Sym v1.2.0

Source code for modulus.sym.domain.inferencer.pointwise

# Copyright (c) 2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
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# Unless required by applicable law or agreed to in writing, software
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# See the License for the specific language governing permissions and
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from typing import Dict, List, Union, Callable
from pathlib import Path
import inspect

import torch
import numpy as np

from modulus.sym.domain.inferencer import Inferencer
from modulus.sym.domain.constraint import Constraint
from modulus.sym.graph import Graph
from modulus.sym.key import Key
from modulus.sym.node import Node
from modulus.sym.distributed import DistributedManager
from import InferencerPlotter
from import var_to_polyvtk, VTKBase, VTKUniformGrid
from modulus.sym.dataset import DictInferencePointwiseDataset

[docs]class PointwiseInferencer(Inferencer): """ Pointwise Inferencer that allows inferencing on pointwise data Parameters ---------- nodes : List[Node] List of Modulus Nodes to unroll graph with. invar : Dict[str, np.ndarray (N, 1)] Dictionary of numpy arrays as input. output_names : List[str] List of desired outputs. batch_size : int, optional Batch size used when running validation, by default 1024 plotter : InferencerPlotter Modulus plotter for showing results in tensorboard. requires_grad : bool = False If automatic differentiation is needed for computing results. """ def __init__( self, nodes: List[Node], invar: Dict[str, np.array], output_names: List[str], batch_size: int = 1024, plotter: InferencerPlotter = None, requires_grad: bool = False, model=None, ): # get dataset and dataloader self.dataset = DictInferencePointwiseDataset( invar=invar, output_names=output_names ) self.dataloader = Constraint.get_dataloader( dataset=self.dataset, batch_size=batch_size, shuffle=False, drop_last=False, num_workers=0, distributed=False, infinite=False, ) # construct model from nodes if model is None: self.model = Graph( nodes, Key.convert_list(self.dataset.invar_keys), Key.convert_list(self.dataset.outvar_keys), ) else: self.model = model self.manager = DistributedManager() self.device = self.manager.device # set foward method self.requires_grad = requires_grad self.forward = self.forward_grad if requires_grad else self.forward_nograd # set plotter self.plotter = plotter def eval_epoch(self): invar_cpu = {key: [] for key in self.dataset.invar_keys} predvar_cpu = {key: [] for key in self.dataset.outvar_keys} # Loop through mini-batches for i, (invar0,) in enumerate(self.dataloader): # Move data to device invar = Constraint._set_device( invar0, device=self.device, requires_grad=self.requires_grad ) pred_outvar = self.forward(invar) invar_cpu = {key: value + [invar0[key]] for key, value in invar_cpu.items()} predvar_cpu = { key: value + [pred_outvar[key].cpu().detach().numpy()] for key, value in predvar_cpu.items() } # Concat mini-batch arrays invar = {key: np.concatenate(value) for key, value in invar_cpu.items()} predvar = {key: np.concatenate(value) for key, value in predvar_cpu.items()} return invar, predvar def save_results(self, name, results_dir, writer, save_filetypes, step): # evaluate on entire dataset invar, predvar = self.eval_epoch() # save batch to vtk/np files TODO clean this up after graph unroll stuff if "np" in save_filetypes: np.savez(results_dir + name, {**invar, **predvar}) if "vtk" in save_filetypes: var_to_polyvtk({**invar, **predvar}, results_dir + name) # add tensorboard plots if self.plotter is not None: self.plotter._add_figures( "Inferencers", name, results_dir, writer, step, invar, predvar )
© Copyright 2023, NVIDIA Modulus Team. Last updated on Jan 25, 2024.