Hello everyone. I'm using 4.4.162-rt175 and a core i3-4170 processor. I would like my only real-time process (1 thread) to run on an isolated core, without interruptions by the local timer. * Support for fully tickless opration is enabled in the kernel configuration CONFIG_NO_HZ_FULL=y * Kernel boot parameters for isolating CPU 1, isolcpus=1 nohz=on nohz_full=1 rcu_nocbs=1 However, even when I haven't assigned any process to CPU 1, it's being interrupted by the timer tick at a rate of 1 KHz (HZ_1000=y), as seen in the output of cat /proc/interrupts 1- Is there something I'm missing in the configuration or boot parameters? 2- If tickless operation is not possible, what is the second-best combination of timer tick handling and timer frequency configurations? Is "Periodic timer ticks" preferable to "Idle dynticks system"? Is a lower timer frequency better as the only process on the isolated CPU gets interrupted less? Best, Mohsen
