88 lines
3.4 KiB
C++
88 lines
3.4 KiB
C++
/*
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* Copyright (C) 2014 Apple Inc. All rights reserved.
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* Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "Memory.h"
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#include <iostream>
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#include <stdlib.h>
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#ifdef __APPLE__
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#include <mach/mach.h>
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#include <mach/task_info.h>
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#else
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#include <stdio.h>
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#include <unistd.h>
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#endif
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Memory currentMemoryBytes()
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{
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Memory memory;
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#ifdef __APPLE__
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task_vm_info_data_t vm_info;
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mach_msg_type_number_t vm_size = TASK_VM_INFO_COUNT;
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if (KERN_SUCCESS != task_info(mach_task_self(), TASK_VM_INFO_PURGEABLE, (task_info_t)(&vm_info), &vm_size)) {
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std::cout << "Failed to get mach task info" << std::endl;
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exit(1);
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}
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memory.resident = vm_info.internal + vm_info.compressed - vm_info.purgeable_volatile_pmap;
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memory.residentMax = vm_info.resident_size_peak;
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#else
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FILE* file = fopen("/proc/self/status", "r");
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auto forEachLine = [] (FILE* file, auto functor) {
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char* buffer = nullptr;
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size_t size = 0;
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while (getline(&buffer, &size, file) != -1) {
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functor(buffer, size);
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::free(buffer); // Be careful. getline's memory allocation is done by system malloc.
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buffer = nullptr;
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size = 0;
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}
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};
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unsigned long vmHWM = 0;
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unsigned long vmRSS = 0;
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unsigned long rssFile = 0;
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unsigned long rssShmem = 0;
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forEachLine(file, [&] (char* buffer, size_t) {
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unsigned long sizeInKB = 0;
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if (sscanf(buffer, "VmHWM: %lu kB", &sizeInKB) == 1)
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vmHWM = sizeInKB * 1024;
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else if (sscanf(buffer, "VmRSS: %lu kB", &sizeInKB) == 1)
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vmRSS = sizeInKB * 1024;
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else if (sscanf(buffer, "RssFile: %lu kB", &sizeInKB) == 1)
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rssFile = sizeInKB * 1024;
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else if (sscanf(buffer, "RssShmem: %lu kB", &sizeInKB) == 1)
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rssShmem = sizeInKB * 1024;
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});
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fclose(file);
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memory.resident = vmRSS - (rssFile + rssShmem);
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memory.residentMax = vmHWM - (rssFile + rssShmem); // We do not have any way to get the peak of RSS of anonymous pages. Here, we subtract RSS of files and shmem to estimate the peak of RSS of anonymous pages.
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#endif
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return memory;
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}
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