02-10-2009
time
hello everybody!
I wrote a shell script to time a program. the commands are:
time -f "%E real"
how i have to write the above command in order to get the elapsed time in millisecond precision and not in seconds?
thanx in advance
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rtprio(1) General Commands Manual rtprio(1)
NAME
rtprio - execute process with real-time priority
SYNOPSIS
priority command [arguments]
priority
command [arguments]
DESCRIPTION
executes command with a real-time priority, or changes the real-time priority of currently executing process pid. Real-time priorities
range from zero (highest) to 127 (lowest). Real-time processes are not subject to priority degradation, and are all of greater (schedul-
ing) importance than non-real-time processes. See rtprio(2) for more details.
If is specified instead of a real-time priority, executes command with a timeshare (non-real-time) priority, or changes the currently exe-
cuting process pid from a possibly real-time priority to a timeshare priority. The former is useful to spawn a timeshare priority command
from a real-time priority shell.
If is not specified, command is not scheduled, or pid's real-time priority is not changed, if the user is not a member of a group having
access and is not the user with appropriate privileges. When changing the real-time priority of a currently executing process, the effec-
tive user ID of the calling process must be the user with appropriate privileges, or the real or effective user ID must match the real or
saved user ID of the process to be modified.
RETURN VALUE
returns exit status 0 if command is successfully scheduled or if pid's real-time priority is successfully changed, 1 if command is not exe-
cutable or pid does not exist, and 2 if command (pid) lacks real-time capability, or the invoker's effective user ID is not a user who has
appropriate privileges, or the real or effective user or the real or effective user ID does not match the real or saved user ID of the
process being changed.
EXAMPLES
Execute file at a real-time priority of 100:
Set the currently running process pid 24217 to a real-time priority of 40:
AUTHOR
was developed by HP.
SEE ALSO
setprivgrp(1M), getprivgrp(2), rtprio(2).
rtprio(1)