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https://github.com/smyalygames/FiniteVolumeGPU.git
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117 lines
3.1 KiB
Python
117 lines
3.1 KiB
Python
# -*- coding: utf-8 -*-
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"""
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This python module implements SHMEM (shared memory) simulations for benchmarking
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Copyright (C) 2020 Norwegian Meteorological Institute
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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import numpy as np
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import gc
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import logging
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# Simulator engine etc
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from GPUSimulators import SHMEMSimulatorGroup
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from GPUSimulators.common import run_simulation
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from GPUSimulators.model import EE2DKP07Dimsplit
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from GPUSimulators.helpers import initial_conditions as IC
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####
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# Initialize logging
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####
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log_level_console = 20
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log_level_file = 10
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log_filename = 'shmem.log'
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logger = logging.getLogger('GPUSimulators')
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logger.setLevel(min(log_level_console, log_level_file))
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ch = logging.StreamHandler()
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ch.setLevel(log_level_console)
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logger.addHandler(ch)
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logger.info(f"Console logger using level {logging.getLevelName(log_level_console)}")
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fh = logging.FileHandler(log_filename)
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formatter = logging.Formatter('%(asctime)s:%(name)s:%(levelname)s: %(message)s')
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fh.setFormatter(formatter)
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fh.setLevel(log_level_file)
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logger.addHandler(fh)
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logger.info(f"File logger using level {logging.getLevelName(log_level_file)} to {log_filename}")
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####
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# Initialize SHMEM grid etc
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####
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logger.info("Creating SHMEM grid")
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# XXX: need to explicitly set ngpus when testing on a single-GPU system
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grid = SHMEMSimulatorGroup.SHMEMGrid(ngpus=4)
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####
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# Set initial conditions
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####
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logger.info("Generating initial conditions")
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nx = 128
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ny = 128
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gamma = 1.4
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# save_times = np.linspace(0, 0.01, 10)
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save_times = np.linspace(0, 10, 10)
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save_var_names = ['rho', 'rho_u', 'rho_v', 'E']
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outfile = "shmem_out.nc"
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####
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# Run simulation
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####
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logger.info("Running simulation")
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sims = []
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for i in range(grid.ngpus):
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arguments = IC.gen_kelvin_helmholtz(nx, ny, gamma, grid=grid, index=i)
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arguments['context'] = grid.cuda_contexts[i]
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arguments['theta'] = 1.2
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sims.append(EE2DKP07Dimsplit(**arguments))
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# sims[i] = SHMEMSimulator(i, local_sim, grid) # 1st attempt: no wrapper (per sim)
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arguments['sims'] = sims
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arguments['grid'] = grid
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# Helper function to create SHMEM simulator
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def gen_sim(sims, grid, **kwargs):
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# XXX: kwargs not used, since the simulators are already instantiated in the for-loop above
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sim = SHMEMSimulatorGroup.SHMEMSimulatorGroup(sims, grid)
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return sim
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outfile = run_simulation(gen_sim, arguments, outfile, save_times, save_var_names)
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####
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# Clean shutdown
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####
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sim = None
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local_sim = None
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cuda_context = None
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arguments = None
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logging.shutdown()
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gc.collect()
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####
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# Print completion and exit
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####
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print("Completed!")
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exit(0)
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