Mark Burton wrote:
Changed default number of threads to be 1. If you specify --max-jobs without a value, you get one thread per core. --max-jobs=N means use N threads.
With regard to comparing the output with known good maps to see if the parallel processing is corrupting anything, one problem is that the files contain timestamps. I have test code that zeros the time stamps and have been able to compare the output from different runs.
I have just run this against todays great_britain.osm and using --max-jobs I had a runtime of 397s and without was 676s. This is on my dual core laptop with 4GB RAM. The 2 files created had exactly the same number of bytes and in my admittedly very brief and not overly scientific testing intertile routing seems to be the same for both. I haven't dug any deeper than that though as I'm meant to be working :) Paul