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 <functional> 22 #include <map> 23 #include <string> 24 #include <vector> 25 26 namespace android { 27 namespace meminfo { 28 29 class SysMemInfo final { 30 // System or Global memory accounting 31 public: 32 static constexpr const char* kMemTotal = "MemTotal:"; 33 static constexpr const char* kMemFree = "MemFree:"; 34 static constexpr const char* kMemBuffers = "Buffers:"; 35 static constexpr const char* kMemCached = "Cached:"; 36 static constexpr const char* kMemShmem = "Shmem:"; 37 static constexpr const char* kMemSlab = "Slab:"; 38 static constexpr const char* kMemSReclaim = "SReclaimable:"; 39 static constexpr const char* kMemSUnreclaim = "SUnreclaim:"; 40 static constexpr const char* kMemSwapTotal = "SwapTotal:"; 41 static constexpr const char* kMemSwapFree = "SwapFree:"; 42 static constexpr const char* kMemMapped = "Mapped:"; 43 static constexpr const char* kMemVmallocUsed = "VmallocUsed:"; 44 static constexpr const char* kMemPageTables = "PageTables:"; 45 static constexpr const char* kMemKernelStack = "KernelStack:"; 46 static constexpr const char* kMemKReclaimable = "KReclaimable:"; 47 48 static const std::vector<std::string> kDefaultSysMemInfoTags; 49 50 SysMemInfo() = default; 51 52 // Parse /proc/meminfo and read values that are needed 53 bool ReadMemInfo(const std::string& path = "/proc/meminfo"); 54 bool ReadMemInfo(const std::vector<std::string>& tags, std::vector<uint64_t>* out, 55 const std::string& path = "/proc/meminfo"); 56 bool ReadMemInfo(std::vector<uint64_t>* out, const std::string& path = "/proc/meminfo"); 57 58 // Parse /proc/vmallocinfo and return total physical memory mapped 59 // in vmalloc area by the kernel. 60 // Note that this deliberately ignores binder buffers. They are _always_ 61 // mapped in a process and are counted for in each process. 62 uint64_t ReadVmallocInfo(); 63 64 // getters mem_total_kb()65 uint64_t mem_total_kb() { return mem_in_kb_[kMemTotal]; } mem_free_kb()66 uint64_t mem_free_kb() { return mem_in_kb_[kMemFree]; } mem_buffers_kb()67 uint64_t mem_buffers_kb() { return mem_in_kb_[kMemBuffers]; } mem_cached_kb()68 uint64_t mem_cached_kb() { return mem_in_kb_[kMemCached]; } mem_shmem_kb()69 uint64_t mem_shmem_kb() { return mem_in_kb_[kMemShmem]; } mem_slab_kb()70 uint64_t mem_slab_kb() { return mem_in_kb_[kMemSlab]; } mem_slab_reclaimable_kb()71 uint64_t mem_slab_reclaimable_kb() { return mem_in_kb_[kMemSReclaim]; } mem_slab_unreclaimable_kb()72 uint64_t mem_slab_unreclaimable_kb() { return mem_in_kb_[kMemSUnreclaim]; } mem_swap_kb()73 uint64_t mem_swap_kb() { return mem_in_kb_[kMemSwapTotal]; } mem_swap_free_kb()74 uint64_t mem_swap_free_kb() { return mem_in_kb_[kMemSwapFree]; } mem_mapped_kb()75 uint64_t mem_mapped_kb() { return mem_in_kb_[kMemMapped]; } mem_vmalloc_used_kb()76 uint64_t mem_vmalloc_used_kb() { return mem_in_kb_[kMemVmallocUsed]; } mem_page_tables_kb()77 uint64_t mem_page_tables_kb() { return mem_in_kb_[kMemPageTables]; } mem_kernel_stack_kb()78 uint64_t mem_kernel_stack_kb() { return mem_in_kb_[kMemKernelStack]; } mem_kreclaimable_kb()79 uint64_t mem_kreclaimable_kb() { return mem_in_kb_[kMemKReclaimable]; } 80 uint64_t mem_zram_kb(const std::string& zram_dev = ""); 81 82 private: 83 std::map<std::string, uint64_t> mem_in_kb_; 84 bool MemZramDevice(const std::string& zram_dev, uint64_t* mem_zram_dev); 85 bool ReadMemInfo(const std::vector<std::string>& tags, const std::string& path, 86 std::function<void(const std::string&, uint64_t)> store_val); 87 }; 88 89 // Parse /proc/vmallocinfo and return total physical memory mapped 90 // in vmalloc area by the kernel. Note that this deliberately ignores binder buffers. They are 91 // _always_ mapped in a process and are counted for in each process. 92 uint64_t ReadVmallocInfo(const std::string& path = "/proc/vmallocinfo"); 93 94 // Read ION heaps allocation size in kb 95 bool ReadIonHeapsSizeKb( 96 uint64_t* size, const std::string& path = "/sys/kernel/ion/total_heaps_kb"); 97 98 // Read ION pools allocation size in kb 99 bool ReadIonPoolsSizeKb( 100 uint64_t* size, const std::string& path = "/sys/kernel/ion/total_pools_kb"); 101 102 } // namespace meminfo 103 } // namespace android 104