[Olsr-announce] olsrd-0.5.1 released

[Andreas Tønnesen]

FYI,

The release was made available on http://www.olsr.org
a couple of days ago, but the mail did not make it to the
lists due to some server miss configurations.

- Andreas

Bernd Petrovitsch wrote:
> I just released olsrd-0.5.1. A .tar.gz and a .tar.bz2 can be found for
> now on http://bernd.petrovitsch.priv.at/olsr-ng/ until they find their
> way to http://www.olsr.org/.
>
> To quote from the changelog:
> ----  snip  ----
> MISC
> Upgrade to olsr-bmf 1.5 from Erik Tromp <(spam-protected)>
>
> latitude/longitude support is now in the nameservice plugin done by
> Sven-Ola Tuecke <(spam-protected)>
>
> added the spf refactoring patch from  Hannes Gredler <(spam-protected)>
> which saves a noteworthy amount of CPU time. To quite him:
> ----  snip  ----
> 1. use of an AVL tree as a min-heap implementation
>
>    as a means for efficient sorting.
>    (the etx metric is used as the key in the candidate tree)
>
> 2. next-hop propagation
>
>    rather than tracking the previous node in olsr_relax()
>    i have changed that model and pre-populate all one-hop neighbors
>    with their own IP adress as 'next-hop' and pull that
>    pointer up once new paths are explored.
>
>    as a result no walker for counting hops and extracting next-hops
>    is required - it turns out at this is slighly more efficient
>    than the existing behaviour (even with the cache applied).
> ----  snip  ----
>
> CLEANUPS
> * moved a only locally needed hack from "union olsr_ip_addr" into the
> only place
>   where it is needed in hashing.c
> ----  snip  ----
>
> And to emphasize the probably biggest step forward in this release
> (apart from the various smaller patches and fixes - which are important
> as well), the SPF refactoring saves quite a lot of CPU time by
> implementing efficient algorithms - all kudos go to Hannes Gredler who
> implemented it. This was supported by Thomas Lopatic
> extending/completing the already present in-tree AVL "mini-library".
>
> Since the spf-refactoring patch was officially in the FreiFunkFirmware
> and several other Linux based nodes, it runs obviously on "Linux".
> I compiled and tested it on WinXP and it seems there as an even bigger
> win (I didn't measure it seriously but it seems to me that initially the
> nodes are much faster detected and routes are much faster installed).
> Since it doesn't touch any OS specific parts, I expect it to run on
> other OSes (*BSD, MacOS, ...) too. Testing (everywhere) and feedback is
> of course always appreciated.
>
> 	Bernd
>