time(1) - NetBSD Manual Pages

TIME(1)                 NetBSD General Commands Manual                 TIME(1)


NAME
time -- time command execution
SYNOPSIS
time [-clp] utility [argument ...]
DESCRIPTION
The time utility executes and times utility. After the utility finishes, time writes the total time elapsed, the time consumed by system overhead, and the time used to execute utility to the standard error stream. Times are reported in seconds. Available options: -c Displays the default csh(1) summary format. -l Lists resource utilization information. The contents of the utility process' rusage structure are printed, see below. -p The output is formatted as specified by IEEE Std 1003.2-1992 (``POSIX.2''). Some shells, such as csh(1) and ksh(1), have their own and syntactically different builtin version of time. The utility described here is avail- able as /usr/bin/time to users of these shells. Resource Utilization If the -l option is given, the following resource usage informations are displayed in addition to the timing information: maximum resident set size average shared memory size average unshared data size average unshared stack size page reclaims page faults swaps block input operations block output operations messages sent messages received signals received voluntary context switches involuntary context switches
EXIT STATUS
The time utility exits with one of the following values: 1-125 An error occurred in the time utility. 126 The utility was found but could not be invoked. 127 The utility could not be found. Otherwise, the exit status of time will be that of utility.
FILES
<sys/resource.h>
SEE ALSO
csh(1), ksh(1), getrusage(2)
STANDARDS
The time utility conforms to IEEE Std 1003.2-1992 (``POSIX.2'').
BUGS
The granularity of seconds on microprocessors is crude and can result in times being reported for CPU usage which are too large by a second. NetBSD 5.2.3 January 24, 2009 NetBSD 5.2.3

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