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tyfon
Joined: 29 Apr 2004
Posts: 4
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 Posted: Thu Apr 29, 2004 12:27 pm Post subject: |
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The FD limit is hardcoded in kernel. Or was. Now it might just be in libc, but anyway it is a bad idea to open that many diffrent FD's in linux.
If these requests are processed sequentially, it is much better to just use one for each connect/accept. And you allways have one for listen().
With 20 threads it should only be 40+1 FD's. It is also important to use shutdown() on the listening socket before terminating the program, or it will fail to listen() next time you run it (for a few minutes).
I'm sitting at a windows pc at work atm, and i dont have internet at home so i cant check stuff. But i have done a bit of socket programming under *bsd/linux .. just wish i had internet at home :p.. I hate moving. Grr
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Ãyvind Jægtnes |
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kris
Joined: 27 Mar 2004
Posts: 1494
Location: South Pacific
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| Posted: Tue May 04, 2004 2:09 am Post subject: |
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| tyfon wrote: | The FD limit is hardcoded in kernel. Or was. Now it might just be in libc, but anyway it is a bad idea to open that many diffrent FD's in linux.
If these requests are processed sequentially, it is much better to just use one for each connect/accept. And you allways have one for listen().
With 20 threads it should only be 40+1 FD's. |
I'd certainly like to reuse 'em. However, socket.accept() typically creates a new FD (depending on what's available for scavanging) and in this particular case, the client test-jig is deliberately stressing the server rather than taking advantage of a "keep-alive" approach.
One would hope to avoid consuming vast quantities of sockets in the manner that this arbitrary test does. Outside of the test-jig, can you point out how to optimize this kind of thing? If you'd like to modify mango.server appropriately, that would be great!
- Kris |
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