73 lines
1.7 KiB
Go
73 lines
1.7 KiB
Go
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package main
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import (
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"fmt"
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"strconv"
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"sync"
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"time"
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"zhimolostnova_anna_lab_5/util"
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)
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// Параллельное умножение матриц
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func multiplyMatricesParallel(a, b [][]int, threads int) [][]int {
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size := len(a)
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result := make([][]int, size)
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for i := range result {
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result[i] = make([]int, size)
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}
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// Функция для обработки части работы потока
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worker := func(startRow, endRow int, wg *sync.WaitGroup) {
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defer wg.Done()
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for i := startRow; i < endRow; i++ {
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for j := 0; j < size; j++ {
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for k := 0; k < size; k++ {
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result[i][j] += a[i][k] * b[k][j]
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}
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}
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}
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}
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// Запуск потоков
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var wg sync.WaitGroup
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rowsPerThread := size / threads
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for i := 0; i < threads; i++ {
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startRow := i * rowsPerThread
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endRow := startRow + rowsPerThread
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if i == threads-1 {
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endRow = size
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}
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wg.Add(1)
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go worker(startRow, endRow, &wg)
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}
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wg.Wait()
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return result
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}
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func benchmarkMatrixMultiplication(sizes []int, threadsList []int) {
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for _, size := range sizes {
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for _, threads := range threadsList {
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matrixA := util.CreateMatrix(size)
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matrixB := util.CreateMatrix(size)
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start := time.Now()
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_ = multiplyMatricesParallel(matrixA, matrixB, threads)
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elapsed := time.Since(start)
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fmt.Printf("Parallel multiplication of matrix %sx%s with %d threads took %s\n", strconv.Itoa(size), strconv.Itoa(size), threads, elapsed)
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}
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}
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}
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func main() {
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// Список размерностей матриц
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sizes := []int{100, 300, 500}
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// Список количества потоков для тестирования
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threadsList := []int{2, 4, 6, 8}
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// Запуск бенчмарка
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benchmarkMatrixMultiplication(sizes, threadsList)
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}
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