My Usage My Usage This page contains a record of your usage of ARCHIE in core hours*. Note, this only includes jobs completed by 3.00am. [job_data] *How Core-Hours are Calculated Core hours are calculated using the formula: [(End Time - Start Time) * number-of-slots * number-of-cores-per-slot]/3600 Number of slots: this is the number of slots requested in a parallel environment e.g. #$ -pe mpi-verbose 2 (2 slots) Number of cores per slot: this varies depending on the parallel environment / queue used Queue Parallel Environment Cores per Slot parallel.q mpi / mpi-verbose 12* gpu.q / gpu-dev.q gpu / gpu-verbose 12* serial.q – 1 smp.q smp / smp-verbose 1 * For parallel.q / gpu.q /gpu-dev.q we include all 12 cores on each requested node in the core-hour calculation. This is because any idle cores are not available to other users.