Quoting from there:There's some relevant discussion here (an old thread, but still pretty interesting) that I found at one point when I was googling this stuff:
SCHED_ULE should not be the default
fa.freebsd.stable.narkive.com
If I recall
correctly the most loud supporters of the notion that SCHED_BSD is faster
than SCHED_ULE are using more threads than there are cores, causing CPU core
contention and more importantly unevenly distributed runtimes among threads,
resulting in suboptimal execution times for their programs.
Okay, so the really serious issue is indeed the one that I did accidentially run into and consequentially have fixed.
Cool, the number of known and discussed issues where only I have a working fix (and nobody wants it) is increasing (IPv6 inflight refragmentation would be the latest addition to that list).