Log File Contents - N-BodyShop/changa GitHub Wiki

As well as providing diagnostics on how the simulation is progressing, the log file gives some provenence information. In particular, the first few lines of the log file give the version of ChaNGa, the command line that was used, the number of processors used, the date it was compiled and the compile options. Following that, all the values of all the run parameters are printed, one per line. After all the parameters are printed, one line is printed every iLogInterval timesteps. The line contains the simulation time, the redshift (if cosmological) various measures of energy, the total angular momentum, and the wallclock time of the last timestep. Note that the first line will contain the wallclock time of the first force calculation, while subsequent lines have the wallclock time of a big step.