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
| ||
|
Date: Mon, 04 Jul 2011 08:45:27 +0800 From: "Alex,Shi" <alex.shi@...el.com> To: Nikhil Rao <ncrao@...gle.com> Cc: Ming Lei <tom.leiming@...il.com>, "peterz@...radead.org" <peterz@...radead.org>, "mingo@...e.hu" <mingo@...e.hu>, "Chen, Tim C" <tim.c.chen@...el.com>, "Li, Shaohua" <shaohua.li@...el.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: power increase issue on light load On Sat, 2011-07-02 at 02:00 +0800, Nikhil Rao wrote: > Hi Ming, > > On Thu, Jun 30, 2011 at 10:44 PM, Ming Lei <tom.leiming@...il.com> wrote: > > Hi, > > > > On Thu, Jun 23, 2011 at 10:43 AM, Alex,Shi <alex.shi@...el.com> wrote: > >> commit c8b281161dfa4bb5d5be63fb036ce19347b88c63 causes light load > >> benchmark use more than 10% system power on platform NHM-EP and laptop > >> Thinkpad T410 etc. The benchmarks are specpower and bltk office. > >> > >> I tried to track this issue, but only find deep C sate time reduced > >> much, about from 90% to 30~40%, the C0 or C1 state increase much on > >> different machines. > >> > >> Powertop just hints RES interrupts has a bit more. but when I try "perf > >> probe native_smp_send_reschedule". I didn't find much. > > > > I see the problem on -rc5 in my T410 too, the fan has been ringing always > > and powertop reports "Wakeups-from-idle per second : 508.6". > > > > Thanks for reporting this issue. Looks like the increased resolution > has a negative impact on power savings balance. I'm looking into this > issue based on Alex's data, but If you can give a trace or something > that I can work with it will be really helpful. Ops, I didn't aware that my evolution didn't send out the trace code to you, until this e-mail. I just resend them and it should be OK this time. Please check it and give me a response. Thanks! > > -Thanks, > Nikhil -- 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