[GraphHopper] Is the import really multi-thread?

[John Zhao]

Hi,

I put parameter:
.put("osmreader.workerThreads", Math.max(2,
Runtime.getRuntime().availableProcessors()));

My CPU has 32 cores.
And I saw the log as below. It looks like this worked as we thought.
But I have a few questions:
1. what is the pool 1 and pool 2?
2. what the load of machine is pretty low, like 2-5. I thought it should be
pretty high.
3. basically, this step is just convert pbf file to internal osm entity
object?

For Europe download from geofabrik, this step take 50 minutes.

22:33:23.967 [pool-1-thread-14] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
22:33:23.968 [pool-1-thread-6] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
22:33:23.968 [pool-1-thread-23] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
22:33:23.969 [pool-1-thread-5] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
22:33:23.969 [pool-1-thread-11] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
22:33:23.969 [pool-1-thread-12] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
22:33:23.970 [pool-1-thread-22] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
22:33:23.970 [pool-1-thread-2] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
22:33:23.970 [pool-1-thread-21] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
22:33:23.971 [pool-1-thread-25] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.

23:19:38.130 [pool-2-thread-5] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
23:19:38.142 [pool-2-thread-21] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
23:19:38.153 [pool-2-thread-13] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
23:19:38.164 [pool-2-thread-31] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
23:19:38.176 [pool-2-thread-12] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
23:19:38.186 [pool-2-thread-24] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
23:19:38.193 [pool-2-thread-4] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
23:19:38.203 [pool-2-thread-32] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
23:19:38.209 [pool-2-thread-22] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
23:19:38.218 [pool-2-thread-19] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
23:19:38.226 [pool-2-thread-3] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
23:19:38.238 [pool-2-thread-27] DEBUG c.g.reader.pbf.PbfBlobDecoder -
Processing OSM primitive group.
*Best Regards,*
*ZhiQiang ZHAO*
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/graphhopper/attachments/20150702/0da77331/attachment.html>