[LITMUS^RT] Experiment Script

Fri May 2 23:28:09 CEST 2014

Hi Glenn,
Thank you very much for the suggestion. But before need another suggestion :
I got this output by generating experiment with default values and the run
script could not make it simulate.

root at lubdhok-*lab:~/littest/experiment-scripts# ./gen_exps.py *
Creating experiments with G-EDF generator...
Creating experiments with P-EDF generator...
Creating experiments with C-EDF generator...
Experiments saved in /home/sdas/littest/experiment-scripts/exps.
*root at lubdhok-lab:~/littest/experiment-scripts# ./run_exps.py *
Reading schedules from exps/*.
[Exp GSN-EDF_tasks=16_release-master=False]: Loading experiment 1 of 28.
[Exp GSN-EDF_tasks=16_release-master=False]: Enabling Logger
[Exp GSN-EDF_tasks=16_release-master=False]: Writing 0 proc entries
[Exp GSN-EDF_tasks=16_release-master=False]: Starting 1 regular tracers
[Exp GSN-EDF_tasks=16_release-master=False]: Switching to GSN-EDF
[Exp GSN-EDF_tasks=16_release-master=False]: Starting 16 tasks
[Exp GSN-EDF_tasks=16_release-master=False]: Sleeping until tasks are ready
for release...
[Exp GSN-EDF_tasks=16_release-master=False]: Starting 0 released tracers
[Exp GSN-EDF_tasks=16_release-master=False]: Releasing 16 tasks
[Exp GSN-EDF_tasks=16_release-master=False]: Waiting for program to
finish...
[Exp GSN-EDF_tasks=16_release-master=False]: Stopping exact tracers
[Exp GSN-EDF_tasks=16_release-master=False]: Saving results in
/home/sdas/littest/experiment-scripts/run-data/sched=GSN-EDF_tasks=16_release-master=False
[Exp GSN-EDF_tasks=16_release-master=False]: Stopping regular tracers
[Exp GSN-EDF_tasks=16_release-master=False]: Switching back to Linux
scheduler
[Exp GSN-EDF_tasks=16_release-master=False]: Experiment done!
[Exp C-EDF_tasks=8_release-master=True]: Loading experiment 2 of 28.
[Exp C-EDF_tasks=8_release-master=True]: Enabling Logger
[Exp C-EDF_tasks=8_release-master=True]: Writing 2 proc entries
[Exp C-EDF_tasks=8_release-master=True]: Starting 1 regular tracers
[Exp C-EDF_tasks=8_release-master=True]: Switching to C-EDF
[Exp C-EDF_tasks=8_release-master=True]: Starting 8 tasks
[Exp C-EDF_tasks=8_release-master=True]: Sleeping until tasks are ready for
release...

*Non-zero return 234: /home/sdas/littest/liblitmus/rtspin -w -p 3 34 100
30Non-zero return 234: /home/sdas/littest/liblitmus/rtspin -w -p 3 13 50
30[Exp C-EDF_tasks=8_release-master=True]: Re-released 6 tasks[Exp
C-EDF_tasks=8_release-master=True]: Killing all tasks[Exp
C-EDF_tasks=8_release-master=True]: Stopping regular tracers[Exp
C-EDF_tasks=8_release-master=True]: Switching back to Linux schedulerecho:
write error: Device or resource busyFailed experiment
C-EDF_tasks=8_release-master=TrueTask 0 failed with status: 234Task 0
failed with status: 234*
Check dmesg, tmp/exec-out.txt, and tmp/exec-err.txt
[Exp PSN-EDF_tasks=4_release-master=False]: Loading experiment 3 of 28.
[Exp PSN-EDF_tasks=4_release-master=False]: Switching back to Linux
scheduler
echo: write error: Device or resource busy
System is corrupted! Fix state before continuing.
Scheduler is C-EDF, cannot switch to Linux!
6 real-time tasks still running!
no crontab for root
Experiments ran:        3 of 28
  Successful:           1
  Failed:               2
  Already Done:         0
  Invalid Environment:  0
Successful experiment data saved in run-data.
root at lubdhok-lab:~/littest/experiment-scripts#

And always I have to reboot my OS kubuntu
(root at lubdhok-lab:~/littest/experiment-scripts#
uname -a
Linux lubdhok-lab 3.10.5-litmus-rt-155192-g5b50be0 #3 SMP PREEMPT Fri Apr
25 11:09:11 CEST 2014 x86_64 x86_64 x86_64 GNU/Linux)

Thanks in advance
Sanjib

On Tue, Apr 22, 2014 at 6:06 PM, Glenn Elliott <gelliott at cs.unc.edu> wrote:

>
> On Apr 22, 2014, at 8:15 AM, Sanjib Das <cnt.sanjib at googlemail.com> wrote:
>
> Dear Everyone,
>
> I am using the experiment script from the following link
> https://github.com/LITMUS-RT/experiment-scripts to generate the synthetic
> tasks and was able to simulate for PSN-EDF.
>
> Can anyone help me how can I generate a reasonable about of taskset for
> simulation using PFAIR scheduling algorithm(Implementation of the PD^2
> pfair scheduling algorithm. This implementation realizes "early releasing),
> provided in LIRMUS-RT version 2013.1.
>
> I would be glade with any information that leads me to simulate the
> mentioned algorithm above.
>
> Regards
> Sanjib
>
>
>
> Hi Sanjib,
>
> In response to your other email on the availability of PFAIR, it’s in the
> latest Litmus kernel (code:
> https://github.com/LITMUS-RT/litmus-rt/blob/master/litmus/sched_pfair.c).
>  Just make sure that you properly configure the kernel at compile-time to
> get it.  As you might see in litmus/Kconfig (
> https://github.com/LITMUS-RT/litmus-rt/blob/master/litmus/Kconfig#L15),
> CONFIG_HIGH_RES_TIMERS and CONFIG_HZ_PERIODIC must be set and CONFIG_HZ
> must == 1000.
>
> Regarding the experiment-scripts, currently there are no task-set
> generators for pfair.  I believe you could quickly copy and modify the
> C-EDF generator to create task sets for pfair (this is because the pfair
> plugin can be clustered along cache-level boundaries, just like C-EDF).
>
> My suggestion:
> Step 1: Replicate the CedfGenerator (
> https://github.com/LITMUS-RT/experiment-scripts/blob/master/gen/edf_generators.py#75),
> naming it CpfairGenerator or some such, and make the appropriate changes to
> make it use pfair.
> Step 2: Add your new generator to gen/__init__.py (
> https://github.com/LITMUS-RT/experiment-scripts/blob/master/gen/__init__.py
> )
> Step 3: I think that’s it.  You should be able to follow the tutorial for
> gen_exps.py here: https://github.com/LITMUS-RT/experiment-scripts
>
> These changes should take more than 30 minutes to add and test (assuming
> that I haven’t missed anything).  I’d be happy to accept a patch that adds
> pfair functionality.
>
> -Glenn
>
> _______________________________________________
> litmus-dev mailing list
> litmus-dev at lists.litmus-rt.org
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>
>
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