Count CPU cores, start up sims in parallel. 🔼

Should speed up grid start up.

Divide by 2 coz typical servers have 2 * actual cores reported.  We only want to tie up a core per sim.

Divide by 2 again so there's cores left available for other things.  Or maybe just - 1?

Experiment in VMs.

reported=2021-03-19 04:58:40

reporter=onefang

priority=none

category=Feature

severity=feature

resolution=fixed