timex - time a command; report process data and system activity
timex [options] command
The given command is executed; the elapsed time, user time and system
time spent in execution are reported in seconds. Optionally, process
accounting data for the command and all its children can be listed or
summarized, and total system activity during the execution interval can
The output of timex is written on standard error.
-p List process accounting records for command and all its children.
Suboptions f, h, k, m, r, and t modify the data items reported. The
options are as follows:
-f Print the fork/exec flag and system exit status columns
in the output.
-h Instead of mean memory size, show the fraction of total
available CPU time consumed by the process during its
execution. This ``hog factor'' is computed as:
(total CPU time)/(elapsed time)
-k Instead of memory size, show total kcore-minutes.
-m Show mean core size (the default).
-r Show CPU factor (user_time/(system_time + user_time)).
-t Show separate system and user CPU times. The number of
blocks read or written and the number of characters
transferred are always reported.
-o Report the total number of blocks read or written and total
characters transferred by command and all its children.
-s Report total system activity (not just that due to command) that
occurred during the execution interval of command. All the data
items listed in sar(1) are reported.
Process records associated with command are selected from the accounting
file /var/adm/pacct by inference, since process genealogy is not
available. Background processes having the same user-id, terminal-id,
and execution time window will be spuriously included.
A simple example:
timex -ops sleep 60
A terminal session of arbitrary complexity can be measured by timing a
timex -opskmt sh
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