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a635ff4e60
This switches tracking CPU usage to more accurately measure time in user and kernel land using either the TSC or another time source. This will also come in handy when implementing a tickless kernel mode.
84 lines
1.7 KiB
C++
84 lines
1.7 KiB
C++
/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/String.h>
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#include <LibCore/File.h>
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#include <unistd.h>
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namespace Core {
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struct ThreadStatistics {
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pid_t tid;
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unsigned times_scheduled;
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u64 time_user;
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u64 time_kernel;
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unsigned syscall_count;
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unsigned inode_faults;
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unsigned zero_faults;
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unsigned cow_faults;
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unsigned unix_socket_read_bytes;
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unsigned unix_socket_write_bytes;
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unsigned ipv4_socket_read_bytes;
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unsigned ipv4_socket_write_bytes;
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unsigned file_read_bytes;
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unsigned file_write_bytes;
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String state;
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u32 cpu;
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u32 priority;
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String name;
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};
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struct ProcessStatistics {
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// Keep this in sync with /proc/all.
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// From the kernel side:
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pid_t pid;
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pid_t pgid;
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pid_t pgp;
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pid_t sid;
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uid_t uid;
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gid_t gid;
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pid_t ppid;
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unsigned nfds;
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bool kernel;
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String name;
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String executable;
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String tty;
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String pledge;
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String veil;
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size_t amount_virtual;
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size_t amount_resident;
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size_t amount_shared;
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size_t amount_dirty_private;
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size_t amount_clean_inode;
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size_t amount_purgeable_volatile;
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size_t amount_purgeable_nonvolatile;
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Vector<Core::ThreadStatistics> threads;
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// synthetic
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String username;
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};
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struct AllProcessesStatistics {
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Vector<ProcessStatistics> processes;
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u64 total_time_scheduled;
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u64 total_time_scheduled_kernel;
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};
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class ProcessStatisticsReader {
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public:
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static Optional<AllProcessesStatistics> get_all(RefPtr<Core::File>&);
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static Optional<AllProcessesStatistics> get_all();
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private:
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static String username_from_uid(uid_t);
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static HashMap<uid_t, String> s_usernames;
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};
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}
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