MultiThread

Nibu babu thomas

codeadair wrote:

When i run my multithread program,Why the CPU use is always 100%? Any issues will be appreciated!

You need to Sleep in between. ;)

Nibu thomas A Developer Programming tips[^] My site[^]

codeadair

i need to read data from a equipment continuously. EM! I have found the reason.i evaluate data to a control of form. And how can i avoid the problem? ICQ:258-235-734 MSN:msnadair@hotmail.com

Nibu babu thomas

codeadair wrote:

need to read data from a equipment continuously. EM! I have found the reason.i evaluate data to a control of form. And how can i avoid the problem?

While(bThreadRunning)

'thread stuff
....
Thread.Sleep(someMilliSeconds);

End While

Nibu thomas A Developer Programming tips[^] My site[^]

codeadair

i think i get you. you want to give some milliseconds to the free-time thread that counts the left time of CPU.Therefore CPU use will not be 100%. Thank you for your bright idea. I evalue the data (read from equipment) to form control (textbox).As below: textbox1.text=str.tostring.trim 'str is the data If i alter it to: console.writeline(str.tostring.trim) The cpu use will reduce to 1% more or less. How could i transfer the data to a form control without hige cpu usage? Maybe we could be mailfriends. Contact me by MSN as below Regards. ICQ:258-235-734 MSN:msnadair@hotmail.com -- modified at 6:11 Thursday 25th May, 2006

Nibu babu thomas

codeadair wrote:

How could i transfer the data to a form control without hige cpu usage?

I don't know what you are saying. I have never experienced this. How could CPU usage go up when you are updating the value of a control. Just a min, what is the size of str. Is it too big a string. Edit controls only take a max of 64KB. (:~ ) So if the string size is more that this then frequent updations could lead to 100% CPU usage.

Nibu thomas A Developer Programming tips[^] My site[^]

codeadair

Nibu thomas wrote:

Just a min, what is the size of str. Is it too big a string. Edit controls only take a max of 64KB. () So if the string size is more that this then frequent updations could lead to 100% CPU usage

thanks for your reply integer number. the range is 0~20000. ICQ:258-235-734 MSN:msnadair@hotmail.com

codeadair

Well! The important point is we can't update the form control value(as textbox) in a thread ---a network friend says ICQ:258-235-734 MSN:msnadair@hotmail.com

Nibu babu thomas

codeadair wrote:

thanks for your reply integer number. the range is 0~20000.

Then I am not sure what's going on.

codeadair wrote:

i need to read data from a equipment continuously.

Is this the problem? How much time does it take to interface with this equipment?

Nibu thomas A Developer Programming tips[^] My site[^]

codeadair

Nibu thomas wrote:

Is this the problem? How much time does it take to interface with this equipment?

1ms ICQ:258-235-734 MSN:msnadair@hotmail.com

Nibu babu thomas

codeadair wrote:

The important point is we can't update the form control value(as textbox) in a thread ---a network friend says

That's true. :)

Nibu thomas A Developer Programming tips[^] My site[^]

codeadair

Nibu thomas wrote:

codeadair wrote: The important point is we can't update the form control value(as textbox) in a thread ---a network friend says That's true.

I need to display the data to user.And how could i deal with it? Do be grateful for your help ICQ:258-235-734 MSN:msnadair@hotmail.com

Nibu babu thomas

codeadair wrote:

I need to display the data to user.And how could i deal with it?

You need to use a delegate to invoke a method on an object not created by your thread. Sometime back I had the same problem showing a custom dialog sometime back from a different thread. But fixed it later using delegates. Don't remember the exact thing.:doh: It's been a long time. :)

Nibu thomas A Developer Programming tips[^] My site[^]

codeadair

Yes!Sometime ago the idea flash over my brain due to internet article. OK! i will try the idea! Thank you! ICQ:258-235-734 MSN:msnadair@hotmail.com -- modified at 8:21 Thursday 25th May, 2006