isolcpus — Isolate CPUs from the kernel scheduler.
Remove the specified CPUs, as defined by the
cpu_number values, from the general
kernel SMP balancing and scheduler algroithms. The only way to move
a process onto or off an "isolated" CPU is via the CPU affinity
cpu_number begins at
0, so the maximum value is 1 less than the
number of CPUs on the system.
This option is the preferred way to isolate CPUs. The alternative, manually setting the CPU mask of all tasks in the system, can cause problems and suboptimal load balancer performance.