Re: [Xenomai-core] Backfire: User <-> Kernel latancy mesurement tool on Xenomai

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

krishna m wrote:
> I ported the backfire tool in the OSADL site [https://www.osadl.org/backfire-4.backfire.0.html] to measure the user to/from kernel latency.I wanted to measure the difference between the RT_PREEMPT kernel and Xenomai Kernel. Surprisingly i see RT_PREEMPT performance better than Xenomai. 
>  
> Here are few points to note:
> 1. The thread priority of the "sendme" tool of backfire in RT_PREEMPT is 99 [highest]
> 2. I have made the thread priority 99 for the rt_task that i spawn [par of ported sendme]
> ret = rt_task_shadow(&rt_task_desc, NULL, 99, 0);
>  
> My Questions:
> * I wanted to know if any one has done such measurements using backfire and how dose Xenomai fair agnist RT_PREEMPT?
> * is there any similar tool like backfire in the Xenomai tool set that dose the similar measurements?
> * Do I need to do more Xenomai specific optimization in the "sendme" and "backfire" code to get better performance?

Useless notes, useless questions. Show us the "ported" code.


-- 
					    Gilles.