blob: 83889208d7d43616a06737eae460813fc94148bb [file] [log] [blame]
/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <sys/types.h>
#include <functional>
#include <map>
#include <string>
#include <vector>
namespace android {
namespace meminfo {
class SysMemInfo final {
// System or Global memory accounting
public:
static constexpr const char* kMemTotal = "MemTotal:";
static constexpr const char* kMemFree = "MemFree:";
static constexpr const char* kMemBuffers = "Buffers:";
static constexpr const char* kMemCached = "Cached:";
static constexpr const char* kMemShmem = "Shmem:";
static constexpr const char* kMemSlab = "Slab:";
static constexpr const char* kMemSReclaim = "SReclaimable:";
static constexpr const char* kMemSUnreclaim = "SUnreclaim:";
static constexpr const char* kMemSwapTotal = "SwapTotal:";
static constexpr const char* kMemSwapFree = "SwapFree:";
static constexpr const char* kMemMapped = "Mapped:";
static constexpr const char* kMemVmallocUsed = "VmallocUsed:";
static constexpr const char* kMemPageTables = "PageTables:";
static constexpr const char* kMemKernelStack = "KernelStack:";
static const std::vector<std::string> kDefaultSysMemInfoTags;
SysMemInfo() = default;
// Parse /proc/meminfo and read values that are needed
bool ReadMemInfo(const std::string& path = "/proc/meminfo");
bool ReadMemInfo(const std::vector<std::string>& tags, std::vector<uint64_t>* out,
const std::string& path = "/proc/meminfo");
bool ReadMemInfo(std::vector<uint64_t>* out, const std::string& path = "/proc/meminfo");
// Parse /proc/vmallocinfo and return total physical memory mapped
// in vmalloc area by the kernel.
// Note that this deliberately ignores binder buffers. They are _always_
// mapped in a process and are counted for in each process.
uint64_t ReadVmallocInfo();
// getters
uint64_t mem_total_kb() { return mem_in_kb_[kMemTotal]; }
uint64_t mem_free_kb() { return mem_in_kb_[kMemFree]; }
uint64_t mem_buffers_kb() { return mem_in_kb_[kMemBuffers]; }
uint64_t mem_cached_kb() { return mem_in_kb_[kMemCached]; }
uint64_t mem_shmem_kb() { return mem_in_kb_[kMemShmem]; }
uint64_t mem_slab_kb() { return mem_in_kb_[kMemSlab]; }
uint64_t mem_slab_reclaimable_kb() { return mem_in_kb_[kMemSReclaim]; }
uint64_t mem_slab_unreclaimable_kb() { return mem_in_kb_[kMemSUnreclaim]; }
uint64_t mem_swap_kb() { return mem_in_kb_[kMemSwapTotal]; }
uint64_t mem_swap_free_kb() { return mem_in_kb_[kMemSwapFree]; }
uint64_t mem_mapped_kb() { return mem_in_kb_[kMemMapped]; }
uint64_t mem_vmalloc_used_kb() { return mem_in_kb_[kMemVmallocUsed]; }
uint64_t mem_page_tables_kb() { return mem_in_kb_[kMemPageTables]; }
uint64_t mem_kernel_stack_kb() { return mem_in_kb_[kMemKernelStack]; }
uint64_t mem_zram_kb(const std::string& zram_dev = "");
private:
std::map<std::string, uint64_t> mem_in_kb_;
bool MemZramDevice(const std::string& zram_dev, uint64_t* mem_zram_dev);
bool ReadMemInfo(const std::vector<std::string>& tags, const std::string& path,
std::function<void(const std::string&, uint64_t)> store_val);
};
// Parse /proc/vmallocinfo and return total physical memory mapped
// in vmalloc area by the kernel. Note that this deliberately ignores binder buffers. They are
// _always_ mapped in a process and are counted for in each process.
uint64_t ReadVmallocInfo(const std::string& path = "/proc/vmallocinfo");
} // namespace meminfo
} // namespace android