[Pw_forum] Use of pool

[Huiqun Zhou]

Dear list users:

I happened to test duration times of calculating the system I'm 
investigating against number of pools used. There are totally
36 k points. But the results surprised me quite a lot. 

no pool:  6m21.02s CPU time,     6m45.88s wall time
2 pools:  7m19.39s CPU time,     7m38.99s wall time
4 pools: 11m59.09s CPU time,    12m14.66s wall time
8 pools: 21m28.77s CPU time,    21m38.71s wall time

The machine I'm using is an AMD box with 2 quad core shanghai.

Is my understanding of usage of pool wrong?

Huiqun Zhou
@Nanjing University, China