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7e77a2ec40
As threads come and go, we can't simply account for how many time slices the threads at any given point may have been using. We need to also account for threads that have since disappeared. This means we also need to track how many time slices we have expired globally. However, because this doesn't account for context switches outside of the system timer tick values may still be under-reported. To solve this we will need to track more accurate time information on each context switch. This also fixes top's cpu usage calculation which was still based on the number of context switches. Fixes #6473
59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
/*
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* Copyright (c) 2021, Aziz Berkay Yesilyurt <abyesilyurt@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/QuickSort.h>
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#include <AK/Vector.h>
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#include <LibCore/ArgsParser.h>
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#include <LibCore/ProcessStatisticsReader.h>
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#include <LibRegex/Regex.h>
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int main(int argc, char** argv)
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{
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if (pledge("stdio rpath", nullptr) < 0) {
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perror("pledge");
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return 1;
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}
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bool case_insensitive = false;
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bool invert_match = false;
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char const* pattern = nullptr;
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Core::ArgsParser args_parser;
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args_parser.add_option(case_insensitive, "Make matches case-insensitive", nullptr, 'i');
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args_parser.add_option(invert_match, "Select non-matching lines", "invert-match", 'v');
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args_parser.add_positional_argument(pattern, "Process name to search for", "process-name");
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args_parser.parse(argc, argv);
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PosixOptions options {};
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if (case_insensitive)
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options |= PosixFlags::Insensitive;
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Regex<PosixExtended> re(pattern, options);
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if (re.parser_result.error != Error::NoError) {
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return 1;
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}
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auto all_processes = Core::ProcessStatisticsReader::get_all();
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if (!all_processes.has_value())
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return 1;
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Vector<pid_t> matches;
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for (auto& it : all_processes.value().processes) {
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auto result = re.match(it.name, PosixFlags::Global);
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if (result.success ^ invert_match) {
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matches.append(it.pid);
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}
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}
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quick_sort(matches);
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for (auto& match : matches) {
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outln("{}", match);
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}
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return 0;
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}
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