On 10 Aug 2017, at 12:29, Maitraya Bhattacharyya <maitraya.linux@gmail.com> wrote:

Hi Ian,

I noticed that there is a CESSI-BEAST.ini. I have 24 cores on my machine, I did the following changes,

ppn             = 256
max-num-threads = 256
num-threads     = 24
nodes           = 1

Hi,

The terminology in simfactory is confusing, because it is quite old, and the meaning of some commonly-used terms has changed. The full details of what everything means are at http://simfactory.org/info/documentation/userguide/processterminology.html.

Do you really have 24 physical cores, or do you have a processor with 24 hyperthreads on 12 cores? If Linux reports 24 cores, then if you have hyperthreading, you likely only have 12 cores.

Can you post the output of "lscpu"?