ULE patch, call for testers
lists at eitanadler.com
Fri Nov 2 20:36:48 UTC 2012
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.
> 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. */
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