# SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
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import gc
import math
import os

import pynvml
from loguru import logger as logging


class Device:
    _nvml_affinity_elements = math.ceil(os.cpu_count() / 64)  # type: ignore

    def __init__(self, device_idx: int):
        super().__init__()
        self.handle = pynvml.nvmlDeviceGetHandleByIndex(device_idx)

    def get_name(self) -> str:
        return pynvml.nvmlDeviceGetName(self.handle)

    def get_cpu_affinity(self) -> list[int]:
        affinity_string = ""
        for j in pynvml.nvmlDeviceGetCpuAffinity(self.handle, Device._nvml_affinity_elements):
            # assume nvml returns list of 64 bit ints
            affinity_string = "{:064b}".format(j) + affinity_string
        affinity_list = [int(x) for x in affinity_string]
        affinity_list.reverse()  # so core 0 is in 0th element of list
        return [i for i, e in enumerate(affinity_list) if e != 0]
