Charm++ parallel programming system

[Tom Quinn <trq AT astro.washington.edu>]

When using hardware threads, it seems to be beneficial to have adjacent 
charm PE numbers on the same physical core, but the layout of the cores on 
Intel platforms puts adjacent core numbers on different physical cores. 
Therefore, I'd like a "+pemap" that does the following: (e.g. on a chip 
with 68 physical cores and 4 HW threads/core)
PE 0 : core 0
PE 1 : core 68
PE 2 : core 136
PE 3: core 204
PE 4: core 1
PE 5: core 69
PE 6: core 137
PE 7: core 205
...
PE 272 : core 0  (on node 1)
PE 273: core 68  (on node 1)
...

I tried the following: +pemap 0-271+68+136+204
which works for one node, but on the 2nd node it attempts to place PEs on 
cores greater than 271, which causes an abort.

Thanks,

Tom