performancecounter | 易学教程

List all processes and their current memory & CPU consumption?

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问题 How can I get a list of all processes in C# and then for each process current memory and CPU consumption? Sample code is highly appreciated. 回答1: The Process class has a GetProcesses method that will let you enumerate the running processes and list a bunch of stats like memory usage and CPU time. Look at the documentation under properties for the stats. Memory usage is a complex matter. There is really no single number, that describe the usage. Please see Russinovich's excellent series on the

Retrieve process network usage

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问题 How can I get a process send/receive bytes? the preferred way is doing it with C#. I've searched this a lot and I didn't find any simple solution for this. Some solutions suggested to install the WinPCap on the machine and to work with this lib. Like this guy asked: Need "Processes with Network Activity" functionality in managed code - Like resmon.exe does it I don't want the overhead of the lib. Is there a simple solution for this? Actually I want the exactly data that the Resource Monitor

How to map Win32 types to C# types when using P/Invoke?

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问题 I am trying to do something like this in C#. I found out how to call Win32 methods from C# using P/Invoke from this link. However I met some difficulties in implementing P/Invoke. For example, one of the methods that I would like to access is PdhOpenQuery, signature: PDH_STATUS PdhOpenQuery( __in LPCTSTR szDataSource, __in DWORD_PTR dwUserData, __out PDH_HQUERY *phQuery ); I figure the corresponding C# declaration should be something like this [DllImport("Pdh.dll")] static extern PDH_STATUS

Why the cpu performance counter kept reporting 0% cpu usage?

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PerformanceCounter cpuload = new PerformanceCounter(); cpuload.CategoryName = "Processor"; cpuload.CounterName = "% Processor Time"; cpuload.InstanceName = "_Total"; Console.WriteLine(cpuload.NextValue() + "%"); The output is always 0%, while the cpuload.RawValue is like 736861484375 or so, what happened at NextValue() ? The first iteration of he counter will always be 0, because it has nothing to compare to the last value. Try this: var cpuload = new PerformanceCounter("Processor", "% Processor Time", "_Total"); Console.WriteLine(cpuload.NextValue() + "%"); Console.WriteLine(cpuload.NextValue

Performance Counter by Process ID instead of name?

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问题 I am tracking multiple instances of the same application and need to get the memory and cpu use of both processes. However, I cant seem to figure out a way to use the performance counter and know which result is for which process. I have seen that I can append #1 and such to the end of the name to get results for each, but that doesn't tell me which one is for which process. How can I determine the ProcessId or pass the process ID to the counter to get the result per each process with same

How to get CPU usage for more than 2 cores?

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问题 I try to get in my program CPU usage divided by a cores. Now I use the PerformanceCounter and changing the InstanceName between 0 and 1 I have the data from 2 cores. PerformanceCounter pc0 = new PerformanceCounter("Processor", "% Processor Time", "0"); PerformanceCounter pc1 = new PerformanceCounter("Processor", "% Processor Time", "1"); How I can get core usage for 3rd, 4th core etc.? Does anyone can help me? Thanks 回答1: I havent used PerformanceCounter before but is there something wrong

What is the correct Performance Counter to get CPU and Memory Usage of a Process?

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How can I get the CPU and Memory usage of a particular process using the .NET PerformanceCounter class? And also what is the difference between Processor\% Processor Time and Process\% Processor Time ? I am a bit confused between these two. SwDevMan81 From this post: To get the entire PC CPU and Memory usage: using System.Diagnostics; Then declare globally: private PerformanceCounter theCPUCounter = new PerformanceCounter("Processor", "% Processor Time", "_Total"); Then to get the CPU time, simply call the NextValue() method: this.theCPUCounter.NextValue(); This will get you the CPU usage As

How to determine total size of ASP.Net cache?

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问题 I'm using the ASP.net cache in a web project, and I'm writing a "status" page for it which shows the items in the cache, and as many statistics about the cache as I can find. Is there any way that I can get the total size (in bytes) of the cached data? The size of each item would be even better. I want to display this on a web page, so I don't think I can use a performance counter. 回答1: I am looking at my performance monitor and under the ASP.NET Apps v2.0.50727 category I have the following

How to measure program execution time in ARM Cortex-A8 processor?

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I'm using an ARM Cortex-A8 based processor called as i.MX515. There is linux Ubuntu 9.10 distribution. I'm running a very big application written in C and I'm making use of gettimeofday(); functions to measure the time my application takes. main() { gettimeofday(start); .... .... .... gettimeofday(end); } This method was sufficient to look at what blocks of my application was taking what amount of time. But, now that, I'm trying to optimize my code very throughly, with the gettimeofday() method of calculating time, I see a lot of fluctuation between successive runs (Run before and after my

Using PerformanceCounter to track memory and CPU usage per process?

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问题 How can I use System.Diagnostics.PerformanceCounter to track the memory and CPU usage for a process? 回答1: For per process data: Process p = /*get the desired process here*/; PerformanceCounter ramCounter = new PerformanceCounter("Process", "Working Set", p.ProcessName); PerformanceCounter cpuCounter = new PerformanceCounter("Process", "% Processor Time", p.ProcessName); while (true) { Thread.Sleep(500); double ram = ramCounter.NextValue(); double cpu = cpuCounter.NextValue(); Console