Multiple threads not working!

[jlehtoma]

Multiple threads (more than full hardware threads used by default) does not work currently. Consecutive runs using exactly the same setups produces different results. Until fixed, do not use --use-threads=N.

[jlehtoma]

Faulty behavior is confirmed using ESMK data both for CAZ and ABF. Additional analysis features (e.g. Info-Gap uncertainty) do not matter. So far tested with 1, 2, 8 and 34 threads on our server setup (Ubuntu 12.04 LTS x64). Except for --use-threads=1 the results for the same setup are different for consecutive runs. While using --use-threads=1 produces the same results when run consecutively, the results still differ from the default (no --use-threads defined). This is most probably a bug with delegating and/or aggregating the calculations of individual features.

[underbluewaters]

Is this still the case? I was seeing a 1.6x performance boost using 8 cores vs 1.

[jlehtoma]

@underbluewaters AFAIK, this is still the case. There may be a performance boost, but there is no guarantee that the results are correct.