From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1SEfur-0002Uo-8b for garchives@archives.gentoo.org; Mon, 02 Apr 2012 11:59:21 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 327ACE09BE; Mon, 2 Apr 2012 11:59:04 +0000 (UTC) Received: from svr-us4.tirtonadi.com (svr-us4.tirtonadi.com [69.65.43.212]) by pigeon.gentoo.org (Postfix) with ESMTP id 02F6AE0C74 for ; Mon, 2 Apr 2012 11:57:28 +0000 (UTC) Received: from mail-vx0-f181.google.com ([209.85.220.181]) by svr-us4.tirtonadi.com with esmtpsa (TLSv1:RC4-SHA:128) (Exim 4.69) (envelope-from ) id 1SEft3-001cOv-Dy for gentoo-user@lists.gentoo.org; Mon, 02 Apr 2012 18:57:29 +0700 Received: by vcge1 with SMTP id e1so1937022vcg.40 for ; Mon, 02 Apr 2012 04:57:25 -0700 (PDT) Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Received: by 10.52.240.171 with SMTP id wb11mr3087230vdc.106.1333367845265; Mon, 02 Apr 2012 04:57:25 -0700 (PDT) Received: by 10.220.190.12 with HTTP; Mon, 2 Apr 2012 04:57:25 -0700 (PDT) Received: by 10.220.190.12 with HTTP; Mon, 2 Apr 2012 04:57:25 -0700 (PDT) In-Reply-To: <20120402115559.2b723512@gmail.com> References: <4F786E9A.60404@gmail.com> <20120402115559.2b723512@gmail.com> Date: Mon, 2 Apr 2012 18:57:25 +0700 Message-ID: Subject: Re: [gentoo-user] Tips for saving power needed... From: Pandu Poluan To: gentoo-user@lists.gentoo.org Cc: mr.jarry@gmail.com Content-Type: multipart/alternative; boundary=20cf307ca3dcc5a27004bcb0e465 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - svr-us4.tirtonadi.com X-AntiAbuse: Original Domain - lists.gentoo.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - poluan.info X-Archives-Salt: 6b3b643c-28fe-476e-bce3-7ba4be18a346 X-Archives-Hash: 493c765ffe6f5ae3b4b2c6bd4a342f8a --20cf307ca3dcc5a27004bcb0e465 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Apr 2, 2012 5:00 PM, "Robert David" wrote: > > Hi, > > maybe write your hw configuration first. Eg: CPUs, graphic cards, HDDs > (size, speed, type) and others. > > Also provide lspci output and /proc/cpuinfo. > > Then this is a server, maybe with more than one GB nic. If you dont use > spare nics disable them in bios. Do the same with other unneeded stuff. > > If you can access your server and replace cards, remove everything you > dont need. Do not lower fans or dont play with cpu voltage. If you want > to run this server 24/7 it can cause serious problems. It will not save > you much power. Paradoxly this could lead to higher power usage in > some cases, because of hotter devices. > > Remove spare memory cards, if you dont need much memory, etc. > > Robert. > > V Sun, 01 Apr 2012 17:04:58 +0200 > Jarry naps=C3=A1no: > > > Hi, > > > > admin of a colo-center keeps complaining my server is going > > a little over power-limit (which they have set as ~120W per > > 24h/avg, while my server needs ~130-135W). So I need to find > > a way to save at least those 15W, or I will be moved to > > higher tarif (which means higher costs for server-housing). > > > > Before going hard(ware) way, I would like to try first > > all possible software solutions. What I tried up to now is > > cpufreqd, CONFIG_NO_HZ=3Dy, and spindown. In addition to that > > I adjusted fan-speeds to a little lower values and turned > > off some unneeded peripherials (in bios). > > > > Is there anything else I could do? Any tips would be greatly > > welcomed... > > > > Jarry > > > > I'd rather have *more* RAM than causing unnecessary swaps. Try using a smaller swapfile to reduce swap tendencies. You can always push a larger swapfile into service when needed. There's also a kernel knob to set 'swappiness', but I forget what exactly. Try 'sysctl -a | grep swap' Rgds, --20cf307ca3dcc5a27004bcb0e465 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Apr 2, 2012 5:00 PM, "Robert David" <robert.david.public@gmail.com> wrote:
>
> Hi,
>
> maybe write your hw configuration first. Eg: CPUs, graphic cards, HDDs=
> (size, speed, type) and others.
>
> Also provide lspci output and /proc/cpuinfo.
>
> Then this is a server, maybe with more than one GB nic. If you dont us= e
> spare nics disable them in bios. Do the same with other unneeded stuff= .
>
> If you can access your server and replace cards, remove everything you=
> dont need. Do not lower fans or dont play with cpu voltage. If you wan= t
> to run this server 24/7 it can cause serious problems. It will not sav= e
> you much power. Paradoxly this could lead to higher power usage in
> some cases, because of hotter devices.
>
> Remove spare memory cards, if you dont need much memory, etc.
>
> Robert.
>
> V Sun, 01 Apr 2012 17:04:58 +0200
> Jarry <mr.jarry@gmail.com= > naps=C3=A1no:
>
> > Hi,
> >
> > admin of a colo-center keeps complaining my server is going
> > a little over power-limit (which they have set as ~120W per
> > 24h/avg, while my server needs ~130-135W). So I need to find
> > a way to save at least those 15W, or I will be moved to
> > higher tarif (which means higher costs for server-housing).
> >
> > Before going hard(ware) way, I would like to try first
> > all possible software solutions. What I tried up to now is
> > cpufreqd, CONFIG_NO_HZ=3Dy, and spindown. In addition to that
> > I adjusted fan-speeds to a little lower values and turned
> > off some unneeded peripherials (in bios).
> >
> > Is there anything else I could do? Any tips would be greatly
> > welcomed...
> >
> > Jarry
> >
>
>

I'd rather have *more* RAM than causing unnecessary swaps.

Try using a smaller swapfile to reduce swap tendencies. You can always p= ush a larger swapfile into service when needed.

There's also a kernel knob to set 'swappiness', but I forget= what exactly. Try 'sysctl -a | grep swap'

Rgds,

--20cf307ca3dcc5a27004bcb0e465--