There's a condition known as busy waiting whereby a process Loops continuously wasting CPU cycles as opposed to the process Going into a wait state. I wonder if sleeping a process wastes CPU cycles as described and if so is there a better implentation of this? -----Original Message----- From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Reber, Simon Sent: Monday, 20 April 2009 9:07 p.m. To: General Red Hat Linux discussion list Subject: RE: Crontab Instead of doing this, Simply build a script that has a content as follow: while [ true ] do script1.sh sleep 30 done It's much simpler and you don't need to run it via cron every minute. But you still can control the script and the start/stop via cron. Cheers, Simon >-----Original Message----- >From: redhat-list-bounces@xxxxxxxxxx >[mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Rohit khaladkar >Sent: Monday, April 20, 2009 10:59 AM >To: General Red Hat Linux discussion list >Subject: Re: Crontab > >I guess you cannot have crontab entry in terms of seconds.But you can >create a script which would repeatedly run your script and give an >interval of 30 seconds. >For eg, create a tmp.sh script which would run your desired script (say >script1.sh) after every 30 seconds. > >Your tmp.sh script would look like > >#!/bin/sh >script1.sh >sleep 30 >script1.sh >sleep 30 >script1.sh > > >Make an entry in the crontab to execute this script every minute. > >This should solve the purpose. If anyone comes up with a better idea, >feel free to go ahead with that, but this is a workaround, if you are >stuck. > >Thanks! >Rohit Khaladkar. > >On Mon, Apr 20, 2009 at 2:17 PM, ~~~0Pen ~~~ S0uRce ~~~ ><vijay1313@xxxxxxxxx >> wrote: > >> Hi guys, >> Do any one have idea that how can i >configure crontab >> to run a script after every 30 seconds,i know about default >parameters of >> crontab and tried google also,but could not find any thing. >> >> Any suggestion Please !!!! >> >> >> >> -- >> ~~~ 0Pen ~~~ S0uRce ~~~ >> -- >> redhat-list mailing list >> unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe >> https://www.redhat.com/mailman/listinfo/redhat-list >> >-- >redhat-list mailing list >unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe >https://www.redhat.com/mailman/listinfo/redhat-list > -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list ========================================================== For more information on the Television New Zealand Group, visit us online at tvnz.co.nz ========================================================== CAUTION: This e-mail and any attachment(s) contain information that is intended to be read only by the named recipient(s). This information is not to be used or stored by any other person and/or organisation. -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
