Reported CPU usage out of range >100 and <0 on virtual machines

[mtullmann1]

Describe the bug
A clear and concise description of what the bug is.

I read Hyper-threading and System Time or Clock Drift could be an issue.
However I am not aware that native tools like Task Manager or Recourse Monitor have the same issue.

To Reproduce
Steps to reproduce the behavior:

1. used function: si.processes();
2. code snippet: I hope the code in the next section will be enough.
3. start app / code
   Since my code is way too large to focus, I wrote a smaller basic version of it.
   Note: This code will only run 3 times and might not catch the issue fast since it is sometimes very

const si = require('systeminformation');

let iteration = 0;
const maxIterations = 3;

async function monitor() {
  try {
    const [processes] = await Promise.all([
      si.processes()
    ]);
    
    const totalCpuProc = processes.list.reduce((sum, p) => sum + (p.cpu || 0), 0);
    
    console.log(`\n┌─────────────────────────────────────────────────────────────────────┐`);
    console.log(`│ Iteration ${++iteration}/${maxIterations} - ${new Date().toLocaleTimeString().padEnd(52)}│`);
    console.log(`├─────────────────────────────────────────────────────────────────────┤`);
    console.log(`│ Total Processes: ${processes.all.toString().padEnd(51)}│`);
    console.log(`│ Total CPU (sum): ${totalCpuProc.toFixed(2)}%`.padEnd(70) + '│');
    console.log(`└─────────────────────────────────────────────────────────────────────┘`);
    
    // Sort by CPU usage (descending)
    const sortedProcs = [...processes.list].sort((a, b) => (b.cpu || 0) - (a.cpu || 0));
    
    console.log(`\n┌──────────┬───────┬────────────┬─────────────────────────────────────┐`);
    console.log(`│ PID      │ CPU%  │ Memory     │ Name                                │`);
    console.log(`├──────────┼───────┼────────────┼─────────────────────────────────────┤`);
    
    sortedProcs.forEach(proc => {
      const pid = (proc.pid || 0).toString().padEnd(8);
      const cpu = (proc.cpu || 0).toFixed(1).padStart(5);
      const mem = ((proc.memRss || 0) / 1024 / 1024).toFixed(1).padStart(7);
      const name = (proc.name || '').substring(0, 36).padEnd(36);
      console.log(`│ ${pid} │ ${cpu} │ ${mem} MB │ ${name}│`);
    });
    
    console.log(`└──────────┴───────┴────────────┴─────────────────────────────────────┘`);
    
  } catch (error) {
    console.error('Error:', error.message);
  }
  
  if (iteration < maxIterations) {
    setTimeout(monitor, 3000);
  } else {
    console.log('\nTest complete!');
  }
}

console.log('Process Monitor - All Processes (3s intervals)\n');
monitor();

4. See output/error

Current Output
If applicable, add output to help explain your problem.

Expected behavior
A clear and concise description of what you expected to happen.
I would expect the same output as in other native tools like Task Manager or Resource Monitor, even inside a busy hypervisor.

Environment (please complete the following information):

• systeminformation package version:
• OS: Windows 11 and Debian 12 (both virtualized), seems to happen also in Docker Debian 12.
• Hardware: Intel Xeon Gold 6348

To get all needed environment information, please run the following command:

  npx systeminformation info

┌─────────────────────────────────────────────────────────────────────────────────────────┐
│  SYSTEMINFORMATION                                                     Version: 5.27.11 │
└─────────────────────────────────────────────────────────────────────────────────────────┘

Operating System:
──────────────────────────────────────────────────────────────────────────────────────────
Platform         : linux
Distro           : Debian GNU/Linux
Release          : 12
Codename         : bookworm
Kernel           : 6.1.0-39-amd64
Arch             : x64
Hostname         : VRA-TST-0037719
Codepage         : UTF-8
Build            : 

System:
──────────────────────────────────────────────────────────────────────────────────────────
Manufacturer     : VMware, Inc.
Model            : VMware7,1
Version          : None
Virtual          : true

CPU:
──────────────────────────────────────────────────────────────────────────────────────────
Manufacturer     : Intel
Brand            : Xeon® Gold 6348
Family           : 6
Model            : 106
Stepping         : 6
Speed            : 2.6
Cores            : 2
PhysicalCores    : 2
PerformanceCores : 2
EfficiencyCores  : 
Processors       : 2
Socket           : 

Additional context
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