Hello, We are using same BSP , kernel 3.18.11 rt7, with 2 different hardwares: 1. kontron board - i7 cpu 2. portwell board. - atom cpu (E3845 ) The results are totally different with the same testing. In kontron the error is 11usec, while in portwell it is 2000usec . The results of portwell seems more than just bad - they same unbelievable, the error is VERY high (2msec). I've tried to find a benchmark which can support my results, but found no benchmark with ATOM. Thank you for any suggestion. Ranran -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html