Jump to content United States-English
HP.com Home Products and Services Support and Drivers Solutions How to Buy
» Contact HP
More options
HP.com home
HP-UX Reference > S


HP-UX 11i Version 3: February 2007

Technical documentation

» Feedback
Content starts here

 » Table of Contents

 » Index


serialize — force target process to run serially with other processes


serialize command [command_args]

serialize [-t] [-p pid]


The serialize command is used to force the target process to run serially with other processes also marked by this command. The target process can be referred to by pid value, or it can be invoked directly on the command. Once a process has been marked by serialize, the process stays marked until process completion unless serialize is reissued on the serialized process with the -t option. The -t option causes the pid specified with the -p option to return to normal timeshare scheduling algorithms.

This call is used to improve process throughput, since process throughput usually increases for large processes when they are executed serially instead of allowing each program to run for only a short period of time. By running large processes one at a time, the system makes more efficient use of the CPU as well as system memory, since each process does not end up constantly faulting in its working set, to only have the pages stolen when another process starts running. As long as there is enough memory in the system, processes marked by serialize behave no differently from other processes in the system. However, once memory becomes tight, processes marked by serialize are run one at a time with the highest priority processes being run first. Each process will run for a finite interval of time before another serialized process is allowed to run.


serialize supports the following options:


Indicates the process specified by pid should be returned to timeshare scheduling.


Indicates the pid of the target process.

If neither option is specified, serialize is invoked on the command line passed in.


serialize returns the following value:


Successful completion.


Invalid pid specification, nonnumeric entry, or pid specification is that of a special system process.


Could not execute the specified command.


No such process.


Must be root or a member of a group having the SERIALIZE privilege to execute serialize.


serialize fails under the following condition and sets errno (see errno(2)) to the following value:


The pid passed in does not exist.


Use serialize to force a database application to run serially with other processes marked for serialization:

serialize database_app

Force a currently running process with a pid value of 215 to run serially with other processes marked for serialization:

serialize -p 215

Return a process previously marked for serialization to normal timeshare scheduling. The pid of the target process for this example is 174:

serialize -t -p 174


The user has no way of forcing an execution order on serialized processes.


serialize was developed by HP.

Printable version
Privacy statement Using this site means you accept its terms Feedback to webmaster
© 1983-2007 Hewlett-Packard Development Company, L.P.