Bug 59541 - Wrong user and privileged processor time
Summary: Wrong user and privileged processor time
Alias: None
Product: Runtime
Classification: Mono
Component: General ()
Version: 5.2 (2017-04)
Hardware: PC Linux
: --- normal
Target Milestone: ---
Assignee: Bugzilla
Depends on:
Reported: 2017-09-16 07:23 UTC by Jan Tolenaar
Modified: 2017-09-27 13:36 UTC (History)
4 users (show)

Is this bug a regression?: ---
Last known good build:

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Description Jan Tolenaar 2017-09-16 07:23:23 UTC
The program shown below reports different times on mono 3.8.1 and 5.2:

mono 3.8.1  2.58 user time, 0.008 privileged time
mono 5.2       0 user time, 2.52 privileged time

        using System;
        using System.Diagnostics;

        namespace ProcessorTimeBug
            class MainClass
                public static void Main (string [] args)
                    var j = 0;
                    for (Int64 i = 0; i < 10L * 1000 * 1000 * 1000; ++i)

                    var p = Process.GetCurrentProcess ();
                    var t1 = p.UserProcessorTime.TotalSeconds;
                    var t2 = p.PrivilegedProcessorTime.TotalSeconds;
                    Console.WriteLine ("{0} user time, {1} privileged time", t1, t2);
Comment 1 Ludovic Henry 2017-09-26 14:55:47 UTC
Comment 2 Alexander Köplinger [MSFT] 2017-09-27 13:36:22 UTC
The PR was merged.