How much CPU is my web app consuming?

Anuj Varma — Tue, 05 Nov 2013 22:18:55 +0000

Introduction

When running a load test, adding IIS specific performance counters is a good idea (this post details the most important IIS and ASP.NET counters). However, sometimes, all you want is a quick look at the usage (CPU %) for just your web app, you can check it on your localhost. Cassini, Visual Studio’s built-in web server, runs under the process name – WebDev.WebServer40.exe. If you are running IIS 7 or above, the appropriate process name is w3wp.exe (so you would use w3wp as the instance name in the code below)

static void Main(string[] args)
        {
            // do not need the .exe in the instance name
            // For Cassini, instance name = WebDev.WebServer40
            // For IIS 7x , instance name = w3wp 
            PerformanceCounter myAppCpu =
                new PerformanceCounter(
                    "Process", "% Processor Time", "WebDev.WebServer40", true); 
 
            Console.WriteLine("Press any key to stop...\n");
            while (!Console.KeyAvailable)
            {
                double pct = myAppCpu.NextValue();
                Console.WriteLine("WEB APP CPU % = " + pct);
                Thread.Sleep(250);
            }
        }

This provides a quick console view of the processor usage – as you run your test.

Source Code Download

IIS CPU Usagedownload

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How much CPU is my web app consuming?

Introduction

Source Code Download