[LITMUS^RT] How to stop all the rt-tasks manually

[Björn Brandenburg]

On 09 Feb 2014, at 05:11, Sanjib Das <cnt.sanjib at googlemail.com> wrote:

> Dear Concern,
> 
> I am wondering if there is any way to kill all the running real-time task manually. 

Have you tried killall?

- Björn


> 
> I am trying to run G-EDF and C-EDF with different tasks and because of wrong parameter I found "rcu_preempt detected stalls on cpus/tasks", as a result my rt tasks were still running. 
> 
> "
> [ 2072.588370] Could not switch plugin: -16
> [ 2107.177026] Could not switch plugin: -16
> [ 2120.735386] Could not switch plugin: -16
> [ 2131.718955] Could not switch plugin: -16
> [ 2173.427350] INFO: rcu_preempt detected stalls on CPUs/tasks: {} (detected by 1, t=600017 jiffies, g=53906, c=53905, q=0)
> [ 2173.427371] INFO: Stall ended before state dump start
> [ 2189.814720] Could not switch plugin: -16
> [ 2353.473222] INFO: rcu_preempt detected stalls on CPUs/tasks: {} (detected by 1, t=780022 jiffies, g=53906, c=53905, q=0)
> [ 2353.473241] INFO: Stall ended before state dump start
> [ 2533.519115] INFO: rcu_preempt detected stalls on CPUs/tasks: {} (detected by 1, t=960027 jiffies, g=53906, c=53905, q=0)
> [ 2533.519131] INFO: Stall ended before state dump start
> 
> "
> 
> 
> Though I ran the command using sudo,
> "
> Error: Cannot write to /proc/litmus/active_plugin. Do you have root privileges?
> Error: Setting new plugin failed.
> Are there any active real-time tasks?
> sdas at sdas-lab:~/littest/liblitmus$ 
> "
> 
> Any suggestions will be very helpful. 
> 
> Thanks in advance