2023-12-28 20:28:13 +00:00
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#include <libproc.h>
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#include <time.h>
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#include <mach/mach_time.h>
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#include <stdlib.h>
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#include "lfmacos.h"
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2024-01-12 15:49:53 +00:00
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#define NS_TO_SECONDS 1000000000.0
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#define NEW_PROCESS_SENTINEL (-1.0)
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2023-12-28 20:28:13 +00:00
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ProcessData *new_ProcessData() {
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ProcessData *pd = malloc(sizeof(ProcessData));
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2024-01-12 15:49:53 +00:00
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pd->last_total_consumed = NEW_PROCESS_SENTINEL;
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2023-12-28 20:28:13 +00:00
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return pd;
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}
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int update_process(pid_t pid, ProcessData *proc) {
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struct proc_taskinfo taskinfo;
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const int r = proc_pidinfo(pid, PROC_PIDTASKINFO, 0, &taskinfo, PROC_PIDTASKINFO_SIZE);
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if (r != PROC_PIDTASKINFO_SIZE) {
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return 1;
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}
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mach_timebase_info_data_t info;
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mach_timebase_info(&info);
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const double ns_per_tick = (double)info.numer / (double)info.denom;
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time(&(proc->timestamp));
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2024-01-12 15:49:53 +00:00
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proc->total_kernel_time = (taskinfo.pti_total_system * ns_per_tick) / NS_TO_SECONDS;
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proc->total_user_time = (taskinfo.pti_total_user * ns_per_tick) / NS_TO_SECONDS;
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2023-12-28 20:28:13 +00:00
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proc->virtual_memory = taskinfo.pti_virtual_size;
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proc->resident_memory = taskinfo.pti_resident_size;
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2024-01-12 15:49:53 +00:00
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if (proc->last_total_consumed != NEW_PROCESS_SENTINEL) {
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time_t t = proc->timestamp - proc->last_timestamp;
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proc->percent_cpu = 100.0 * (proc->total_user_time + proc->total_kernel_time - proc->last_total_consumed) / t;
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2023-12-28 20:28:13 +00:00
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} else {
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proc->percent_cpu = 0.0;
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}
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2024-01-12 15:49:53 +00:00
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2023-12-28 20:28:13 +00:00
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proc->last_timestamp = proc->timestamp;
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proc->last_total_consumed = proc->total_kernel_time + proc->total_user_time;
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return 0;
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}
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