Difference between revisions of "Pid"
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(take out freebsd random pids as these don't work anymore sysctl 0 -> 0) |
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=== Random pids === | === Random pids === | ||
| − | [[OpenBSD]] | + | [[OpenBSD]] chooses a random pid number when a new [[process]] is [[fork]]ed, other systems choose the next sequentially available number, and when the maximum pid number is reached the number will wrap around back to the beginning. This means that pids are recycled and on a busy system it may not take long for a new process to take the pid of another process that just ended. |
Revision as of 11:53, 16 July 2010
A pid is the process identification number. Special pids are swapper (0) and init (1).
Random pids
OpenBSD chooses a random pid number when a new process is forked, other systems choose the next sequentially available number, and when the maximum pid number is reached the number will wrap around back to the beginning. This means that pids are recycled and on a busy system it may not take long for a new process to take the pid of another process that just ended.
