Re: [PATCH RFC] select_idle_sibling experiments

[Matt Fleming]

On Sat, 09 Apr, at 01:30:34PM, Chris Mason wrote:
> 
> [ nohz throttling patch ]
> 
> I tested the nohz throttle two different ways, first with schbench's
> pipe simulation, it's easily 8% faster with messages bouncing between
> cpus.
> 
> In production it's hard to pick a single number because the benchmarks
> produce latency curves as the workload scales up in RPS.  The benefits
> range from 2-9% depending on the metric.  It's a nice win, and I'd love to
> see it go in.

Do we have any idea what the tradeoff is against power consumption for
throttling nohz?