Linux Response time

[Altera_Forum]

I try to evaluate context-switch response time. 

I use 2 threads and 2 mutexes. Thread A waits for mutex A and releases mutex B, thread B releases mutex A and waits for mutex B.  It gives me the following (in microseconds) 27 µs for µC/OS-II on NIOSII 'fast' at 50 MHz. 430 µs for Linux on NIOSII (same configuration). [As a reference, 29 µs for VxWorks on a 133MHz AMD5x86]  Is Linux really so bad (16 times) ? Is there something faster than pthread_() ?

[Altera_Forum]

Hi Bruno, 

 Just to let you know, we are currently doing some uClinux / Nios II benchmarking and hope to have something out next week. We will post the results to the forum when they are ready.  Best regards, Robert Microtronix