[ofw][patch][WinVerbs tests] Re: fix IPv6related connectionproblem

[Diego Guella]

----- Original Message ----- 
>From: "Leonid Keller"
>> You can use the __rdtsc ...
>We gave up this way.
> __rdtsc is complained on the Web to be unstable function, especially in
>multi-processor environment.

I am coding a test application right now, and faced the same problem.
I haven't found a real solution, and I'm interested in how you will solve this.
These are the informations I found:

http://www.virtualdub.org/blog/pivot/entry.php?id=106
http://blogs.msdn.com/oldnewthing/archive/2008/09/08/8931563.aspx
http://support.microsoft.com/kb/172338/en-us
http://support.microsoft.com/kb/938448/en-us
http://support.microsoft.com/kb/274323/en-us

I'm still using QueryPerformanceCounter right now, but I don't really know how much trust to put in it.

>If it is that simple why didn't Microsoft use it in
>QueryPerformanceCounter implementation ? :(
>
>Let's formulate our problem:
>We have to measure a very fast process and the time T of the
>time stamping itself influence the results.
>
>Possible solutions:
>1. Exclude T from the result by some artificial trick. (as in the
>discussed patch)
>2. Measure T before the loop and subtract after.
>3. Make stampings once in N loops decreasing N times it's influence.
>4. ?
>
>What would you prefere ?
>
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