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 #include <unordered_map> 28 29 namespace android { 30 namespace meminfo { 31 32 static constexpr const char kDmabufHeapRoot[] = "/dev/dma_heap"; 33 34 class SysMemInfo final { 35 // System or Global memory accounting 36 public: 37 static constexpr const char kMemTotal[] = "MemTotal:"; 38 static constexpr const char kMemFree[] = "MemFree:"; 39 static constexpr const char kMemBuffers[] = "Buffers:"; 40 static constexpr const char kMemCached[] = "Cached:"; 41 static constexpr const char kMemShmem[] = "Shmem:"; 42 static constexpr const char kMemSlab[] = "Slab:"; 43 static constexpr const char kMemSReclaim[] = "SReclaimable:"; 44 static constexpr const char kMemSUnreclaim[] = "SUnreclaim:"; 45 static constexpr const char kMemSwapTotal[] = "SwapTotal:"; 46 static constexpr const char kMemSwapFree[] = "SwapFree:"; 47 static constexpr const char kMemMapped[] = "Mapped:"; 48 static constexpr const char kMemVmallocUsed[] = "VmallocUsed:"; 49 static constexpr const char kMemPageTables[] = "PageTables:"; 50 static constexpr const char kMemKernelStack[] = "KernelStack:"; 51 static constexpr const char kMemKReclaimable[] = "KReclaimable:"; 52 static constexpr const char kMemActive[] = "Active:"; 53 static constexpr const char kMemInactive[] = "Inactive:"; 54 static constexpr const char kMemUnevictable[] = "Unevictable:"; 55 static constexpr const char kMemAvailable[] = "MemAvailable:"; 56 static constexpr const char kMemActiveAnon[] = "Active(anon):"; 57 static constexpr const char kMemInactiveAnon[] = "Inactive(anon):"; 58 static constexpr const char kMemActiveFile[] = "Active(file):"; 59 static constexpr const char kMemInactiveFile[] = "Inactive(file):"; 60 static constexpr const char kMemCmaTotal[] = "CmaTotal:"; 61 static constexpr const char kMemCmaFree[] = "CmaFree:"; 62 63 static constexpr std::initializer_list<std::string_view> kDefaultSysMemInfoTags = { 64 SysMemInfo::kMemTotal, SysMemInfo::kMemFree, SysMemInfo::kMemBuffers, 65 SysMemInfo::kMemCached, SysMemInfo::kMemShmem, SysMemInfo::kMemSlab, 66 SysMemInfo::kMemSReclaim, SysMemInfo::kMemSUnreclaim, SysMemInfo::kMemSwapTotal, 67 SysMemInfo::kMemSwapFree, SysMemInfo::kMemMapped, SysMemInfo::kMemVmallocUsed, 68 SysMemInfo::kMemPageTables, SysMemInfo::kMemKernelStack, SysMemInfo::kMemKReclaimable, 69 SysMemInfo::kMemActive, SysMemInfo::kMemInactive, SysMemInfo::kMemUnevictable, 70 SysMemInfo::kMemAvailable, SysMemInfo::kMemActiveAnon, SysMemInfo::kMemInactiveAnon, 71 SysMemInfo::kMemActiveFile, SysMemInfo::kMemInactiveFile, SysMemInfo::kMemCmaTotal, 72 SysMemInfo::kMemCmaFree, 73 }; 74 75 SysMemInfo() = default; 76 77 // Parse /proc/meminfo and read values that are needed 78 bool ReadMemInfo(const char* path = "/proc/meminfo"); 79 bool ReadMemInfo(size_t ntags, const std::string_view* tags, uint64_t* out, 80 const char* path = "/proc/meminfo"); 81 bool ReadMemInfo(std::vector<uint64_t>* out, const char* path = "/proc/meminfo"); 82 83 // Parse /proc/vmallocinfo and return total physical memory mapped 84 // in vmalloc area by the kernel. 85 // Note that this deliberately ignores binder buffers. They are _always_ 86 // mapped in a process and are counted for in each process. 87 uint64_t ReadVmallocInfo(); 88 89 // getters mem_total_kb()90 uint64_t mem_total_kb() const { return find_mem_by_tag(kMemTotal); } mem_free_kb()91 uint64_t mem_free_kb() const { return find_mem_by_tag(kMemFree); } mem_buffers_kb()92 uint64_t mem_buffers_kb() const { return find_mem_by_tag(kMemBuffers); } mem_cached_kb()93 uint64_t mem_cached_kb() const { return find_mem_by_tag(kMemCached); } mem_shmem_kb()94 uint64_t mem_shmem_kb() const { return find_mem_by_tag(kMemShmem); } mem_slab_kb()95 uint64_t mem_slab_kb() const { return find_mem_by_tag(kMemSlab); } mem_slab_reclaimable_kb()96 uint64_t mem_slab_reclaimable_kb() const { return find_mem_by_tag(kMemSReclaim); } mem_slab_unreclaimable_kb()97 uint64_t mem_slab_unreclaimable_kb() const { return find_mem_by_tag(kMemSUnreclaim); } mem_swap_kb()98 uint64_t mem_swap_kb() const { return find_mem_by_tag(kMemSwapTotal); } mem_swap_free_kb()99 uint64_t mem_swap_free_kb() const { return find_mem_by_tag(kMemSwapFree); } mem_mapped_kb()100 uint64_t mem_mapped_kb() const { return find_mem_by_tag(kMemMapped); } mem_vmalloc_used_kb()101 uint64_t mem_vmalloc_used_kb() const { return find_mem_by_tag(kMemVmallocUsed); } mem_page_tables_kb()102 uint64_t mem_page_tables_kb() const { return find_mem_by_tag(kMemPageTables); } mem_kernel_stack_kb()103 uint64_t mem_kernel_stack_kb() const { return find_mem_by_tag(kMemKernelStack); } mem_kreclaimable_kb()104 uint64_t mem_kreclaimable_kb() const { return find_mem_by_tag(kMemKReclaimable); } mem_active_kb()105 uint64_t mem_active_kb() const { return find_mem_by_tag(kMemActive); } mem_inactive_kb()106 uint64_t mem_inactive_kb() const { return find_mem_by_tag(kMemInactive); } mem_unevictable_kb()107 uint64_t mem_unevictable_kb() const { return find_mem_by_tag(kMemUnevictable); } mem_available_kb()108 uint64_t mem_available_kb() const { return find_mem_by_tag(kMemAvailable); } mem_active_anon_kb()109 uint64_t mem_active_anon_kb() const { return find_mem_by_tag(kMemActiveAnon); } mem_inactive_anon_kb()110 uint64_t mem_inactive_anon_kb() const { return find_mem_by_tag(kMemInactiveAnon); } mem_active_file_kb()111 uint64_t mem_active_file_kb() const { return find_mem_by_tag(kMemActiveFile); } mem_inactive_file_kb()112 uint64_t mem_inactive_file_kb() const { return find_mem_by_tag(kMemInactiveFile); } mem_cma_total_kb()113 uint64_t mem_cma_total_kb() const { return find_mem_by_tag(kMemCmaTotal); } mem_cma_free_kb()114 uint64_t mem_cma_free_kb() const { return find_mem_by_tag(kMemCmaFree); } 115 uint64_t mem_zram_kb(const char* zram_dev = nullptr) const; 116 uint64_t mem_compacted_kb(const char* zram_dev = nullptr); 117 118 private: 119 std::map<std::string_view, uint64_t> mem_in_kb_; 120 bool MemZramDevice(const char* zram_dev, uint64_t* mem_zram_dev) const; 121 bool GetTotalMemCompacted(const char* zram_dev, uint64_t* out_mem_compacted); 122 bool ReadMemInfo(const char* path, size_t ntags, const std::string_view* tags, 123 std::function<void(std::string_view, uint64_t)> store_val); 124 // Convenience function to avoid duplicating code for each memory category. find_mem_by_tag(const char kTag[])125 uint64_t find_mem_by_tag(const char kTag[]) const { 126 auto it = mem_in_kb_.find(kTag); 127 if (it != mem_in_kb_.end()) { 128 return it->second; 129 } 130 return 0; 131 } 132 }; 133 134 // Parse /proc/vmallocinfo and return total physical memory mapped 135 // in vmalloc area by the kernel. Note that this deliberately ignores binder buffers. They are 136 // _always_ mapped in a process and are counted for in each process. 137 uint64_t ReadVmallocInfo(const char* path = "/proc/vmallocinfo"); 138 139 // Read ION heaps allocation size in kb 140 bool ReadIonHeapsSizeKb( 141 uint64_t* size, const std::string& path = "/sys/kernel/ion/total_heaps_kb"); 142 143 // Read ION pools allocation size in kb 144 bool ReadIonPoolsSizeKb( 145 uint64_t* size, const std::string& path = "/sys/kernel/ion/total_pools_kb"); 146 147 // Read DMA-BUF heap pools allocation size in kb 148 bool ReadDmabufHeapPoolsSizeKb(uint64_t* size, 149 const std::string& path = "/sys/kernel/dma_heap/total_pools_kb"); 150 151 // Read per-process GPU memory usage. Returns a map of pid -> GPU Mem in kilobytes. 152 bool ReadPerProcessGpuMem(std::unordered_map<uint32_t, uint64_t>* out); 153 154 // Read GPU usage of the specified process in kb. 155 bool ReadProcessGpuUsageKb(uint32_t pid, uint32_t gpu_id, uint64_t* size); 156 157 // Read GPU total usage size in kb 158 bool ReadGpuTotalUsageKb(uint64_t* size); 159 160 // Read total size of DMA-BUFs exported from the DMA-BUF heap framework in kb 161 bool ReadDmabufHeapTotalExportedKb( 162 uint64_t* size, const std::string& dma_heap_root = kDmabufHeapRoot, 163 const std::string& dma_buf_sysfs_path = "/sys/kernel/dmabuf/buffers"); 164 165 } // namespace meminfo 166 } // namespace android 167