[maemo-users] Dealing with N900 responsiveness (or lack of thereof)

From: Dawid Lorenz adl at adl.pl
Date: Tue Feb 23 21:05:35 EET 2010
This is a follow-up from bugzilla entry
https://bugs.maemo.org/show_bug.cgi?id=8723#c35 -- as I think it goes beyond
a scope that issue itself.

Eero Tamminen <eero.tamminen at nokia.com> wrote:

> Anything large (say e.g. Python) waking up on the background will also be an
> issue.  You can check top (or strace) now and then to see whether something
> does stuff on the background (even 1%) although you haven't specifically
> requested it to do anything.  If it is, please file a bug.
> I've had a look at top over ssh connection and seen /usr/bin/pulseaudio
--system --high-priority constantly floating around 1-3% of CPU time.
Needless to say, device was lying on the desk next to me, doing nothing, not
to mention anything media-related. I did killall media-player but that
didn't help and pulseaudio was still working out.

However I've been listening to music earlier in the morning, took couple of
calls etx. Then later in the day I've opened a camera to take a picture,
which threw weird "Another application is using audio" message at me few
times (while no app that I was aware of was running in the background).

I will look closer to this issue and file appropriate bugzilla entry when I
get some concrete observations.

> Closing all browser windows occasionally is also a good idea.  Www-pages &
> Flashplayer can cause Browser to use huge amounts of memory & the dynamic
> nature of that memory usage can make browser memory very fragmented.  Certain
> kind of pages (if I've understood correctly, with images animated from JS) can
> still cause it to wake up in the background which causes browser to be swapped
> in, and then out when the foreground app wants to do something (this issue is
> even worse in upstream Mozilla/Fennec).  We're trying to get that fixed for
> next release, but it's possible that fix isn't ready in time for that one.
Browser is serious resource hog. I've noticed that closing all windows
sometimes doesn't help either. As I said earlier in this thread, I was
trying to restart tablet-browser-daemon, but it didn't seem to help much.
Ie. browserd released memory at first, but almost instantly started
regaining "weight" to the point where it roughly was before restart.

Again, I've set swappiness value to 60 yesterday, my N900 has 1d7h of uptime
so far and I am monitoring its behaviour much closer than before. So far so
good, but as I said initially - weird things start happening since approx.
second/third full day of uptime.

Dawid 'evad' Lorenz * http://adl.pl

null://real men never use Gmail
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