[Bug 228076] [sched_ule] Not stealing process from loaded CPU
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Wed May 9 20:01:00 UTC 2018
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=228076
--- Comment #8 from Mit Matelske <mit at pt.net> ---
Sorry for the delay!
I tried the patch out and sched_balance_group now runs but the I can still get
a process stuck in the RUN state on a busy CPU. FWIW, it doesn't seem like
that mechanism ever moves processes. All my calls to tdq_move comes from the
tdq_idled loop.
I'm debugging why the process doesn't get moved now. Weird thing is other
processes are successfully getting moved from the busy CPUs from the tdq_idled
loop. Just not the stuck process.
Don't know if this helps, but it seems like if I start another process,
something triggers and it will move the stuck process and everything will run
fine for awhile. Any clues from that?
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