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Cheat Engine User
Something epic
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 Posted: Tue Dec 29, 2009 7:55 pm Post subject: So, I've got a bit of an issue with my socket server. |
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It's going berserk on the CPU (load is around the 90 all the time). It's a multiclient one and it works fine but this CPU load worries me, is it a common problem/normal and what is causing it?
I am running on a Windows Server (2003 I believe) and I am using winsock (2.2)
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Slugsnack
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| Posted: Tue Dec 29, 2009 8:15 pm Post subject: |
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| Nope, it's not. Got any code to show us ?
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Cheat Engine User
Something epic
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| Posted: Tue Dec 29, 2009 8:22 pm Post subject: |
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| Slugsnack wrote: | | Nope, it's not. Got any code to show us ? |
Yes I do have the code to show it. But I have nothing to tell besides that I am looping in a while (in main()) and in that I first accept all clients, check for receiving stuff.
| Code: | while(LOOP)
{
t.check();
accept_connections();
receive_data();
} |
It's all that is currently interesting. t.check is a timer that checks if some time has passed and sends something to all clients if it did.
the rest is pretty obvious.
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Dark Byte
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| Posted: Tue Dec 29, 2009 9:06 pm Post subject: |
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I think "select" might be of some use here
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Cheat Engine User
Something epic
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| Posted: Tue Dec 29, 2009 11:00 pm Post subject: |
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| Dark Byte wrote: | | I think "select" might be of some use here |
Explain what you mean.
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tombana
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| Posted: Wed Dec 30, 2009 6:10 am Post subject: |
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| Holland wrote: | | Dark Byte wrote: | | I think "select" might be of some use here |
Explain what you mean. |
He means that normal winsock functions will block. That means that if you call recv() on a socket, it will hold your program until some data arrives. If you have multiple client then this will be a problem. So you can use the function 'select' to first check which clients have send data and then only call recv() on those specific sockets.
There are some other methods as well, they are listed here with their pros and cons:
http://tangentsoft.net/wskfaq/articles/io-strategies.html
It also depends on how many clients you will handle.
If you already have a window in your program I would strongly advise you to use asynchronous sockets because they are very easy to implement.
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