Chain has infinite run time?

[keelder]

Describe what you would like to do
I am attempting to run through the MCMC Introduction tutorial, but the chain never actually finishes running to produce data. I am trying to find out what needs to be changed in the code to shorten the run time.

What I've tried
I've tried debugging using a number of methods, but I cannot figure out why run_mcmc cannot complete or where it is stuck.

[qyx268]

Thanks @keelder for reporting this bug. I can confirm this is also happening to me by following https://21cmmc.readthedocs.io/en/latest/tutorials/mcmc_intro.html#Running-MCMC. In fact, run_mcmc stopped (i.e. cpu percentages reach 0). I suspect this has to do with simulating the mock PS. We will look into this soon.

Meanwhile, a quick solution is to set simulate=False after having produced the simple_mcmc_data_*.npz in the data folder. @keelder, please note that len(params) * walkersRatio / threadCount>1 and len(params) * walkersRatio % threadCount=0, so if you are following the tutorial, please set e.g. threadCount=3 or walkersRatio=6.