On 2 November 2012 14:26, Jeff Roberson <jroberson_at_jroberson.net> wrote: > I have a small patch to the ULE scheduler that makes a fairly large change > to the way timeshare threads are handled. > > http://people.freebsd.org/~jeff/schedslice.diff > > Previously ULE used a fixed slice size for all timeshare threads. Now it > scales the slice size down based on load. This should reduce latency for > timeshare threads as load increases. It is important to note that this does > not impact interactive threads. But when a thread transitions to > interactive from timeshare it should see some improvement. This happens > when something like Xorg chews up a lot of CPU. > > If anyone has perf tests they'd like to run please report back. I have done > a handful of validation. does it make sense to make these sysctls? +#define SCHED_SLICE_DEFAULT_DIVISOR 10 /* 100 ms. */ +#define SCHED_SLICE_MIN_DIVISOR 4 /* DEFAULT/MIN = 25 ms. */ -- Eitan AdlerReceived on Fri Nov 02 2012 - 19:36:48 UTC
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