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.NET app is slower on dual processor machine
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Bimal Fernando via .Net Guru (VIP)
Hi I created an Application which runs slowly on our Dual processor machine which is a part of a two node cluster too.

To see whether it's a .NET problem i created another test app as below.
            long Start = DateTime.Now.Ticks;
            for (int i=0;i<=1000;i++)
            {
                Console.WriteLine("Print Something >" + i);
                Thread.Sleep(10);
            }
            long End = DateTime.Now.Ticks;
            long Diff = End - Start;
            Console.WriteLine("Time Taken is : " + Diff.ToString());

This runs on my PC about 3 seconds faster than the server. Is this a known problem? any solutionm for this.
I have installed the .NET 1.1 run time on this server but did not restart (it didn't ask me to restart)

please help me to solve this issue.
Thanks in advance.
--------------------------------
From: Bimal Fernando

-----------------------
Posted by a user from .Net Guru (http://www.dot-net-guru.com/)

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Juan (VIP)
It's not unusual that this application run slower in an MP configuration.
Have you perchance analyzed the code that ultimately gets executed to see the
code that gets executed when running on a UP box vs an MP box? Aren't
Console.WriteLine operations inherently serialized?

ALso, the CLR recognizes whether it's running in a UP or MP configuration.
In the MP configuration, on x86, the atomic operations (like cmpxchg) that
the runtime uses are prefixed by 'lock' whereas in the UP mode they're not.
Lock prefixes are expensive are not needed in UP configurations...

Other differences such as the OS kernels between UP and MP modes apply here
as well...
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System.Console
System.DateTime
System.Threading.Thread




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