[Mono-bugs] [Bug 649426] New: Async.Sleep(1) in F sharp consumes 100% of CPU

[bugzilla_noreply at novell.com]

https://bugzilla.novell.com/show_bug.cgi?id=649426

https://bugzilla.novell.com/show_bug.cgi?id=649426#c0


           Summary: Async.Sleep(1) in F sharp consumes 100% of CPU
    Classification: Mono
           Product: Mono: Runtime
           Version: 2.4.x
          Platform: x86-64
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: misc
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: igor at xambala.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---
           Blocker: ---


User-Agent:       Mozilla/5.0 (Windows NT 5.1; rv:2.0b6) Gecko/20100101
Firefox/4.0b6

Calling Async.Sleep(1) in a loop consumes 100% of CPU. Running on Windows does
not produce the same result
Async.Sleep(2) is almost ok, but occasionally spikes into low 10%s

here's the source:

#light

open System
open System.IO



[<EntryPoint>]
let main (args : string[]) =

    let fileread =
        async {

                while true do
                    do! Async.Sleep(0)
                ()
        }
     |> Async.RunSynchronously

    0



Reproducible: Always

Steps to Reproduce:
Compile the attached source, run it.
Run top. Observe.
Actual Results:  
100% CPU consumption

Expected Results:  
0%, as observed on Windows

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