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Create Ntasks Flexibility Function #3

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Create Ntasks Flexibility Function #3

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ab57c0d
Create Ntasks Flexibility Function, Put in Apply All XML Changes
manishvenu Jan 16, 2025
96eb961
Ntask Flexibility
manishvenu Jan 17, 2025
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24 changes: 24 additions & 0 deletions visualCaseGen/custom_widget_types/case_creator.py
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Original file line number Diff line number Diff line change
Expand Up @@ -502,6 +502,30 @@ def _apply_all_xmlchanges(self, do_exec):
else:
assert lnd_grid_mode in [None, "", "Standard"], f"Unknown land grid mode: {lnd_grid_mode}"

# Set NTASKS_OCN based on grid size. e.g. NX * NY < max_pts_per_core
self._set_ntasks_ocean_based_on_grid(do_exec)

def _set_ntasks_ocean_based_on_grid(self, do_exec, min_points_per_core = 32, max_points_per_core = 800):
"""Set NTASKS OCN based on Grid Size"""

with self._out:
print(f"{COMMENT}Apply NTASK grid xml changes:{RESET}\n")
num_points = int(cvars["OCN_NX"].value) * int(cvars["OCN_NY"].value)
cores = 128 # Start from 128 which is the default 128 cores per node in derecho
iteration_amount = 16
pts_per_core = num_points/cores

while pts_per_core > max_points_per_core:
cores = cores + iteration_amount
pts_per_core = num_points/cores

while pts_per_core < min_points_per_core and cores > 1: # Don't let cores get below 1
cores = cores - iteration_amount
pts_per_core = num_points/cores

xmlchange("NTASKS_OCN",cores, do_exec, self._is_non_local(), self._out)
return

def _apply_user_nl_changes(self, model, var_val_pairs, do_exec, comment=None, log_title=True):
"""Apply changes to a given user_nl file."""
append_user_nl(model, var_val_pairs, do_exec, comment, log_title, self._out)
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