MozjemallocInfo.cpp (1823B)
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 #include <stdio.h> 8 9 #include "mozmemory.h" 10 11 /* 12 * Print the configured size classes which we can then use to update 13 * documentation. 14 */ 15 int main() { 16 jemalloc_stats_t stats; 17 18 const size_t num_bins = jemalloc_stats_num_bins(); 19 const size_t MAX_NUM_BINS = 100; 20 if (num_bins > MAX_NUM_BINS) { 21 fprintf(stderr, "Exceeded maximum number of jemalloc stats bins"); 22 return 1; 23 } 24 jemalloc_bin_stats_t bin_stats[MAX_NUM_BINS] = {{0}}; 25 jemalloc_stats(&stats, bin_stats); 26 27 printf("\n"); 28 printf("Parameters\n"); 29 printf("----------\n\n"); 30 printf("Page size: %5zu\n", stats.page_size); 31 printf("Chunk size: %5zuKiB\n", stats.chunksize / 1024); 32 printf("Quantum: %5zu\n", stats.quantum); 33 printf("Quantum max: %5zu\n", stats.quantum_max); 34 printf("Sub-page max: %5zu\n", stats.page_size / 2); 35 printf("Large max: %5zuKiB\n", stats.large_max / 1024); 36 37 printf("\n"); 38 printf("Run layout for each bin size\n"); 39 printf("----------------------------\n\n"); 40 printf(" Size | Reg per run | Run size | Overhead\n"); 41 printf("------|-------------|----------|----------\n"); 42 for (unsigned i = 0; i < num_bins; i++) { 43 auto& bin = bin_stats[i]; 44 if (bin.size) { 45 printf("%5zu | %11zu | %5zuKiB | %7.2f%%\n", bin.size, 46 bin.regions_per_run, bin.bytes_per_run / 1024, 47 float(bin.bytes_per_run - (bin.regions_per_run * bin.size)) * 48 100.0f / float(bin.regions_per_run * bin.size)); 49 } 50 } 51 52 return EXIT_SUCCESS; 53 }