[mkgmap-dev] [PATCH v5] make maps in parallel

Wed May 13 14:20:24 BST 2009

On Tue, May 12, 2009 at 9:57 AM, Mark Burton <markb at ordern.com> wrote:
>
> Here's a better fix than last night's effort for the problem where the
> mapname and description for each job were getting clobbered due to the
> way that the command args are processed. Each job now gets a "snapshot"
> of the command args so it doesn't matter if they subsequently get
> changed.

Hm... I tested the v5 patch on a 2 core machine (MS Vista).

Although the processing time appeared to be greatly increased :-),
many files were skipped :-(.

I attempted to compile a map of Germany split into 37 tiles, numbered
63240001.osm.gz to 63240037.osm.gz.

- mkgmap only created 21 img files, skipping 63240001.img and
63240017.img - 63240026.img and 63240032.img - 63240036.img

The command line looked like this:

  java -Xmx1536M -jar \mkgmap.jar [options] 63*.osm.gz

Does this help?

Cheers.