Re: [RFC PATCH 3/4] Make deadline max-heap faster avoiding real swaps on heapify ops.

[Peter Zijlstra]

On Tue, Jul 19, 2016 at 11:44:52AM +0200, Tommaso Cucinotta wrote:
> This change achieves up to 10% of speed-up for cpudl_set() calls, as
> measured with a andomly generated workload of 1K,10K,100K random heap
> insertions and deletions (75% cpudl_set() calls with is_valid=1 and
> 25% with is_valid=0), and randomly generated cpu IDs, with up to 256
> CPUs, as measured on an Intel Core2 Duo.

Changelog fails to explain _what_ the change is.

Some details on the change in implementation and why this is faster
would be good.