e04680d141
There is no need for the vmalloc reader to be in the sysmeminfo object. The caller has to create the SysMemInfo object for no reason right now. Bug: 111694435 Test: libmeminfo_test 1 Change-Id: I263c08c169ea6caf2221bfb915b26ef3c0b1c20c Signed-off-by: Sandeep Patil <sspatil@google.com>
93 lines
4 KiB
C++
93 lines
4 KiB
C++
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <sys/types.h>
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#include <functional>
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#include <map>
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#include <string>
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#include <vector>
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namespace android {
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namespace meminfo {
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class SysMemInfo final {
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// System or Global memory accounting
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public:
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static constexpr const char* kMemTotal = "MemTotal:";
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static constexpr const char* kMemFree = "MemFree:";
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static constexpr const char* kMemBuffers = "Buffers:";
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static constexpr const char* kMemCached = "Cached:";
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static constexpr const char* kMemShmem = "Shmem:";
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static constexpr const char* kMemSlab = "Slab:";
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static constexpr const char* kMemSReclaim = "SReclaimable:";
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static constexpr const char* kMemSUnreclaim = "SUnreclaim:";
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static constexpr const char* kMemSwapTotal = "SwapTotal:";
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static constexpr const char* kMemSwapFree = "SwapFree:";
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static constexpr const char* kMemMapped = "Mapped:";
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static constexpr const char* kMemVmallocUsed = "VmallocUsed:";
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static constexpr const char* kMemPageTables = "PageTables:";
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static constexpr const char* kMemKernelStack = "KernelStack:";
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static const std::vector<std::string> kDefaultSysMemInfoTags;
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SysMemInfo() = default;
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// Parse /proc/meminfo and read values that are needed
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bool ReadMemInfo(const std::string& path = "/proc/meminfo");
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bool ReadMemInfo(const std::vector<std::string>& tags, std::vector<uint64_t>* out,
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const std::string& path = "/proc/meminfo");
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bool ReadMemInfo(std::vector<uint64_t>* out, const std::string& path = "/proc/meminfo");
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// Parse /proc/vmallocinfo and return total physical memory mapped
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// in vmalloc area by the kernel.
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// Note that this deliberately ignores binder buffers. They are _always_
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// mapped in a process and are counted for in each process.
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uint64_t ReadVmallocInfo();
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// getters
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uint64_t mem_total_kb() { return mem_in_kb_[kMemTotal]; }
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uint64_t mem_free_kb() { return mem_in_kb_[kMemFree]; }
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uint64_t mem_buffers_kb() { return mem_in_kb_[kMemBuffers]; }
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uint64_t mem_cached_kb() { return mem_in_kb_[kMemCached]; }
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uint64_t mem_shmem_kb() { return mem_in_kb_[kMemShmem]; }
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uint64_t mem_slab_kb() { return mem_in_kb_[kMemSlab]; }
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uint64_t mem_slab_reclaimable_kb() { return mem_in_kb_[kMemSReclaim]; }
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uint64_t mem_slab_unreclaimable_kb() { return mem_in_kb_[kMemSUnreclaim]; }
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uint64_t mem_swap_kb() { return mem_in_kb_[kMemSwapTotal]; }
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uint64_t mem_swap_free_kb() { return mem_in_kb_[kMemSwapFree]; }
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uint64_t mem_mapped_kb() { return mem_in_kb_[kMemMapped]; }
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uint64_t mem_vmalloc_used_kb() { return mem_in_kb_[kMemVmallocUsed]; }
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uint64_t mem_page_tables_kb() { return mem_in_kb_[kMemPageTables]; }
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uint64_t mem_kernel_stack_kb() { return mem_in_kb_[kMemKernelStack]; }
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uint64_t mem_zram_kb(const std::string& zram_dev = "");
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private:
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std::map<std::string, uint64_t> mem_in_kb_;
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bool MemZramDevice(const std::string& zram_dev, uint64_t* mem_zram_dev);
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bool ReadMemInfo(const std::vector<std::string>& tags, const std::string& path,
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std::function<void(const std::string&, uint64_t)> store_val);
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};
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// Parse /proc/vmallocinfo and return total physical memory mapped
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// in vmalloc area by the kernel. Note that this deliberately ignores binder buffers. They are
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// _always_ mapped in a process and are counted for in each process.
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uint64_t ReadVmallocInfo(const std::string& path = "/proc/vmallocinfo");
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} // namespace meminfo
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} // namespace android
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