1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <sys/types.h> 20 21 #include <array> 22 #include <functional> 23 #include <initializer_list> 24 #include <map> 25 #include <string> 26 #include <string_view> 27 28 namespace android { 29 namespace meminfo { 30 31 class SysMemInfo final { 32 // System or Global memory accounting 33 public: 34 static constexpr const char kMemTotal[] = "MemTotal:"; 35 static constexpr const char kMemFree[] = "MemFree:"; 36 static constexpr const char kMemBuffers[] = "Buffers:"; 37 static constexpr const char kMemCached[] = "Cached:"; 38 static constexpr const char kMemShmem[] = "Shmem:"; 39 static constexpr const char kMemSlab[] = "Slab:"; 40 static constexpr const char kMemSReclaim[] = "SReclaimable:"; 41 static constexpr const char kMemSUnreclaim[] = "SUnreclaim:"; 42 static constexpr const char kMemSwapTotal[] = "SwapTotal:"; 43 static constexpr const char kMemSwapFree[] = "SwapFree:"; 44 static constexpr const char kMemMapped[] = "Mapped:"; 45 static constexpr const char kMemVmallocUsed[] = "VmallocUsed:"; 46 static constexpr const char kMemPageTables[] = "PageTables:"; 47 static constexpr const char kMemKernelStack[] = "KernelStack:"; 48 static constexpr const char kMemKReclaimable[] = "KReclaimable:"; 49 50 static constexpr std::initializer_list<std::string_view> kDefaultSysMemInfoTags = { 51 SysMemInfo::kMemTotal, SysMemInfo::kMemFree, SysMemInfo::kMemBuffers, 52 SysMemInfo::kMemCached, SysMemInfo::kMemShmem, SysMemInfo::kMemSlab, 53 SysMemInfo::kMemSReclaim, SysMemInfo::kMemSUnreclaim, SysMemInfo::kMemSwapTotal, 54 SysMemInfo::kMemSwapFree, SysMemInfo::kMemMapped, SysMemInfo::kMemVmallocUsed, 55 SysMemInfo::kMemPageTables, SysMemInfo::kMemKernelStack, SysMemInfo::kMemKReclaimable, 56 }; 57 58 SysMemInfo() = default; 59 60 // Parse /proc/meminfo and read values that are needed 61 bool ReadMemInfo(const char* path = "/proc/meminfo"); 62 bool ReadMemInfo(size_t ntags, const std::string_view* tags, uint64_t* out, 63 const char* path = "/proc/meminfo"); 64 bool ReadMemInfo(std::vector<uint64_t>* out, const char* path = "/proc/meminfo"); 65 66 // Parse /proc/vmallocinfo and return total physical memory mapped 67 // in vmalloc area by the kernel. 68 // Note that this deliberately ignores binder buffers. They are _always_ 69 // mapped in a process and are counted for in each process. 70 uint64_t ReadVmallocInfo(); 71 72 // getters 73 uint64_t mem_total_kb() { return mem_in_kb_[kMemTotal]; } 74 uint64_t mem_free_kb() { return mem_in_kb_[kMemFree]; } 75 uint64_t mem_buffers_kb() { return mem_in_kb_[kMemBuffers]; } 76 uint64_t mem_cached_kb() { return mem_in_kb_[kMemCached]; } 77 uint64_t mem_shmem_kb() { return mem_in_kb_[kMemShmem]; } 78 uint64_t mem_slab_kb() { return mem_in_kb_[kMemSlab]; } 79 uint64_t mem_slab_reclaimable_kb() { return mem_in_kb_[kMemSReclaim]; } 80 uint64_t mem_slab_unreclaimable_kb() { return mem_in_kb_[kMemSUnreclaim]; } 81 uint64_t mem_swap_kb() { return mem_in_kb_[kMemSwapTotal]; } 82 uint64_t mem_swap_free_kb() { return mem_in_kb_[kMemSwapFree]; } 83 uint64_t mem_mapped_kb() { return mem_in_kb_[kMemMapped]; } 84 uint64_t mem_vmalloc_used_kb() { return mem_in_kb_[kMemVmallocUsed]; } 85 uint64_t mem_page_tables_kb() { return mem_in_kb_[kMemPageTables]; } 86 uint64_t mem_kernel_stack_kb() { return mem_in_kb_[kMemKernelStack]; } 87 uint64_t mem_kreclaimable_kb() { return mem_in_kb_[kMemKReclaimable]; } 88 uint64_t mem_zram_kb(const char* zram_dev = nullptr); 89 90 private: 91 std::map<std::string_view, uint64_t> mem_in_kb_; 92 bool MemZramDevice(const char* zram_dev, uint64_t* mem_zram_dev); 93 bool ReadMemInfo(const char* path, size_t ntags, const std::string_view* tags, 94 std::function<void(std::string_view, uint64_t)> store_val); 95 }; 96 97 // Parse /proc/vmallocinfo and return total physical memory mapped 98 // in vmalloc area by the kernel. Note that this deliberately ignores binder buffers. They are 99 // _always_ mapped in a process and are counted for in each process. 100 uint64_t ReadVmallocInfo(const char* path = "/proc/vmallocinfo"); 101 102 // Read ION heaps allocation size in kb 103 bool ReadIonHeapsSizeKb( 104 uint64_t* size, const std::string& path = "/sys/kernel/ion/total_heaps_kb"); 105 106 // Read ION pools allocation size in kb 107 bool ReadIonPoolsSizeKb( 108 uint64_t* size, const std::string& path = "/sys/kernel/ion/total_pools_kb"); 109 110 } // namespace meminfo 111 } // namespace android 112