| /* |
| * 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. |
| */ |
| |
| #include <dirent.h> |
| #include <errno.h> |
| #include <inttypes.h> |
| #include <linux/kernel-page-flags.h> |
| #include <linux/oom.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #include <iostream> |
| #include <memory> |
| #include <sstream> |
| #include <vector> |
| |
| #include <android-base/file.h> |
| #include <android-base/parseint.h> |
| #include <android-base/stringprintf.h> |
| #include <android-base/strings.h> |
| |
| #include <meminfo/procmeminfo.h> |
| #include <meminfo/sysmeminfo.h> |
| |
| using ::android::meminfo::MemUsage; |
| using ::android::meminfo::ProcMemInfo; |
| |
| struct ProcessRecord { |
| public: |
| ProcessRecord(pid_t pid, bool get_wss = false, uint64_t pgflags = 0, uint64_t pgflags_mask = 0) |
| : pid_(-1), |
| procmem_(nullptr), |
| oomadj_(OOM_SCORE_ADJ_MAX + 1), |
| cmdline_(""), |
| proportional_swap_(0), |
| unique_swap_(0), |
| zswap_(0) { |
| std::unique_ptr<ProcMemInfo> procmem = |
| std::make_unique<ProcMemInfo>(pid, get_wss, pgflags, pgflags_mask); |
| if (procmem == nullptr) { |
| std::cerr << "Failed to create ProcMemInfo for: " << pid << std::endl; |
| return; |
| } |
| |
| std::string fname = ::android::base::StringPrintf("/proc/%d/oom_score_adj", pid); |
| auto oomscore_fp = |
| std::unique_ptr<FILE, decltype(&fclose)>{fopen(fname.c_str(), "re"), fclose}; |
| if (oomscore_fp == nullptr) { |
| std::cerr << "Failed to open oom_score_adj file: " << fname << std::endl; |
| return; |
| } |
| |
| if (fscanf(oomscore_fp.get(), "%d\n", &oomadj_) != 1) { |
| std::cerr << "Failed to read oomadj from: " << fname << std::endl; |
| return; |
| } |
| |
| fname = ::android::base::StringPrintf("/proc/%d/cmdline", pid); |
| if (!::android::base::ReadFileToString(fname, &cmdline_)) { |
| std::cerr << "Failed to read cmdline from: " << fname << std::endl; |
| cmdline_ = "<unknown>"; |
| } |
| // We deliberately don't read the proc/<pid>cmdline file directly into 'cmdline_' |
| // because of some processes showing up cmdlines that end with "0x00 0x0A 0x00" |
| // e.g. xtra-daemon, lowi-server |
| // The .c_str() assignment below then takes care of trimming the cmdline at the first |
| // 0x00. This is how original procrank worked (luckily) |
| cmdline_.resize(strlen(cmdline_.c_str())); |
| procmem_ = std::move(procmem); |
| pid_ = pid; |
| } |
| |
| bool valid() const { return pid_ != -1; } |
| |
| void CalculateSwap(const uint16_t* swap_offset_array, float zram_compression_ratio) { |
| const std::vector<uint16_t>& swp_offs = procmem_->SwapOffsets(); |
| for (auto& off : swp_offs) { |
| proportional_swap_ += getpagesize() / swap_offset_array[off]; |
| unique_swap_ += swap_offset_array[off] == 1 ? getpagesize() : 0; |
| zswap_ = proportional_swap_ * zram_compression_ratio; |
| } |
| } |
| |
| // Getters |
| pid_t pid() const { return pid_; } |
| const std::string& cmdline() const { return cmdline_; } |
| int32_t oomadj() const { return oomadj_; } |
| uint64_t proportional_swap() const { return proportional_swap_; } |
| uint64_t unique_swap() const { return unique_swap_; } |
| uint64_t zswap() const { return zswap_; } |
| |
| // Wrappers to ProcMemInfo |
| const std::vector<uint16_t>& SwapOffsets() const { return procmem_->SwapOffsets(); } |
| const MemUsage& Usage() const { return procmem_->Usage(); } |
| const MemUsage& Wss() const { return procmem_->Wss(); } |
| |
| private: |
| pid_t pid_; |
| std::unique_ptr<ProcMemInfo> procmem_; |
| int32_t oomadj_; |
| std::string cmdline_; |
| uint64_t proportional_swap_; |
| uint64_t unique_swap_; |
| uint64_t zswap_; |
| }; |
| |
| // Show working set instead of memory consumption |
| bool show_wss = false; |
| // Reset working set of each process |
| bool reset_wss = false; |
| // Show per-process oom_score_adj column |
| bool show_oomadj = false; |
| // True if the device has swap enabled |
| bool has_swap = false; |
| // True, if device has zram enabled |
| bool has_zram = false; |
| // If zram is enabled, the compression ratio is zram used / swap used. |
| float zram_compression_ratio = 0.0; |
| // Sort process in reverse, default is descending |
| bool reverse_sort = false; |
| |
| // Calculated total memory usage across all processes in the system |
| uint64_t total_pss = 0; |
| uint64_t total_uss = 0; |
| uint64_t total_swap = 0; |
| uint64_t total_pswap = 0; |
| uint64_t total_uswap = 0; |
| uint64_t total_zswap = 0; |
| |
| static void usage(const char* myname) { |
| std::cerr << "Usage: " << myname << " [ -W ] [ -v | -r | -p | -u | -s | -h ]" << std::endl |
| << " -v Sort by VSS." << std::endl |
| << " -r Sort by RSS." << std::endl |
| << " -p Sort by PSS." << std::endl |
| << " -u Sort by USS." << std::endl |
| << " -s Sort by swap." << std::endl |
| << " (Default sort order is PSS.)" << std::endl |
| << " -R Reverse sort order (default is descending)." << std::endl |
| << " -c Only show cached (storage backed) pages" << std::endl |
| << " -C Only show non-cached (ram/swap backed) pages" << std::endl |
| << " -k Only show pages collapsed by KSM" << std::endl |
| << " -w Display statistics for working set only." << std::endl |
| << " -W Reset working set of all processes." << std::endl |
| << " -o Show and sort by oom score against lowmemorykiller thresholds." |
| << std::endl |
| << " -h Display this help screen." << std::endl; |
| } |
| |
| static bool read_all_pids(std::vector<pid_t>* pids, std::function<bool(pid_t pid)> for_each_pid) { |
| pids->clear(); |
| std::unique_ptr<DIR, int (*)(DIR*)> procdir(opendir("/proc"), closedir); |
| if (!procdir) return false; |
| |
| struct dirent* dir; |
| pid_t pid; |
| while ((dir = readdir(procdir.get()))) { |
| if (!::android::base::ParseInt(dir->d_name, &pid)) continue; |
| if (!for_each_pid(pid)) return false; |
| pids->push_back(pid); |
| } |
| |
| return true; |
| } |
| |
| static bool count_swap_offsets(const ProcessRecord& proc, uint16_t* swap_offset_array, |
| uint32_t size) { |
| const std::vector<uint16_t>& swp_offs = proc.SwapOffsets(); |
| for (auto& off : swp_offs) { |
| if (off >= size) { |
| std::cerr << "swap offset " << off << " is out of bounds for process: " << proc.pid() |
| << std::endl; |
| return false; |
| } |
| |
| if (swap_offset_array[off] == USHRT_MAX) { |
| std::cerr << "swap offset " << off << " ref count overflow in process: " << proc.pid() |
| << std::endl; |
| return false; |
| } |
| |
| swap_offset_array[off]++; |
| } |
| |
| return true; |
| } |
| |
| static void print_header(std::stringstream& ss) { |
| ss.str(""); |
| ss << ::android::base::StringPrintf("%5s ", "PID"); |
| if (show_oomadj) { |
| ss << ::android::base::StringPrintf("%5s ", "oom"); |
| } |
| |
| if (show_wss) { |
| ss << ::android::base::StringPrintf("%7s %7s %7s ", "WRss", "WPss", "WUss"); |
| // now swap statistics here, working set pages by definition shouldn't end up in swap. |
| } else { |
| ss << ::android::base::StringPrintf("%8s %7s %7s %7s ", "Vss", "Rss", "Pss", "Uss"); |
| if (has_swap) { |
| ss << ::android::base::StringPrintf("%7s %7s %7s ", "Swap", "PSwap", "USwap"); |
| if (has_zram) { |
| ss << ::android::base::StringPrintf("%7s ", "ZSwap"); |
| } |
| } |
| } |
| |
| ss << "cmdline"; |
| } |
| |
| static void print_process_record(std::stringstream& ss, ProcessRecord& proc) { |
| ss << ::android::base::StringPrintf("%5d ", proc.pid()); |
| if (show_oomadj) { |
| ss << ::android::base::StringPrintf("%5d ", proc.oomadj()); |
| } |
| |
| if (show_wss) { |
| ss << ::android::base::StringPrintf("%6" PRIu64 "K %6" PRIu64 "K %6" PRIu64 "K ", |
| proc.Wss().rss / 1024, proc.Wss().pss / 1024, |
| proc.Wss().uss / 1024); |
| } else { |
| ss << ::android::base::StringPrintf("%7" PRIu64 "K %6" PRIu64 "K %6" PRIu64 "K %6" PRIu64 |
| "K ", |
| proc.Usage().vss / 1024, proc.Usage().rss / 1024, |
| proc.Usage().pss / 1024, proc.Usage().uss / 1024); |
| if (has_swap) { |
| ss << ::android::base::StringPrintf("%6" PRIu64 "K ", proc.Usage().swap / 1024); |
| ss << ::android::base::StringPrintf("%6" PRIu64 "K ", proc.proportional_swap() / 1024); |
| ss << ::android::base::StringPrintf("%6" PRIu64 "K ", proc.unique_swap() / 1024); |
| if (has_zram) { |
| ss << ::android::base::StringPrintf("%6" PRIu64 "K ", (proc.zswap() / 1024)); |
| } |
| } |
| } |
| } |
| |
| static void print_processes(std::stringstream& ss, std::vector<ProcessRecord>& procs, |
| uint16_t* swap_offset_array) { |
| for (auto& proc : procs) { |
| total_pss += show_wss ? proc.Wss().pss : proc.Usage().pss; |
| total_uss += show_wss ? proc.Wss().uss : proc.Usage().uss; |
| if (!show_wss && has_swap) { |
| proc.CalculateSwap(swap_offset_array, zram_compression_ratio); |
| total_swap += proc.Usage().swap; |
| total_pswap += proc.proportional_swap(); |
| total_uswap += proc.unique_swap(); |
| if (has_zram) { |
| total_zswap += proc.zswap(); |
| } |
| } |
| |
| print_process_record(ss, proc); |
| ss << proc.cmdline() << std::endl; |
| } |
| } |
| |
| static void print_separator(std::stringstream& ss) { |
| ss << ::android::base::StringPrintf("%5s ", ""); |
| if (show_oomadj) { |
| ss << ::android::base::StringPrintf("%5s ", ""); |
| } |
| |
| if (show_wss) { |
| ss << ::android::base::StringPrintf("%7s %7s %7s ", "", "------", "------"); |
| } else { |
| ss << ::android::base::StringPrintf("%8s %7s %7s %7s ", "", "", "------", "------"); |
| if (has_swap) { |
| ss << ::android::base::StringPrintf("%7s %7s %7s ", "------", "------", "------"); |
| if (has_zram) { |
| ss << ::android::base::StringPrintf("%7s ", "------"); |
| } |
| } |
| } |
| |
| ss << ::android::base::StringPrintf("%s", "------"); |
| } |
| |
| static void print_totals(std::stringstream& ss) { |
| ss << ::android::base::StringPrintf("%5s ", ""); |
| if (show_oomadj) { |
| ss << ::android::base::StringPrintf("%5s ", ""); |
| } |
| |
| if (show_wss) { |
| ss << ::android::base::StringPrintf("%7s %6" PRIu64 "K %6" PRIu64 "K ", "", |
| total_pss / 1024, total_uss / 1024); |
| } else { |
| ss << ::android::base::StringPrintf("%8s %7s %6" PRIu64 "K %6" PRIu64 "K ", "", "", |
| total_pss / 1024, total_uss / 1024); |
| if (has_swap) { |
| ss << ::android::base::StringPrintf("%6" PRIu64 "K ", total_swap / 1024); |
| ss << ::android::base::StringPrintf("%6" PRIu64 "K ", total_pswap / 1024); |
| ss << ::android::base::StringPrintf("%6" PRIu64 "K ", total_uswap / 1024); |
| if (has_zram) { |
| ss << ::android::base::StringPrintf("%6" PRIu64 "K ", total_zswap / 1024); |
| } |
| } |
| } |
| ss << "TOTAL"; |
| } |
| |
| static void print_sysmeminfo(std::stringstream& ss, ::android::meminfo::SysMemInfo& smi) { |
| if (has_swap) { |
| ss << ::android::base::StringPrintf("ZRAM: %" PRIu64 "K physical used for %" PRIu64 |
| "K in swap " |
| "(%" PRIu64 "K total swap)", |
| smi.mem_zram_kb(), |
| (smi.mem_swap_kb() - smi.mem_swap_free_kb()), |
| smi.mem_swap_kb()) |
| << std::endl; |
| } |
| |
| ss << ::android::base::StringPrintf(" RAM: %" PRIu64 "K total, %" PRIu64 "K free, %" PRIu64 |
| "K buffers, " |
| "%" PRIu64 "K cached, %" PRIu64 "K shmem, %" PRIu64 |
| "K slab", |
| smi.mem_total_kb(), smi.mem_free_kb(), smi.mem_buffers_kb(), |
| smi.mem_cached_kb(), smi.mem_shmem_kb(), smi.mem_slab_kb()); |
| } |
| |
| int main(int argc, char* argv[]) { |
| auto pss_sort = [](ProcessRecord& a, ProcessRecord& b) { |
| MemUsage stats_a = show_wss ? a.Wss() : a.Usage(); |
| MemUsage stats_b = show_wss ? b.Wss() : b.Usage(); |
| return reverse_sort ? stats_a.pss < stats_b.pss : stats_a.pss > stats_b.pss; |
| }; |
| |
| auto uss_sort = [](ProcessRecord& a, ProcessRecord& b) { |
| MemUsage stats_a = show_wss ? a.Wss() : a.Usage(); |
| MemUsage stats_b = show_wss ? b.Wss() : b.Usage(); |
| return reverse_sort ? stats_a.uss < stats_b.uss : stats_a.uss > stats_b.uss; |
| }; |
| |
| auto rss_sort = [](ProcessRecord& a, ProcessRecord& b) { |
| MemUsage stats_a = show_wss ? a.Wss() : a.Usage(); |
| MemUsage stats_b = show_wss ? b.Wss() : b.Usage(); |
| return reverse_sort ? stats_a.rss < stats_b.pss : stats_a.pss > stats_b.pss; |
| }; |
| |
| auto vss_sort = [](ProcessRecord& a, ProcessRecord& b) { |
| MemUsage stats_a = show_wss ? a.Wss() : a.Usage(); |
| MemUsage stats_b = show_wss ? b.Wss() : b.Usage(); |
| return reverse_sort ? stats_a.vss < stats_b.vss : stats_a.vss > stats_b.vss; |
| }; |
| |
| auto swap_sort = [](ProcessRecord& a, ProcessRecord& b) { |
| MemUsage stats_a = show_wss ? a.Wss() : a.Usage(); |
| MemUsage stats_b = show_wss ? b.Wss() : b.Usage(); |
| return reverse_sort ? stats_a.swap < stats_b.swap : stats_a.swap > stats_b.swap; |
| }; |
| |
| auto oomadj_sort = [](ProcessRecord& a, ProcessRecord& b) { |
| return reverse_sort ? a.oomadj() < b.oomadj() : a.oomadj() > b.oomadj(); |
| }; |
| |
| // default PSS sort |
| std::function<bool(ProcessRecord & a, ProcessRecord & b)> proc_sort = pss_sort; |
| |
| // count all pages by default |
| uint64_t pgflags = 0; |
| uint64_t pgflags_mask = 0; |
| |
| int opt; |
| while ((opt = getopt(argc, argv, "cChkoprRsuvwW")) != -1) { |
| switch (opt) { |
| case 'c': |
| pgflags = 0; |
| pgflags_mask = (1 << KPF_SWAPBACKED); |
| break; |
| case 'C': |
| pgflags = (1 << KPF_SWAPBACKED); |
| pgflags_mask = (1 << KPF_SWAPBACKED); |
| break; |
| case 'h': |
| usage(argv[0]); |
| return 0; |
| break; |
| case 'k': |
| pgflags = (1 << KPF_KSM); |
| pgflags_mask = (1 << KPF_KSM); |
| break; |
| case 'o': |
| proc_sort = oomadj_sort; |
| show_oomadj = true; |
| break; |
| case 'p': |
| proc_sort = pss_sort; |
| break; |
| case 'r': |
| proc_sort = rss_sort; |
| break; |
| case 'R': |
| reverse_sort = true; |
| break; |
| case 's': |
| proc_sort = swap_sort; |
| break; |
| case 'u': |
| proc_sort = uss_sort; |
| break; |
| case 'v': |
| proc_sort = vss_sort; |
| break; |
| case 'w': |
| show_wss = true; |
| break; |
| case 'W': |
| reset_wss = true; |
| break; |
| default: |
| abort(); |
| } |
| } |
| |
| std::vector<pid_t> pids; |
| std::vector<ProcessRecord> procs; |
| if (reset_wss) { |
| if (!read_all_pids(&pids, |
| [&](pid_t pid) -> bool { return ProcMemInfo::ResetWorkingSet(pid); })) { |
| std::cerr << "Failed to reset working set of all processes" << std::endl; |
| exit(EXIT_FAILURE); |
| } |
| // we are done, all other options passed to procrank are ignored in the presence of '-W' |
| return 0; |
| } |
| |
| ::android::meminfo::SysMemInfo smi; |
| if (!smi.ReadMemInfo()) { |
| std::cerr << "Failed to get system memory info" << std::endl; |
| exit(EXIT_FAILURE); |
| } |
| |
| // Figure out swap and zram |
| uint64_t swap_total = smi.mem_swap_kb() * 1024; |
| has_swap = swap_total > 0; |
| // Allocate the swap array |
| auto swap_offset_array = std::make_unique<uint16_t[]>(swap_total / getpagesize()); |
| if (has_swap) { |
| has_zram = smi.mem_zram_kb() > 0; |
| if (has_zram) { |
| zram_compression_ratio = static_cast<float>(smi.mem_zram_kb()) / |
| (smi.mem_swap_kb() - smi.mem_swap_free_kb()); |
| } |
| } |
| |
| auto mark_swap_usage = [&](pid_t pid) -> bool { |
| ProcessRecord proc(pid, show_wss, pgflags, pgflags_mask); |
| if (!proc.valid()) { |
| std::cerr << "Failed to create process record for: " << pid << std::endl; |
| return false; |
| } |
| |
| // Skip processes with no memory mappings |
| uint64_t vss = show_wss ? proc.Wss().vss : proc.Usage().vss; |
| if (vss == 0) return true; |
| |
| // collect swap_offset counts from all processes in 1st pass |
| if (!show_wss && has_swap && |
| !count_swap_offsets(proc, swap_offset_array.get(), swap_total / getpagesize())) { |
| std::cerr << "Failed to count swap offsets for process: " << pid << std::endl; |
| return false; |
| } |
| |
| procs.push_back(std::move(proc)); |
| return true; |
| }; |
| |
| // Get a list of all pids currently running in the system in |
| // 1st pass through all processes. Mark each swap offset used by the process as we find them |
| // for calculating proportional swap usage later. |
| if (!read_all_pids(&pids, mark_swap_usage)) { |
| std::cerr << "Failed to read all pids from the system" << std::endl; |
| exit(EXIT_FAILURE); |
| } |
| |
| std::stringstream ss; |
| if (procs.empty()) { |
| // This would happen in corner cases where procrank is being run to find KSM usage on a |
| // system with no KSM and combined with working set determination as follows |
| // procrank -w -u -k |
| // procrank -w -s -k |
| // procrank -w -o -k |
| ss << "<empty>" << std::endl << std::endl; |
| print_sysmeminfo(ss, smi); |
| ss << std::endl; |
| std::cout << ss.str(); |
| return 0; |
| } |
| |
| // Sort all process records, default is PSS descending |
| std::sort(procs.begin(), procs.end(), proc_sort); |
| |
| // start dumping output in string stream |
| print_header(ss); |
| ss << std::endl; |
| |
| // 2nd pass to calculate and get per process stats to add them up |
| print_processes(ss, procs, swap_offset_array.get()); |
| |
| // Add separator to output |
| print_separator(ss); |
| ss << std::endl; |
| |
| // Add totals to output |
| print_totals(ss); |
| ss << std::endl << std::endl; |
| |
| // Add system information at the end |
| print_sysmeminfo(ss, smi); |
| ss << std::endl; |
| |
| // dump on the screen |
| std::cout << ss.str(); |
| |
| return 0; |
| } |