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? Thanks - Krishna
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