To: linux-kernel@vger.rutgers.edu
cc: (bcc: Sergey Tsybanov/San Jose/Memco Software)
Subject: kernel mem for one socket connection.
Sushil Agrawal wrote:
>Hi,
> How much kernel memory does a connected socket occupy? I know of
>following :
>For the fields which are declared pointer to some structure, i am taking
>the size of that structure because eventually it will be kmalloced().
>
>- the file table entry (struct file, struct file_operations, struct
>dentry) = 260 bytes.
>
>- the inode table (struct inode, struct inode_operations, struct
>super_block, struct file_lock) >= 716 bytes.
>
>- struct socket + struct proto_ops = 104 bytes.
>
> Other structures in the network subsystem for a connected socket - How
>
All TCP/IP sockets do share "struct file_operations, struct inode_operations
and struct proto_ops" structures until somebody hack it. And unlike UNIX
"struct socket" is part of "struct inode". I remember somebody mention a right
answer for your question during talking about 15000 connections per one
socket/server.
>Thanks,
>Sushil.
Sergey Tsybanov
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