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 static constexpr const char kDmabufHeapRoot[] = "/dev/dma_heap"; 32 33 class SysMemInfo final { 34 // System or Global memory accounting 35 public: 36 static constexpr const char kMemTotal[] = "MemTotal:"; 37 static constexpr const char kMemFree[] = "MemFree:"; 38 static constexpr const char kMemBuffers[] = "Buffers:"; 39 static constexpr const char kMemCached[] = "Cached:"; 40 static constexpr const char kMemShmem[] = "Shmem:"; 41 static constexpr const char kMemSlab[] = "Slab:"; 42 static constexpr const char kMemSReclaim[] = "SReclaimable:"; 43 static constexpr const char kMemSUnreclaim[] = "SUnreclaim:"; 44 static constexpr const char kMemSwapTotal[] = "SwapTotal:"; 45 static constexpr const char kMemSwapFree[] = "SwapFree:"; 46 static constexpr const char kMemMapped[] = "Mapped:"; 47 static constexpr const char kMemVmallocUsed[] = "VmallocUsed:"; 48 static constexpr const char kMemPageTables[] = "PageTables:"; 49 static constexpr const char kMemKernelStack[] = "KernelStack:"; 50 static constexpr const char kMemKReclaimable[] = "KReclaimable:"; 51 static constexpr const char kMemActive[] = "Active:"; 52 static constexpr const char kMemInactive[] = "Inactive:"; 53 static constexpr const char kMemUnevictable[] = "Unevictable:"; 54 55 56 static constexpr std::initializer_list<std::string_view> kDefaultSysMemInfoTags = { 57 SysMemInfo::kMemTotal, SysMemInfo::kMemFree, SysMemInfo::kMemBuffers, 58 SysMemInfo::kMemCached, SysMemInfo::kMemShmem, SysMemInfo::kMemSlab, 59 SysMemInfo::kMemSReclaim, SysMemInfo::kMemSUnreclaim, SysMemInfo::kMemSwapTotal, 60 SysMemInfo::kMemSwapFree, SysMemInfo::kMemMapped, SysMemInfo::kMemVmallocUsed, 61 SysMemInfo::kMemPageTables, SysMemInfo::kMemKernelStack, SysMemInfo::kMemKReclaimable, 62 SysMemInfo::kMemActive, SysMemInfo::kMemInactive, SysMemInfo::kMemUnevictable, 63 }; 64 65 SysMemInfo() = default; 66 67 // Parse /proc/meminfo and read values that are needed 68 bool ReadMemInfo(const char* path = "/proc/meminfo"); 69 bool ReadMemInfo(size_t ntags, const std::string_view* tags, uint64_t* out, 70 const char* path = "/proc/meminfo"); 71 bool ReadMemInfo(std::vector<uint64_t>* out, const char* path = "/proc/meminfo"); 72 73 // Parse /proc/vmallocinfo and return total physical memory mapped 74 // in vmalloc area by the kernel. 75 // Note that this deliberately ignores binder buffers. They are _always_ 76 // mapped in a process and are counted for in each process. 77 uint64_t ReadVmallocInfo(); 78 79 // getters mem_total_kb()80 uint64_t mem_total_kb() { return mem_in_kb_[kMemTotal]; } mem_free_kb()81 uint64_t mem_free_kb() { return mem_in_kb_[kMemFree]; } mem_buffers_kb()82 uint64_t mem_buffers_kb() { return mem_in_kb_[kMemBuffers]; } mem_cached_kb()83 uint64_t mem_cached_kb() { return mem_in_kb_[kMemCached]; } mem_shmem_kb()84 uint64_t mem_shmem_kb() { return mem_in_kb_[kMemShmem]; } mem_slab_kb()85 uint64_t mem_slab_kb() { return mem_in_kb_[kMemSlab]; } mem_slab_reclaimable_kb()86 uint64_t mem_slab_reclaimable_kb() { return mem_in_kb_[kMemSReclaim]; } mem_slab_unreclaimable_kb()87 uint64_t mem_slab_unreclaimable_kb() { return mem_in_kb_[kMemSUnreclaim]; } mem_swap_kb()88 uint64_t mem_swap_kb() { return mem_in_kb_[kMemSwapTotal]; } mem_swap_free_kb()89 uint64_t mem_swap_free_kb() { return mem_in_kb_[kMemSwapFree]; } mem_mapped_kb()90 uint64_t mem_mapped_kb() { return mem_in_kb_[kMemMapped]; } mem_vmalloc_used_kb()91 uint64_t mem_vmalloc_used_kb() { return mem_in_kb_[kMemVmallocUsed]; } mem_page_tables_kb()92 uint64_t mem_page_tables_kb() { return mem_in_kb_[kMemPageTables]; } mem_kernel_stack_kb()93 uint64_t mem_kernel_stack_kb() { return mem_in_kb_[kMemKernelStack]; } mem_kreclaimable_kb()94 uint64_t mem_kreclaimable_kb() { return mem_in_kb_[kMemKReclaimable]; } mem_active_kb()95 uint64_t mem_active_kb() { return mem_in_kb_[kMemActive]; } mem_inactive_kb()96 uint64_t mem_inactive_kb() { return mem_in_kb_[kMemInactive]; } mem_unevictable_kb()97 uint64_t mem_unevictable_kb() { return mem_in_kb_[kMemUnevictable]; } 98 uint64_t mem_zram_kb(const char* zram_dev = nullptr); 99 100 private: 101 std::map<std::string_view, uint64_t> mem_in_kb_; 102 bool MemZramDevice(const char* zram_dev, uint64_t* mem_zram_dev); 103 bool ReadMemInfo(const char* path, size_t ntags, const std::string_view* tags, 104 std::function<void(std::string_view, uint64_t)> store_val); 105 }; 106 107 // Parse /proc/vmallocinfo and return total physical memory mapped 108 // in vmalloc area by the kernel. Note that this deliberately ignores binder buffers. They are 109 // _always_ mapped in a process and are counted for in each process. 110 uint64_t ReadVmallocInfo(const char* path = "/proc/vmallocinfo"); 111 112 // Read ION heaps allocation size in kb 113 bool ReadIonHeapsSizeKb( 114 uint64_t* size, const std::string& path = "/sys/kernel/ion/total_heaps_kb"); 115 116 // Read ION pools allocation size in kb 117 bool ReadIonPoolsSizeKb( 118 uint64_t* size, const std::string& path = "/sys/kernel/ion/total_pools_kb"); 119 120 // Read DMA-BUF heap pools allocation size in kb 121 bool ReadDmabufHeapPoolsSizeKb(uint64_t* size, 122 const std::string& path = "/sys/kernel/dma_heap/total_pools_kb"); 123 124 // Read GPU total usage size in kb 125 bool ReadGpuTotalUsageKb(uint64_t* size); 126 127 // Read total size of DMA-BUFs exported from the DMA-BUF heap framework in kb 128 bool ReadDmabufHeapTotalExportedKb( 129 uint64_t* size, const std::string& dma_heap_root = kDmabufHeapRoot, 130 const std::string& dma_buf_sysfs_path = "/sys/kernel/dmabuf/buffers"); 131 132 } // namespace meminfo 133 } // namespace android 134