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#include <AK/String.h>
#include <AK/HashMap.h>
#include <AK/JsonArray.h>
#include <AK/JsonObject.h>
#include <AK/JsonValue.h>
#include <AK/QuickSort.h>
#include <AK/Vector.h>
#include <LibCore/CProcessStatisticsReader.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
struct ProcessData {
CProcessStatistics stats;
unsigned times_scheduled_since_prev { 0 };
unsigned cpu_percent { 0 };
unsigned cpu_percent_decimal { 0 };
};
struct Snapshot {
HashMap<unsigned, ProcessData> map;
u32 sum_times_scheduled { 0 };
};
static Snapshot get_snapshot()
{
Snapshot snapshot;
auto all_processes = CProcessStatisticsReader::get_all();
for (auto& it : all_processes) {
auto& stats = it.value;
snapshot.sum_times_scheduled += stats.times_scheduled;
ProcessData process_data;
process_data.stats = stats;
snapshot.map.set(stats.pid, move(process_data));
}
return snapshot;
}
int main(int, char**)
{
Vector<ProcessData*> processes;
auto prev = get_snapshot();
usleep(10000);
for (;;) {
auto current = get_snapshot();
auto sum_diff = current.sum_times_scheduled - prev.sum_times_scheduled;
printf("\033[3J\033[H\033[2J");
printf("\033[47;30m%6s %3s %-8s %-8s %6s %6s %4s %s\033[K\033[0m\n",
"PID",
"PRI",
"USER",
"STATE",
"VIRT",
"PHYS",
"%CPU",
"NAME");
for (auto& it : current.map) {
pid_t pid = it.key;
if (pid == 0)
continue;
u32 times_scheduled_now = it.value.stats.times_scheduled;
auto jt = prev.map.find(pid);
if (jt == prev.map.end())
continue;
u32 times_scheduled_before = (*jt).value.stats.times_scheduled;
u32 times_scheduled_diff = times_scheduled_now - times_scheduled_before;
it.value.times_scheduled_since_prev = times_scheduled_diff;
it.value.cpu_percent = ((times_scheduled_diff * 100) / sum_diff);
it.value.cpu_percent_decimal = (((times_scheduled_diff * 1000) / sum_diff) % 10);
processes.append(&it.value);
}
quick_sort(processes.begin(), processes.end(), [](auto* p1, auto* p2) {
return p2->times_scheduled_since_prev < p1->times_scheduled_since_prev;
});
for (auto* process : processes) {
printf("%6d %c %-8s %-10s %6zu %6zu %2u.%1u %s\n",
process->stats.pid,
process->stats.priority[0],
process->stats.username.characters(),
process->stats.state.characters(),
process->stats.amount_virtual / 1024,
process->stats.amount_resident / 1024,
process->cpu_percent,
process->cpu_percent_decimal,
process->stats.name.characters());
}
processes.clear_with_capacity();
prev = move(current);
sleep(1);
}
return 0;
}
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