[sugar] Memory pressure (Re: Signed candidate-765 and gg-765-2 builds available for testing.)

[Eduardo H. Silva]

Don't forget cpu pressure, I've had freezes which need a forcefull
shutdown because of it. One example is installing Scratch from the
wiki. When it reaches the point of unzipping, it makes the system
slow. If you happen to have some activity also doing something
intensive (like a Browse instance rendering a complicated webpage) the
UI freezes. Sometimes waiting works, other times it doesn't.

Eduardo

2008/9/27 Marco Pesenti Gritti <mpgritti at gmail.com>:
> Since everyone major concern is memory pressure especially with
> Browse, I did some comparison tests with Update.1. The results are
> somewhat surprising:
>
> os711 + g1g1 activity pack
>
> Startup: free 127 mb
> Min Browse: free 91 mb
> Max Browse: free 61 mb
>
> gg-765-2
>
> Startup: free 129 mb
> Min Browse: free 91 mb
> Max Browse: free 63 mb
>
> Notes:
>
> * I have not repeated the tests yet (I intend to do so), so there is
> the possibility of measurement errors. From my experience so far I'd
> say +/- 5 mb.
> * Free memory is measured with free, after having dropped the caches
> with echo 3 >/proc/sys/vm/drop_caches
> * Min Browse is free memory just after having started browse, no navigation.
> * Max Browse is the maximum amount of memory I could get Browse to use
> while navigating randomly inside wikipedia (starting from Moon).
> Browse memory usage normally grows up quickly when you load the first
> few pages and then it stabilizes and does not grow anymore.
> * I tested on clean copy-nand installations of both images, without any reboot.
>
> Marco
> _______________________________________________
> Sugar mailing list
> Sugar at lists.laptop.org
> http://lists.laptop.org/listinfo/sugar
>