[dundee] laptop mode power saving

[Jennifer higgins]

oh just power the laptop down you big geek ;)

2009/10/18 Lee Hughes <toxicnaan at 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>* wrote:
>
>
> From: Lee Hughes <toxicnaan at yahoo.co.uk>
> Subject: [dundee] laptop mode power saving
> To: "Tayside Linux User Group" <dundee at 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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