70 lines
2.3 KiB
C++
70 lines
2.3 KiB
C++
#include <iostream>
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#include <format>
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#include <random>
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#include "Kernel.h"
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#include "MMU.h"
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static int MAX_PROC = 10;
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static int PAGE_N = 10;
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int main() {
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std::random_device rd;
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std::mt19937 gen(rd());
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std::uniform_int_distribution<unsigned int> distribution(500, 600), access_type_distr(1, 10);
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Kernel kernel(MAX_PROC, List<PhysicalPage>(), List<PhysicalPage>());
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unsigned int elapsed_time = 0;
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for (int i = 1; i <= PAGE_N; ++i) {
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kernel.free_pages.insert_head(new PhysicalPage(i));
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}
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for (int i = 0; i < kernel.RunQ.capacity(); ++i) {
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kernel.RunQ.emplace_back(new PageTable(distribution(gen)), distribution(gen));
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}
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for (int i = 0; i < 10000; ++i) {
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if (kernel.RunQ.empty()) {
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break;
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}
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std::uniform_int_distribution<unsigned int> index_distribution(0, kernel.RunQ.at(0).pageTable->entries.size() - 1);
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for (int j = 0; j < 30; ++j) {
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const AccessType type = access_type_distr(gen) == 1 ? WRITE : READ;
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const unsigned int index = index_distribution(gen);
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MMU::access(&kernel, kernel.RunQ.at(0).pageTable, index, type);
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}
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++elapsed_time;
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// kernel.stat_update();
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if (kernel.RunQ.at(0).is_finished(elapsed_time)) {
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PhysicalPage *curr, *cached_next;
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unsigned int j;
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const unsigned int cached_len = kernel.busy_pages.get_num();
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for (curr = kernel.busy_pages.get_head(), j = 0;
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curr && curr->next && j < cached_len;
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curr = cached_next, ++j) {
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cached_next = curr->next;
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if (curr->PT == kernel.RunQ.at(0).pageTable) {
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kernel.busy_pages.remove(curr);
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kernel.free_pages.insert_tail(curr);
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}
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}
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delete kernel.RunQ.at(0).pageTable;
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kernel.RunQ.erase(kernel.RunQ.begin());
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kernel.RunQ.emplace_back(new PageTable(distribution(gen)), distribution(gen));
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}
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{
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unsigned int busy_stat = kernel.busy_pages.get_num(), free_stat = kernel.free_pages.get_num();
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std::cout << std::format("[main:metrics] Memory usage stats: busy {}, free {}, total {}", busy_stat, free_stat, free_stat + busy_stat) << std::endl;
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}
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}
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return 0;
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}
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