Sleep less than 1 second


 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers Sleep less than 1 second
# 1  
Old 08-23-2005
Sleep less than 1 second

Does anyone know a way to sleep less than 1 second?
Sometimes when I write scripts that iterates a loop many times it would be
nice to slow things down, but sometimes 1 second is too much.
# 2  
Old 08-23-2005
Quote:
Originally Posted by bjorno
Does anyone know a way to sleep less than 1 second?
Sometimes when I write scripts that iterates a loop many times it would be
nice to slow things down, but sometimes 1 second is too much.
If your system has "usleep" this allows you to sleep in increments of milliseconds instead of seconds.
# 3  
Old 08-23-2005
usleep in C code.
# 4  
Old 08-24-2005
I dont have usleep in my system, which is AIX 5.2.
Is there a compiled version of usleep to download. I think I'm not able
to compile it myself.
# 5  
Old 08-24-2005
If you have perl try:

perl -e 'select(undef,undef,undef,.1)'

That .1 means .1 seconds.
# 6  
Old 08-24-2005
Quote:
Originally Posted by Perderabo
If you have perl try:

perl -e 'select(undef,undef,undef,.1)'

That .1 means .1 seconds.
That works. It is hard to meassure the time but it is definitely less than 1 second.

Thanks a lot.
# 7  
Old 08-24-2005
IT's not hard to measure the elapsed time:
Put Perderabo's code in a script, call it usleep.sh
Code:
time usleep.sh

will give you something like this:
Code:
kcsdev:/home/jmcnama> time usleep.sh

real    0m0.18s
user    0m0.03s
sys     0m0.05s

real is the elapsed time.
 
Login or Register to Ask a Question

Previous Thread | Next Thread

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Sleep while i > 0

Hi, I have a script that runs a process at the beginning and I want to sleep/wait until this process is finished and then continue with the rest of the script. I am trying with this, but it is not working: process=`ps -ef | grep "proc_p01 -c" | grep -v grep | wc -l` if ; do sleep 10 done... (7 Replies)
Discussion started by: apenkov
7 Replies

2. UNIX for Dummies Questions & Answers

Sleep Until Query

Hi, I am a newbie in UNIX please help me develop code for below logic:-- I want my script to implement sleep until a specified time(date doesn't matter) ---------------------------------------- While currenttime > 14:00 and < 18:00 sleep end while run command exit... (9 Replies)
Discussion started by: kiitmale
9 Replies

3. UNIX for Dummies Questions & Answers

sleep infinity

This might be one of the dumbest questions you've got, but please bear with me: I am a UNIX beginner. I had an test today and I was asked the following question: Q. How do you put the terminal into sleep indefinitely? I didn't know the answer, but after I came home, I tried the following... (9 Replies)
Discussion started by: indyxandy
9 Replies

4. Shell Programming and Scripting

Wrapping 'sleep' with my 'resleep' function (Resettable sleep)

This is a very crude attempt in Bash at something that I needed but didn't seem to find in the 'sleep' command. However, I would like to be able to do it without the need for the temp file. Please go easy on me if this is already possible in some other way: How many times have you used the... (5 Replies)
Discussion started by: deckard
5 Replies

5. UNIX for Dummies Questions & Answers

sleep command

Hi All I have a requiremnt to run a script inside another script. here i am pulling the record count from the table in oracle.If record count is greater than 0 the script is executed.The scripts updates the count in the table and again the count is found out and the condition is checked and same... (3 Replies)
Discussion started by: dr46014
3 Replies

6. Shell Programming and Scripting

Sleep Command

I am in need of some help; think I have confused myself. Here is the issue I am faced with. The script log file was fine, the nohup.out file has tens of thousands of lines like illegal use of sleep: sleep seconds So I assume there is something with the seconds calculation in the script... (1 Reply)
Discussion started by: Glove
1 Replies

7. Programming

Sleep() not working

I have a function that quits a program when <ctrl>c is entered as per following code; void quitter (void) { clear (); mvprintw (QUITTER_ROW, QUITTER_COL, "Quitting..."); refresh (); sleep (15); endwin (); exit (1); }This function is called thus; signal (SIGINT, quitter); It... (2 Replies)
Discussion started by: enuenu
2 Replies

8. Shell Programming and Scripting

Sleep under one second

If I want a script to sleep for less than a second, would I use a decimal? In other words, if I wanted my script to sleep for 1/4 of a second, would I say, SLEEP .25 ?? (5 Replies)
Discussion started by: Scoogie
5 Replies

9. UNIX for Dummies Questions & Answers

sleep

what is the purpose of the sleep command? (5 Replies)
Discussion started by: Anna
5 Replies
Login or Register to Ask a Question