Will,
Thank you very much! This is a big help.
You should also note Memphis, in the developer activity. It gives a
better reflection of actual memory used by applications than simple ps,
top, and the like.
Best regards, and thanks!
- Jim
On Wed, 2007-03-28 at 10:30 -0400, William Cohen wrote:
> Hi All,
>
> The OLPC is a very resource limited machine. Decreasing resource use on the
> OLPC
> translates into very tangible benefits such as more space on machine for user
> content, better system responsiveness, better better battery life. I have
> been
> adding material to http://wiki.laptop.org on the experience of using tools on
> OLPC machine and software when possible. There are two broad categories been
> looking at: memory use and processor use.
>
> Processor Utilization tools:
> -sysprof (haven't personally tried this)
> -OProfile (http://wiki.laptop.org/go/Oprofile_setup)
> -Python profiling (http://wiki.laptop.org/go/Python_profiling)
> -SystemTap (http://wiki.laptop.org/go/Systemtap)
> (http://www.mail-archive.com/[email protected]/msg03436.html)
> -Valgrind's callgrind tool to get call graph information
> (http://www.valgrind.org/)
>
> Storage Utilization
> -Valgrind's massif tool to examine memory allocation
> (http://www.valgrind.org/)
> -reducing size of code (http://lovesunix.net/spaceoptimization.pdf)
> -Improving shared libraries
> (http://people.redhat.com/drepper/dsohowto.pdf)
> -scripts to analyze file system and process memory use.
> (http://people.redhat.com/berrange/olpc/image/)
> -scripts to analyze process memory map
> (http://people.redhat.com/berrange/olpc/performance/)
>
> Looking through the wiki pages there currently wasn't a nice clearing house
> of
> this type of information so that people can quickly get up to speed on how
> they
> might tune code on the machine. I decided to add one:
>
> http://wiki.laptop.org/go/Performance_tuning
>
> Any commments or additions to it would be appreciated.
>
> -Will
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--
Jim Gettys
One Laptop Per Child
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