AW: Still much more than 350 sockets needed!

[Thomas M Steenholdt]

Andrew Haley wrote:
> Wiese, Hendrik writes:
>  > > 
>  > > > Hello again,
>  > > >  
>  > > > we still need to know how to increase the maximum number of
>  > > > possible open sockets per IP address! Here we got the problem
>  > > > that no more than 350 sockets are possible. On another Linux
>  > > > (based on LFS) it is no problem to open far more than 5.000
>  > > > connections on the same way. So we know that it is possible.
>  > > > So how can we break this limitation? Some kind of sysctl?
>  > > > Kernel patch needed? Anything else?
>  > > >  
>  > > > It's urgent, so any kind of help would be greatly appreciated.
>  > > >  
>  > > > Thanks a lot!!!
>  > > >  
>  > > > regards,
>  > > > H. Wiese
>  > > > 
>  > > 
>  > > My /proc/net/sockstat says that i have 541 used sockets on a standard 
>  > > laptop???
>  > > 
>  > > could you a simplified version of the code to create all these sockets
>  > 
>  > > the way you do it?
>  > > 
>  > > That would allow perhaps more people to understand the problem/see for
>  > 
>  > > themselves.
>  > > 
>  > > /Thomas
>  > 
>  > Please try to open that many tcp connections between two IPs and tell me
>  > if it works!
> 
> Try it yourself.  I reckon you'll run out of file descriptors before
> you hit a socket limit.  To do any more you'll have to fork() in the
> server and client.
> 
> Andrew.
> 

Well...

I get way past 350 with these two test processes...
Got to 1020, then the process bailed with :
No socket: Too many open files

/Thomas