source: src/Common/Heap.cc@ 4ea632e

//
// Cforall Version 1.0.0 Copyright (C) 2018 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// Heap.cc --
//
// Author           : Peter A. Buhr
// Created On       :
// Last Modified By : Peter A. Buhr
// Last Modified On : Thu May  3 16:16:10 2018
// Update Count     : 2
//

#include <cassert>
#include <cmath>
#include <cstddef>
#include <cstring>
#include <iomanip>
#include <iostream>

namespace HeapStats {
        #if !defined( WITH_HEAP_STATISTICS )
                void newPass( const char * const ) {}

                void printStats() {}
        #else
                struct StatBlock {
                        const char * name = nullptr;
                        size_t mallocs    = 0;
                        size_t frees      = 0;
                };

                StatBlock    passes[100];
                const size_t passes_size = sizeof(passes) / sizeof(passes[0]);
                size_t       passes_cnt = 0;

                void newPass( const char * const name ) {
                        passes[passes_cnt].name    = name;
                        passes[passes_cnt].mallocs = 0;
                        passes[passes_cnt].frees   = 0;
                        passes_cnt++;

                        assertf(passes_cnt < passes_size, "Too many passes for HeapStats, increase the size of the array in Heap.h");
                }

                void print(size_t value, size_t total) {
                        std::cerr << std::setw(12) << value;
                        std::cerr << "(" << std::setw(3);
                        std::cerr << (value == 0 ? 0 : value * 100 / total);
                        std::cerr << "%) | ";
                }

                void print(const StatBlock& stat, size_t nc, size_t total_mallocs, size_t total_frees) {
                        std::cerr << std::setw(nc) << stat.name;
                        std::cerr << " | ";

                        print(stat.mallocs, total_mallocs);
                        print(stat.frees  , total_frees  );
                        std::cerr << "\n";
                }

                void print(char c, size_t nc) {
                        for(size_t i = 0; i < nc; i++) {
                                std::cerr << c;
                        }
                        std::cerr << '\n';
                }

                void printStats() {
                        size_t nc = 0;
                        size_t total_mallocs = 0;
                        size_t total_frees   = 0;
                        for(size_t i = 0; i < passes_cnt; i++) {
                                nc = std::max(nc, std::strlen(passes[i].name));
                                total_mallocs += passes[i].mallocs;
                                total_frees   += passes[i].frees;
                        }
                        size_t nct = nc + 44;

                        const char * const title = "Heap Usage Statistic";
                        print('=', nct);
                        for(size_t i = 0; i < (nct - std::strlen(title)) / 2; i++) std::cerr << ' ';
                        std::cerr << title << std::endl;

                        print('-', nct);
                        std::cerr << std::setw(nc) << "Pass";
                        std::cerr << " |       Malloc Count |         Free Count |" << std::endl;

                        print('-', nct);
                        for(size_t i = 0; i < passes_cnt; i++) {
                                print(passes[i], nc, total_mallocs, total_frees);
                        }

                        print('-', nct);
                        print({"Sum", total_mallocs, total_frees}, nc, total_mallocs, total_frees);

                }
        #endif
}