schedtool For Linux

schedtool project was born, because there was no tool to change or query CPU-scheduling policies under Linux. Support for CPU-affinity has also been added and most recently (re-)nicing of processes. Thus, schedtool is the definitive interface to Linux's scheduler.

It can be used to avoid skipping for A/V-applications, to lock processes onto certain CPUs on SMP/NUMA systems, which may be beneficial for networking or benchmarks, or to adjust nice-levels of lesser important jobs to maintain a high amount of interactive responsiveness under high load.

All output, even errors, go to STDOUT to ease piping.

If you don't know about scheduling policies, you probably don't want to use this program - or learn and read "man sched_setscheduler".

Certain modes (as of this writing: SCHED_BATCH and SCHED_ISO) need a patched kernel.