> The estimated time to completion is based on the benchmark scores.
> Have you checked if your "identical" systems have identical scores?
They are close. One is a P4 2.4 GHz, the other a dual Xeon 2.4 GHz (hyperthreading enabled). For the dual Xeon, it shows the benchmark scores per logical CPU and they seem to more or less match the P4 benchmarks.
The Xeon is doing 4 units in parallel, each with an estimated time of 1600 hours, the elapsed time does change with real time (as does the cpu time spent on the different processes). However, when I move the work from the Xeon to the other computer, it only runs one unit (which is logical) but gives the same time estimate. The Xeon has been running for 160 hours, and the graphs are at 10%, so it is not only the estimate that is wrong: the unit does take longer to work on.
> There is a known bug when benchmarking multiple CPU (or HT) systems causing
> the benchmark scores to fluctuate greatly. If your computer is HT then this
> might be the cause.
Yes, but that wouldn't explain why the calculations also take longer...? Would it?