On Thu, 2012-09-27 at 11:19 -0700, Linus Torvalds wrote: > On Thu, Sep 27, 2012 at 11:05 AM, Borislav Petkov <b...@alien8.de> wrote: > > On Thu, Sep 27, 2012 at 10:44:26AM -0700, Linus Torvalds wrote: > >> Or could we just improve the heuristics. What happens if the > >> scheduling granularity is increased, for example? It's set to 1ms > >> right now, with a logarithmic scaling by number of cpus. > > > > /proc/sys/kernel/sched_wakeup_granularity_ns=10000000 (10ms) > > ------------------------------------------------------ > > tps = 4994.730809 (including connections establishing) > > tps = 5000.260764 (excluding connections establishing) > > > > A bit better over the default NO_WAKEUP_PREEMPTION setting. > > Ok, so this gives us something possible to actually play with. > > For example, maybe SCHED_TUNABLESCALING_LINEAR is more appropriate > than SCHED_TUNABLESCALING_LOG. At least for WAKEUP_PREEMPTION. Hmm?
Don't forget to run the desktop interactivity benchmarks after you're done wriggling with this knob... wakeup preemption is important for most those. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
