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Windows 10 Perfmon / resource Meter vs Taskmanager

Buc Repus 1 Reputation point
2020-11-17T19:06:08.703+00:00

(Windows 10) I am using Perfmon to look at the total bytes/sec on a machine. However, the value returned from perfmon is nowhere close to what task manager displays as the traffic rate. Taskmanager may display 20 Mbps received while permon displays 1.5 Mbps. I can easily reproduce this across pretty much any Windows box. Even if I open resource meter from taskmanager the values are nowhere near the same. Any ideas? I am trying to troubleshoot network utilization issues. Perfmon seems useless in this situation, or either taskmanager is incorrect.
Thanks

Windows 10 Network
Windows 10 Network
Windows 10: A Microsoft operating system that runs on personal computers and tablets.Network: A group of devices that communicate either wirelessly or via a physical connection.
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  1. Gary Nebbett 5,721 Reputation points
    2020-11-18T09:12:08.3+00:00

    Hello BucRepus,

    It is easy to be confused whether the numbers refer to bits or bytes.

    Task Manager uses abbreviations like Mbps and Kbps - these are "bits per second" values.

    Perform typically uses text like "Bytes Total/sec" - these are obviously "bytes per second" values.

    1.5 megabytes per second is about 12 megabits per second - in the same ballpark as 20 megabits per second.

    The values that you are seeing are almost certainly both "correct", but may be reporting on network traffic from subtly different perspectives.

    Gary

    1 person found this answer helpful.