PTHREAD_YIELD_NP(3) BSD Library Functions Manual PTHREAD_YIELD_NP(3)NAME
pthread_yield_np -- yield control of the current thread
SYNOPSIS
#include <pthread.h>
void
pthread_yield_np(void);
DESCRIPTION
The pthread_yield() causes the running thread to relinquish the processor.
BSD September 18, 2006 BSD
Check Out this Related Man Page
pthread_yield_np(3) Library Functions Manual pthread_yield_np(3)NAME
pthread_yield_np - Notifies the scheduler that the current thread is willing to release its processor to other threads of the same or
higher priority.
LIBRARY
DECthreads POSIX 1003.1c Library (libpthread.so)
SYNOPSIS
#include <pthread.h>
int pthread_yield_np(
void);
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
IEEE Std 1003.1c-1995, POSIX System Application Program Interface
PARAMETERS
None
DESCRIPTION
This routine notifies the thread scheduler that the current thread is willing to release its processor to other threads of equivalent or
greater scheduling precedence. (A thread generally will release its processor to a thread of a greater scheduling precedence without call-
ing this routine.) If no other threads of equivalent or greater scheduling precedence are ready to execute, the thread continues.
This routine can allow knowledge of the details of an application to be used to improve its performance. If a thread does not call
pthread_yield_np(3), other threads may be given the opportunity to run at arbitrary points (possibly even when the interrupted thread holds
a required resource). By making strategic calls to pthread_yield_np(3), other threads may be given the opportunity to run when the
resources are free. This improves performance by reducing contention for the resource.
As a general guideline, consider calling this routine after a thread has released a resource (such as a mutex) which is heavily contended
for by other threads. This can be especially important if the program is running on a uniprocessor machine, or if the thread acquires and
releases the resource inside a tight loop.
Use this routine carefully and sparingly, because misuse can cause unnecessary context switching which will increase overhead and actually
degrade performance. For example, it is counter-productive for a thread to yield while it holds a resource which the threads to which it
is yielding will need. Likewise, it is pointless to yield unless there is likely to be another thread which is ready to run.
RETURN VALUES
If an error condition occurs, this routine returns an integer value indicating the type of error. Possible return values are as follows:
Successful completion. The routine is not supported by this implementation.
ERRORS
None
RELATED INFORMATION
Functions: pthread_attr_setschedparam(3), pthread_setschedparam(3), pthread_getscheduler(3)
Manuals: Guide to DECthreads and Programmer's Guide
delim off
pthread_yield_np(3)
Split large xml into mutiple files and with header and footer in file
tried below
it splits unevenly and also i need help in adding header and footer
command :
csplit -s -k -f my_XML_split.xml extrfile.xml "/<Document>/" {1}
sample xml
<?xml version="1.0" encoding="UTF-8"?><Recipient>... (36 Replies)
Here are instructions to clear the data cache for four browsers, Safari, Chrome, Firefox, Opera. In these examples I'm using MacOS Mojave, but it should be similar for any OS.
You can use these instructions to to clear and reload the cache if you have any issues with the Vue.js UserCP (current... (1 Reply)
Yesterday someone asked me to install TeamViewer and share my Mac screen with them while on a conference call.
I shut down my Mac before sleeping and woke up to some major problem with my 12-core CPU in hyperdrive, and the system activity monitor showed my Mac kernel_task was at 1,200% and the... (30 Replies)
What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file.
# When the shell exits, append to the history file instead of overwriting it
shopt -s histappend (3 Replies)
Hi,
I am attempting to extract the /lib/ paths using sed but it does not appear to work.
./copy_chroot_lib.sh ls echo | sed s#*\(/lib\).*#\1#g
linux-vdso.so.1 (0x00007fff77df1000)
libselinux.so.1 => /lib/x86_64-linux-gnu/libselinux.so.1 (0x00007f28190ac000)
... (8 Replies)
hi,
I am searching for a native tool on MacOS that can increase the resolution of a group of image files whose aspect ratios (file width versus height) vary widely. There are numerous files so I don't wish to do this manually. Someone suggested the sips command with the resampling option but... (5 Replies)
I'm trying to use a bash script for a psych experiment that involves listening to sound files and responding. If I have something like the code below, how can I make sure that a key press is assigned to RESPONSE only after the second echo statement?
for i in 1 2 3; do
echo "Ready?"
sleep 2
... (10 Replies)
Hi all...
Well guys and gals, I jumped in at the deep end and found things that PERL cannot do by default.
Many tricky terminal escape codes are not catered for so I had to create workarounds.
One thing I searched for was this:
Passing perl variable to shell command
AND, @Neo this was... (15 Replies)
Python 3.8.0rc1 released today, 1st October 2019...
Just tried it out testing my AMIGA Python 1.4.0 code inside it and all are working, I can now test to the latest Python incarnation now.
Subjective opinion is that is seems seriously quick on my OSX 10.14.6, latest Mojave update.
Python... (0 Replies)
Hi Guys,
I wrote a collection of bash functions years ago and now need to use them again but
I'm getting some error messages when eval tries to expand the variables names.
I recollect that I used the shopt command to set one of the options but I can't quite
remember the command that I... (8 Replies)
I'm trying to complete a bash script to capture if an external webcam is active in a video conference session. Some users will switch the camera to the built-in MAC camera. When this happens I want to trigger a set of events.
Things tried: reviewed the console.app to look for patterns on when... (6 Replies)