YIELD(9) Driver Basics YIELD(9)NAME
yield - yield the current processor to other threads.
SYNOPSIS
void __sched yield(void);
ARGUMENTS
void
no arguments
DESCRIPTION
Do not ever use this function, there's a 99% chance you're doing it wrong.
The scheduler is at all times free to pick the calling task as the most eligible task to run, if removing the yield call from your code
breaks it, its already broken.
TYPICAL BROKEN USAGE IS
while (!event) yield;
where one assumes that yield will let 'the other' process run that will make event true. If the current task is a SCHED_FIFO task that will
never happen. Never use yield as a progress guarantee!!
If you want to use yield to wait for something, use wait_event. If you want to use yield to be 'nice' for others, use cond_resched. If you
still want to use yield, do not!
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 YIELD(9)
Dear all,
In a bash script, I grep a filename from an UTF8 encoded file:
LIST=`grep ^source $FILE | tr "\t" " " | cut -d " " -f 2 | sed -e 's,~,\$HOME,g'`
The result is
# echo $LIST
$HOME/.mail_aliases_seminaire_MMMG
Then I try to access it:
#ls $LIST
ls: cannot access... (3 Replies)
I'm trying to execute something like this:
exec perl -i -pe 's/\015/\012/g' '${file}'
in my expect script and I get:
error "invalid command name \"perl\".
however, if I run
perl -i -pe 's/\015/\012/g' "/Users/Shared/menu-items.txt"
directly in my terminal, it runs fine. I'm an... (4 Replies)
Discussion started by: dpouliot
4 Replies
3. Forum Support Area for Unregistered Users & Account Problems
If one enters a Google search query like
site:unix.com mysql php
and clicks on the resulting link, one gets the message below:
vBulletin Message
No Thread specified. If you followed a valid link, please notify the administrator (2 Replies)
I have two Linux machines, Linux1 and Linux2. They both have two NFS mounts. We'll call them /scratch1 and /scratch2. And they both reside on the same NetApp filer. If I copy a 512Mb file from /scratch1 to /scratch2 while logged on Linux1 it takes 40s. However if I scp this file from... (1 Reply)
Good evening, Im newbie at unix specially with awk
From an scheduler program called Autosys i want to extract some data reading an inputfile that comprises jobs names, then formating the output to columns for example
1.
This is the inputfile:
$ more MapaRep.txt
ds_extra_nikira_usuarios... (18 Replies)
In this script:
#!/bin/bash
# bird
read -p "Enter name of a bird "
REPLY=$REPLY
birdname="duck sparrow hawk"
for i in $birdname
do
if ]
then
echo "Yes, that is a bird."
else
echo "That is not a bird."
fi
done
I get... (9 Replies)