Re: Number of processors - C# Discussion Boards

originSH19-Aug-07 10:48

originSH

19-Aug-07 10:48

WMI has a wealth of hardware information. I'm not sure if theres a direct .Net class with the info in it.

originSH20-Aug-07 0:20

originSH

20-Aug-07 0:20

If your going to 1 vote atleast explain why, and how the post could be improved.

Mustafa Ismail Mustafa19-Aug-07 10:52

Mustafa Ismail Mustafa

19-Aug-07 10:52

Use WMI. Try the following:

string cpuInfo = String.Empty;
string temp = String.Empty;
ManagementClass mc = new ManagementClass("Win32_Processor");
ManagementObjectCollection moc = mc.GetInstances();
foreach (ManagementObject mo in moc)
{
if (cpuInfo == String.Empty)
{
cpuInfo = mo.Properties["ProcessorId"].Value.ToString();
}
}

Console.WriteLine(cpuInfo);
Console.ReadLine();

Don't forget to include the System.Management Namespace.

Mustafa Ismail

There are 10 kinds of people in this world. Those who understand binary and those who don't...
______________________

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook

Luc Pattyn19-Aug-07 10:56

Luc Pattyn

19-Aug-07 10:56

Hi,

that is a complex question, and I don't have the complete answer.

What do you call a processor (there is some disagreement):
- there is hyperthreading (basically 2 or more processor states sharing all other
processor resources: functional units, caches, bus interface, ...), which you
can disable through BIOS
- there is multi-processing on a chip
- there is multi-chip packages
- and finally visible multi-processing: more than one IC package

And obviously these can be combined.

That's the technical view. Then there is the matter of software licensing,
which exists in many forms, such as per processor, per system, per seat.
There is room for debate!

Environment.ProcessorCount "Gets the number of processors on the current machine"
whatever that means. I expect/hope it to mean the largest number you can obtain
taking into account all the forementioned possibilities.

Also Process.ProcessorAffinity should have the value 2^n - 1 when
n=Environment.ProcessorCount

Hope this helps

Luc Pattyn [Forum Guidelines] [My Articles]

Jay Gatsby19-Aug-07 13:43

Jay Gatsby

19-Aug-07 13:43

That does help, quite alot! Combined with the other replies, I'm all set. Thanks!

-Gatsby

Hessam Jalali19-Aug-07 11:04

Hessam Jalali

19-Aug-07 11:04

System.Environment.ProcessorCount will give you number of them (actually in some cases will return number of cores not processors just like DeviceManager!)

but if you need to know how many processors are on the machine really you can use WMI to found out

and it would be somewhat like this

static int ProcessorCount()
{
    ManagementObjectSearcher mos = new ManagementObjectSearcher(new SelectQuery("Win32_Processor"));

    ManagementObjectCollection moc = mos.Get();

    List<string> processorIds = new List<string>();

    foreach (ManagementObject mo in moc)
    {
        string pID = mo.Properties["ProcessorId"].Value as string;
        if (!processorIds.Contains(pID))
            processorIds.Add(pID);
    }

    return processorIds.Count;
}

in the code, processorIds were checked and because the cores from the same processor have identical processorIds they're not gonna be counted twice or more

hope the post would be useful

good luck

Re: Urgent help requested

Jay Gatsby19-Aug-07 13:40

Jay Gatsby

19-Aug-07 13:40

Quite helpful! Problem solved. Thank you.

-Gatsby

Urgent help requested

T.D.Prasad19-Aug-07 9:57

T.D.Prasad

19-Aug-07 9:57

Hi,

I am trying to convert a Delphi project to c# project. As part of the project a C-dll is called to conduct simulation (pipe network analysis).

On some of the forms I have placed ZedGraph control. I am able to create these forms immediately before conducting simulation (i.e., before calling unmanaged C dll). However, immediately after simulation (i.e., after calling unmanaged C dll function), I am not able to create these forms. When I try to create these forms the application is abruptly getting terminated. I tried to locate the problem, and found that termination is occuring inside InitializeComponents() function (in particular, it is occuring when trying to initialize zedGraph control). All other forms (which do not contain ZedGraph) are working fine. I am not able to pinpoint the error. Anyone outhere could you please help me in correcting the mistake.

I should point out that the C-dll is working perfectly well as I can see the simulation reasults. However I do not know whether it is corrupting any memory. I can email the source code if anyone is willng to investigate it. I cannot post it here because it is a relatively large project. It will be made available as a freeware very soon.

Thanks in advance.

Regards,
Prasad

Judah Gabriel Himango19-Aug-07 11:31

Judah Gabriel Himango

19-Aug-07 11:31

Prasad, you're not likely to get an answer to your question, and here's why:

1. No meaningful subject line, unlikely to attract people to see your question.

2. No specific question; e.g. you just describe an error and say you'll email someone with the source code.

3. Usage of specialized software: you're encountering a problem with the ZedGraph control. We don't know what this is. Perhaps this question is better suited to the support staff for that software.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Roman Catholic Relevance?
The apostle Paul, modernly speaking: Epistles of Paul

Judah Himango

Changing the style of a combobox

WBurgMo19-Aug-07 9:25

WBurgMo

19-Aug-07 9:25

I have a wide dropdown combobox on a form. I would like to move the button that activates the dropdown list from the right to the left side of the
combobox. I am aware of the RTL property but it also right aligns the text.

Does anyone have a soultion to this problem?

Thanks

James Johnson

Re: Changing the style of a combobox

Mustafa Ismail Mustafa19-Aug-07 10:11

Mustafa Ismail Mustafa

19-Aug-07 10:11

Sorry James, can't be done. I work in a part of the world where RTL is the norm. Short of building your own combobox, there is no ready solution.

There are 10 kinds of people in this world. Those who understand binary and those who don't...
______________________

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook

Unable to attach to application 'Web.Dev.WebServer.Exe'.

T4AMD19-Aug-07 9:04

T4AMD

19-Aug-07 9:04

error Unable to attach to application 'Web.Dev.WebServer.Exe'(PID: 5860). using 'T-PC' which is the name for my SQL Server 2005 running on my machine. A debugger is already attached.

What does this mean??

I am trying to upload an Excel file to my SQL Server 2005 which is running on my machine.

configuration file

MarioMARTIN19-Aug-07 8:44

19-Aug-07 8:44

Hi all,

I have a project that consist of several applications (Windows Services and WPF applications communicating via WCF). All applications need certain configuration information, that should be stored in a central / common file.

One application should also be able to write to this config file and the other apps should automatically notice these changes and read in the new values.

Now I'm looking for a way to realize that. I tried a FileSystemWatcher on a "normal" xml file (not a .Net configuation file) in connection with a Mutex to ensure that no application tries to read the file while another application is writing.

It didn't work (The Mutex seemed to be useless, I always got an exception that told me that the file could not be opened because it is already opened by another process).

Any ideas how I could implement this stuff? Should I stay by my "normal" xml file or should I switch to an .Net configuration based approach?

thanks and regards,

MMartin

Christian Graus19-Aug-07 11:28

Christian Graus

19-Aug-07 11:28

The issue you have is that only one application can have the file open, at a time. So, the file watcher isn't going to work. You'd need instead to do something like have a timer which checks the last update time of a file, and have the code written in such a way that it anticipates the possibility of more than one program trying to read the file at once.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

MarioMARTIN19-Aug-07 20:00

19-Aug-07 20:00

Hi Christian,

thanks for your reply!

"The issue you have is that only one application can have the file open, at a time."

That's what I thought, too, and therefore I added a Mutex.

Loading the config file:

<br />
        Core.Tracer.Info( "LoadConfigFile: Waiting for Mutex: " + i.ToString() );<br />
        m_Mutex.WaitOne();<br />
        Core.Tracer.Info( "LoadConfigFile: Locking Mutex: " + i.ToString() );<br />
        m_Document.Load( ConfigFileName );<br />
        m_Mutex.ReleaseMutex();<br />
        Core.Tracer.Info( "LoadConfigFile: Releasing Mutex: " + i.ToString() );<br />

Writing the config file:

<br />
          Core.Tracer.Info( "SaveConfigFile: Waiting for Mutex: " + i.ToString() );<br />
          m_Mutex.WaitOne();<br />
          Core.Tracer.Info( "SaveConfigFile: Locking Mutex: " + i.ToString() );<br />
          if(m_Watcher != null) m_Watcher.EnableRaisingEvents = false; //disable FileSystemWatcher<br />
          m_Document.Save( ConfigFileName );<br />
          if ( m_Watcher != null ) m_Watcher.EnableRaisingEvents = true;<br />
          m_Mutex.ReleaseMutex();<br />
          Core.Tracer.Info( "SaveConfigFile: Releasing Mutex: " + i.ToString() );<br />

But the Mutex is not working. In my log files I see something like this:

Application 1 Log:

20.08.2007 07:43:20.730; Agent:; LoadConfigFile: Waiting for Mutex: 1
20.08.2007 07:43:20.730; Agent:; LoadConfigFile: Locking Mutex: 1
20.08.2007 07:43:20.733; Agent:; something happend in LoadConfigFile: The process cannot access the file 'C:\Map\Map.config' because it is being used by another process.

Application 2 Log:

20.08.2007 07:43:20.724; Admin:; SaveConfigFile: Waiting for Mutex: 1
20.08.2007 07:43:20.726; Admin:; SaveConfigFile: Locking Mutex: 1
20.08.2007 07:43:20.752; Admin:; SaveConfigFile: Releasing Mutex: 1

I'm losing my mind? Wink | ;-)

How can Application 1 lock the Mutex at 07:43:20.730 when it is already locked by application 2 at 07:43:20.726?

Could it be that Mutex doesn't work in Windows Services?

Thanks,

MMartin

MarioMARTIN19-Aug-07 20:26

19-Aug-07 20:26

Aha,

it seems that the Mutex is not unique:

<br />
        //create a mutex to assure that only one process at a time<br />
        //accesses the config file<br />
        bool isNew = false;<br />
        m_Mutex = new Mutex( false, "Map_ConfigFile_Mutex", out isNew );<br />
        if ( isNew )<br />
        {<br />
          Core.Tracer.Info( "Mutex is new in System" );<br />
        }<br />
        else<br />
        {<br />
          Core.Tracer.Info( "Mutex is NOT new in System" );<br />
        }<br />

Application 1 (Windows Service) log:

20.08.2007 08:09:40.672; Agent:; Mutex is new in System

Application 2 (WPF application) log:

20.08.2007 08:09:33.775; Admin:; Mutex is new in System

I ensured that it is not a life-time problem. The Mutex object exists as long as the application (which created the Mutex) exists. So: How can a Mutex be created by two different processes.

Does it make a difference that one application is a Windows Service?

I noticed that, if Application 1 (Windows Service) creates the Mutex, all other Windows Services will say:

20.08.2007 08:09:41.712; Coordinator:; Mutex is NOT new in System

very confusing...

MMartin

MarioMARTIN19-Aug-07 22:02