TIMEX(1) User Commands TIMEX(1)

NAME

timex - time a command; report process data and system activity

SYNOPSIS

timex [-o] [-p [-fhkmrt]] [-s] command

DESCRIPTION

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 be reported.


The output of timex is written on standard error.

OPTIONS

The following options are supported:

-o
Report the total number of blocks read or written and total
characters transferred by command and all its children. This
option works only if the process accounting software is
installed.


-p
List process accounting records for command and all its
children. This option works only if the process accounting
software is installed. Suboptions f, h, k, m, r, and t modify
the data items reported. The options are as follows:

-f
Print the fork(2)/ exec(2) 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.


-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.

EXAMPLES

Example 1: Examples of timex.

A simple example:


example% timex -ops sleep 60


A terminal session of arbitrary complexity can be measured by timing
a sub-shell:


example% timex -opskmt sh
session commands
EOT

SEE ALSO

sar(1), time(1), exec(2), fork(2), times(2), attributes(7)

NOTES

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.

September 14, 1992 TIMEX(1)