44 lines
1.7 KiB
Python
44 lines
1.7 KiB
Python
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import random as rnd
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import time
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import concurrent.futures
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def gen_square_matrix(size):
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return [[rnd.randint(1, 100) for _ in range(size)] for _ in range(size)]
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# Параллельное вычисление определителя
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def parallel_det(matrix, num_threads):
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n = len(matrix)
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# Определитель
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det_value = 1
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def process_row(i, j):
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factor = matrix[j][i] / matrix[i][i]
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for k in range(i, n):
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matrix[j][k] -= factor * matrix[i][k]
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for i in range(n):
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if matrix[i][i] == 0:
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for j in range(i + 1, n):
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if matrix[j][i] != 0:
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matrix[i], matrix[j] = matrix[j], matrix[i]
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det_value *= -1
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break
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else:
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return 0
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# Параллельное вычисление
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with concurrent.futures.ThreadPoolExecutor(max_workers=num_threads) as executor:
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futures = [
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executor.submit(process_row, i, j) for j in range(i + 1, n)
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]
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concurrent.futures.wait(futures)
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# Обновление определителя
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det_value *= matrix[i][i]
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return det_value
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if __name__ == "__main__":
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sizes = [100, 300, 500]
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num_threads = [1, 5, 8]
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for size in sizes:
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matrix = gen_square_matrix(size)
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for threads in num_threads:
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start_time = time.time()
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parallel_det(matrix, threads)
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end_time = time.time()
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print(f"Параллельное вычисление определителя.\tРазмер: {size}, {threads} потоков\t|\t {end_time - start_time}")
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print("=" * 100)
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