Well, there is indeed a difference - and it is significant. > On Mar 24, 2022, at 12:32 PM, David Henkemeyer <david.henkeme...@gmail.com> > wrote: > > Assuming -N is 1 (meaning, this job needs only one node), then is there a > difference between any of these 3 flag combinations: > > -n 64 (leaving cpus-per-task to be the default of 1)
Will launch 64 instances of your application, each bound to a single cpu > --cpus-per-task 64 (leaving -n to be the default of 1) Will run ONE instance of your application (no binding if the node has 64 cpus - otherwise, the proc will be bound to 64 cpu's) > --cpus-per-task 32 -n 2 Will run TWO instances of your application, each bound to 32 cpu's > > As far as I can tell, there is no functional difference. But if there is even > a subtle difference, I would love to know what it is! > > Thanks > David > -- > Sent from Gmail Mobile
