On Fri, 08 Jun 2018 16:49:48 -0500, Àbéjídé Àyodélé said: > I have a machine with 80 cores and I had a burst of requesting more cpu > period than the available number of CPUs, my guess was that this resulted > in starvation for the kernel threads, is my guess plausible or do kernel > threads get preference for scheduling.
The short answer: 'man 7 sched' The long answer: The first question is, of course: "Did you see any actual evidence of kernel threads being starved?" In general, CPU-bound execution threads get lower priority than threads that are I/O bound or otherwise bursty in behavior, so kernel threads (which almost never go CPU bound) end up getting scheduled before cpu-bound threads. However, it *is* possible to shoot yourself in the foot by setting artificially high priorities on CPU-bound processes and/or setting processor affinity or fully tickless kernels to end up accidentally starving some kernel threads. _______________________________________________ Kernelnewbies mailing list [email protected] https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
