From 5b57d28ffb6e1ef86b50f7d05d977826eae89bfe Mon Sep 17 00:00:00 2001 From: Kiyoshi Aman Date: Fri, 1 Feb 2019 22:55:37 +0000 Subject: initial population --- usr.bin/time/time.1 | 220 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 220 insertions(+) create mode 100644 usr.bin/time/time.1 (limited to 'usr.bin/time/time.1') diff --git a/usr.bin/time/time.1 b/usr.bin/time/time.1 new file mode 100644 index 0000000..3f42310 --- /dev/null +++ b/usr.bin/time/time.1 @@ -0,0 +1,220 @@ +.\" $NetBSD: time.1,v 1.28 2017/07/15 14:40:36 wiz Exp $ +.\" +.\" Copyright (c) 1980, 1991, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" @(#)time.1 8.1 (Berkeley) 6/6/93 +.\" +.Dd July 15, 2017 +.Dt TIME 1 +.Os +.Sh NAME +.Nm time +.Nd time command execution +.Sh SYNOPSIS +.Nm +.Op Fl clp +.Op Fl f Ar fmt +.Ar command +.Op Ar argument ... +.Sh DESCRIPTION +The +.Nm +utility +executes and +times +.Ar command . +After the command finishes, +.Nm +writes the total elapsed time (wall clock time), +.Pq Dq real , +the CPU time spent executing +.Ar command +at user level +.Pq Dq user , +and the CPU time spent executing in the operating system kernel +.Pq Dq sys , +to the standard error stream. +Times are reported in seconds. +.Pp +Available options: +.Bl -tag -width Ds +.It Fl c +Displays information in the format used by default the +.Nm +builtin of +.Xr csh 1 +uses (%Uu %Ss %E %P %X+%Dk %I+%Oio %Fpf+%Ww). +.It Fl f +Specify a time format using the +.Xr csh 1 +.Nm +builtin syntax. +The following sequences may be used in the format string: +.Pp +.Bl -tag -width 4n -compact +.It \&%U +The time the process spent in user mode in cpu seconds. +.It \&%S +The time the process spent in kernel mode in cpu seconds. +.It \&%E +The elapsed (wall clock) time in seconds. +.It \&%P +The CPU percentage computed as (%U + %S) / %E. +.It \&%W +Number of times the process was swapped. +.It \&%X +The average amount in (shared) text space used in Kbytes. +.It \&%D +The average amount in (unshared) data/stack space used in Kbytes. +.It \&%K +The total space used (%X + %D) in Kbytes. +.It \&%M +The maximum memory the process had in use at any time in Kbytes. +.It \&%F +The number of major page faults (page needed to be brought from disk). +.It \&%R +The number of minor page faults. +.It \&%I +The number of input operations. +.It \&%O +The number of output operations. +.It \&%r +The number of socket messages received. +.It \&%s +The number of socket messages sent. +.It \&%k +The number of signals received. +.It \&%w +The number of voluntary context switches (waits). +.It \&%c +The number of involuntary context switches. +.El +.It Fl l +Lists resource utilization information. +The contents of the +.Ar command +process's +.Em rusage +structure are printed; see below. +.It Fl p +The output is formatted as specified by +.St -p1003.2-92 . +.El +.Pp +Some shells, such as +.Xr csh 1 +and +.Xr ksh 1 , +have their own and syntactically different built-in version of +.Nm . +The utility described here +is available as +.Pa /usr/bin/time +to users of these shells. +.Ss Resource Utilization +If the +.Fl l +option is given, the following resource usage +information is displayed +in addition to the timing information: +.Bl -item -offset indent -compact +.It +maximum resident set size +.It +average shared memory size +.It +average unshared data size +.It +average unshared stack size +.It +page reclaims +.It +page faults +.It +swaps +.It +block input operations +.It +block output operations +.It +messages sent +.It +messages received +.It +signals received +.It +voluntary context switches +.It +involuntary context switches +.El +Resource usage is the total for the execution of +.Ar command +and any child processes it spawns, as per +.Xr wait4 2 . +.Sh FILES +.Bl -tag -width Xsys/resource.hX -compact +.It Aq sys/resource.h +.El +.Sh EXIT STATUS +The +.Nm +utility exits with one of the following values: +.Bl -tag -width indent +.It 1-125 +An error occurred in the +.Nm +utility. +.It 126 +The +.Ar command +was found but could not be invoked. +.It 127 +The +.Ar command +could not be found. +.El +.Pp +Otherwise, the exit status of +.Nm +will be that of +.Ar command . +.Sh SEE ALSO +.Xr csh 1 , +.Xr ksh 1 , +.Xr clock_gettime 2 , +.Xr getrusage 2 , +.Xr wait4 2 +.Sh STANDARDS +The +.Nm +utility conforms to +.St -p1003.2-92 . +.Sh 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. -- cgit v1.2.3-70-g09d2