUS^RT plugin C-EDF.
> > > sdas at sd-lab:~$
> > >
> >
> > Weird. Can you please post your sched_demo.c?
> >
> > Thanks,
> > Björn
>
>
> Dear Sanjib,
>
> somehow your plugin file is not properly hooked up to the build system.
> The kernel should definitely print "Registering LITMUS^RT plugin DEMO”
> during the boot process, regardless of whether the plugin is correctly
> implemented or not. You can verify this yourself by inspecting the
> implementation of register_sched_plugin() in litmus/sched_plugin.c. You’ll
> need to figure out why demo file is not being linked into the kernel image.
> As a start, you should verify that it is being compiled (e.g., by
> introducing a syntax error and verifying that the build fails).
>
> Regards,
> Björn
>
>
> _______________________________________________
> litmus-dev mailing list
> litmus-dev at lists.litmus-rt.org
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>
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