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Full Discussion: Socket memory
Top Forums Programming Socket memory Post 302443187 by Corona688 on Saturday 7th of August 2010 11:45:38 AM
Old 08-07-2010
You are creating new threads every time you receive a connection! Threads of course take memory. You're not properly letting the threads finish, either. To free up their memory when they quit, you should do pthread_join in main().

You can also reduce the stack size before you create the thread with pthread_attr_setstacksize. (there's also a nice example under the pthread_create manpage.) The stack size should be at least 16384 bytes and, on most systems, a multiple of 4096 bytes. It should also be as large as it needs to be to contain all the thread's local variables and function calls, or you may start getting mysterious segmentation faults when calls nest too deep.
Last edited by Corona688; 08-07-2010 at 12:51 PM..
 

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LEARN ABOUT SUNOS

in.daytimed

in.daytimed(1M) 					  System Administration Commands					   in.daytimed(1M)

NAME

       in.daytimed - UDP or TCP daytime protocol service daemon

SYNOPSIS

       in.daytimed

       FMRI
       svc:/internet/daytime:default

DESCRIPTION

       FMRI  stands  for  Fault  Management  Resource  Identifier.  It is used to identify resources managed by the Fault Manager. See fmd(1M) and
       smf(5).

       The in.daytimed service provides the server-side of the daytime protocol. This protocol is used for debugging and bandwidth measurement and
       is available on both TCP and UDP transports, through port 13.

       The  in.daytimed  service  is  an inetd(1M) smf(5) delegated service. The in.daytimed detects which transport is requested by examining the
       socket it is passed by the inetd daemon.

       TCP-based service

	   Once a connection is established, the in.daytimed generates the current date and time in ctime(3C) format as 7-bit ASCII and  sends	it
	   through the connection. The server then closes the connection. Any data received from the client side of the connection is discarded.

       UDP-based service

	   The	in.daytimed  listens  for  UDP datagrams. When a datagram is received, the server generates the current date and time in ctime(3C)
	   format as 7-bit ASCII and inserts it in a UDP datagram sent in response to the client's request. Any received data is ignored.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcnsu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       inetd(1M), attributes(5), smf(5)

       RFC 867

SunOS 5.10							    23 Aug 2004 						   in.daytimed(1M)
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