linux-kernel - Re: SCHED_DEADLINE cpudeadline.{h,c} fixup

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 19 Aug 2016 14:58:19 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Tommaso Cucinotta <tommaso.cucinotta@...up.it>
Cc:     Luca Abeni <luca.abeni@...tn.it>,
        Juri Lelli <juri.lelli@...il.com>,
        Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        linux-dl@...is.sssup.it
Subject: Re: SCHED_DEADLINE cpudeadline.{h,c} fixup

On Sun, Aug 14, 2016 at 04:27:05PM +0200, Tommaso Cucinotta wrote:
> Hi,
> 
> this is a rework of the cpudeadline bugfix and speed-up patch-set, that
> integrates all comments received so far from Luca, Juri and Peter.
> 
> Compared with the previous post, here:
> -) I'm keeping out the minimally invasive bugfix, as it's already been
>    merged in tip/sched/core
> -) I moved some little code refactory around change_key_dl() out of the
>   (now) 2nd patch, to the 1st one. Now the 2nd (speed-up) patch just
>   changes the heapify_up/down() functions
> -) I rebased on top of commit f0b22e39
> -) I repeated an extensive set of tests through the framework published
>    separately at: https://github.com/tomcucinotta/cpudl-bench
>    repeating new no-behavior-change tests, new heap-consistency tests,
>    and new a/b benchmarks (I'm working on a new i5 laptop now), results at:
>      https://github.com/tomcucinotta/cpudl-bench/blob/master/cpudl-100000.pdf
>    highlighting up to a 14% speed-up when averaging over 100K ops. See the
>    enclosed README in that repo for more info.

Thanks!