[dundee] laptop mode power saving

[Nicholas Walker]

remove those bloated UI's and run openbox instead :D

On Sun, Oct 18, 2009 at 4:44 PM, Lee Hughes <toxicnaan at yahoo.co.uk> wrote:

> hehe.. i suppose i could, just trying to get extended battery life. tee
> hee..
>
> it's seems to be working a little better now.... looks like gnome is full a
> fsync's
>
> fsync's seem to wake my system up!!!
>
> how do i get rid of them.
>
>
> --- On *Sun, 18/10/09, Jennifer higgins <
> sauntering.with.scissors at gmail.com>* wrote:
>
>
> From: Jennifer higgins <sauntering.with.scissors at gmail.com>
> Subject: Re: [dundee] laptop mode power saving
> To: "Tayside Linux User Group" <dundee at lists.lug.org.uk>
> Date: Sunday, 18 October, 2009, 3:20 PM
>
>
> oh just power the laptop down you big geek ;)
>
> 2009/10/18 Lee Hughes <toxicnaan at yahoo.co.uk<http://mc/compose?to=toxicnaan@yahoo.co.uk>
> >
>
>>  hmm. well it seems that firefox writes one more file which is not to it's
>> cache or
>> it's profile...it's...
>>
>> lsof | grep firefox | grep tmp
>>
>> firefox   27357       user   72u      REG        8,1        0  6177091
>> /var/tmp/etilqs_2SWFrJKOPJgPeet (deleted)
>>
>> etilqs seemed to be sqlite backwards?
>>
>> bizzare.... any idea's what that is or how to relocated it to my ramdisk?
>>
>> Cheers,
>> Lee
>>
>>
>>
>> --- On *Sun, 18/10/09, Lee Hughes <toxicnaan at yahoo.co.uk<http://mc/compose?to=toxicnaan@yahoo.co.uk>
>> >* wrote:
>>
>>
>> From: Lee Hughes <toxicnaan at yahoo.co.uk<http://mc/compose?to=toxicnaan@yahoo.co.uk>
>> >
>> Subject: [dundee] laptop mode power saving
>> To: "Tayside Linux User Group" <dundee at lists.lug.org.uk<http://mc/compose?to=dundee@lists.lug.org.uk>
>> >
>> Date: Sunday, 18 October, 2009, 3:06 PM
>>
>>
>> Right,
>>
>> has any got laptop mode working successfully , i'm trying to get my hard
>> disk to spin down as long as possible,
>>
>> i've been using a combination of lm-profile, iotop -o -d 10 -b
>>
>> now,  i've nailed fire fox from fsyncing all the time, that's improved
>> things some what,
>>
>> http://www.dslreports.com/forum/r23159573-Re-Make-Firefox-3x-more-responsive-with-a-simple-trick
>>
>> it's also faster too boot!
>>
>> however,  my hard disk sleeps for about 2mins, i've zapped syslog and klog
>> for testing,
>> so there should be nothing on the system that should need to wake the disk
>> for writing.
>>
>> however, kkjournald is waking the disk up, (presumable to write the
>> journal to disk)
>> but the file system is mounted with
>>
>> /dev/sda1 on / type ext3 (rw,relatime,errors=remount-ro,commit=600)
>>
>> so, it should only commit every 10 mins, or when we run low on memory.
>>
>>   PID USER      DISK READ  DISK WRITE   SWAPIN    IO    COMMAND
>>   807 root           0 B/s    5.54 K/s  0.00 %  0.00 % [kjournald]
>>  3911 user           0 B/s    0.40 K/s  0.00 %  0.00 % gnome-power-manager
>>
>>
>> oh,actually i wonder  if it's the gnome power manager, how ironic.. looks
>> like
>> the gnome power manager might be forcing a sync...
>>
>> yes, it seems that a lot of gnome componets are doing a fsync, thus waking
>> my disk
>> up.. :-(
>>
>> all i want is, while i'm not reading new data(i.e uncached data from disk)
>> , i want
>> applications to write (but delay that write until I say, or a timeout
>> value).
>>
>> i think over use of the fsync call may be answer, but i think there's more
>> to it than that.
>>
>> my harddrives now been dormant for 10mins....  spin down nirvarna has been
>> reached.
>>
>> looks like killing the gnome power meter has stopped the spin ups... now
>> that's
>> ironic..  any replacements? or shall i go and hack it.
>>
>> i wonder if this would do ssd's good too.
>>
>> thoughts?
>>
>> Cheers,
>>
>> Lee
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
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-- 


Nick Walker
Vice President : The Linux Society
UAD Ethical Hacker
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