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
| ||
|
Message-ID: <20130124132841.GB5302@gmail.com> Date: Thu, 24 Jan 2013 14:28:41 +0100 From: Ingo Molnar <mingo@...nel.org> To: Mike Galbraith <bitbucket@...ine.de> Cc: Rik van Riel <riel@...hat.com>, linux-kernel@...r.kernel.org, aquini@...hat.com, walken@...gle.com, eric.dumazet@...il.com, lwoodman@...hat.com, jeremy@...p.org, Jan Beulich <JBeulich@...ell.com>, knoel@...hat.com, chegu_vinod@...com, raghavendra.kt@...ux.vnet.ibm.com, mingo@...hat.com Subject: Re: [PATCH 0/5] x86,smp: make ticket spinlock proportional backoff w/ auto tuning * Mike Galbraith <bitbucket@...ine.de> wrote: > On Thu, 2013-01-10 at 10:31 -0500, Rik van Riel wrote: > > On 01/10/2013 10:19 AM, Mike Galbraith wrote: > > > On Tue, 2013-01-08 at 17:26 -0500, Rik van Riel wrote: > > > > > >> Please let me know if you manage to break this code in any way, > > >> so I can fix it... > > > > > > I didn't break it, but did let it play with rq->lock contention. Using > > > cyclictest -Smp99 -i 100 -d 0, with 3 rt tasks for pull_rt_task() to > > > pull around appears to have been a ~dead heat. > > > > Good to hear that the code seems to be robust. It seems to > > help prevent performance degradation in some workloads, and > > nobody seems to have found regressions yet. > > I had hoped for a bit of positive, but a wash isn't surprising > given the profile. I tried tbench too, didn't expect to see > anything at all there, and got that.. so both results are > positive in that respect. Ok, that's good. Rik, mind re-sending the latest series with all the acks and Reviewed-by's added? Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists