This can be a terrible idea, but this is how you do it.
Logon as root. Then try to set your process to a very high priority, thus avoiding the scheduler.
One way is -- Use the nice command as a workaround. Also: in Linux there are ways to create realtime priority classes for processes. To determine the highest realtime priority you can set programmatically, make use of the sched_get_priority_max function. Also be aware: MAX_USER_RT_PRIO is the priority user space should ever run in. Period. See sched.h
If timing is such a big deal you should consider synchronization primitives: mutexes, semaphores, locking.
If your code is running as root you can use the nice() syscall to accomplish priority changes as well.
Note: If your process is having a problem it can bring the whole system to its knees.
Since you do not seem to know about process priority I would suggest that other mechanisms be tried first, before nice(). Meaning: Because you are asking this question, it would appear you may not be experienced enough to do realtime coding.
:cool:
I need to execute a shell script to do the following:
cat a file
run two back ground processes using the first two values from the file
wait till those background processes finish
run two more background processes using the next two values from the file
wait till those background... (1 Reply)
o
hola..
Tengo un script que se ejecuta bajo una tarea del CronJOb del unix, tengo la version 11 de unix, mi script tiene un ciclo que lee unos archivos .txt luego cada uno de esos archivos debe pasar por un procedimiento almacenado el cual lo tengo almacenado en mi base de datos oracle 10g,... (4 Replies)
Hi,
I am trying to run a simple UNIX command after i successfully executed SFTP command as shown below.
-----------------------------------------
echo 'Step-1'
sftp -vvv -b path
exit
echo 'Step-2'
------------------------------------------
In above script it executes from the 1st... (3 Replies)
Hello all,
I would be happy if any one could help me with a shell script that would determine all the processes running on a Unix server and post a mail if any of the process is not running or aborted.
Thanks in advance
Regards,
pradeep kulkarni.
:mad: (13 Replies)
Hi Experts, we do have a shell script for Unix Solaris, which will kill all the process manullay, it used to work in my previous env, but now it is throwing this error.. could some one please help me to resolve it
This is how we execute the script (and this is the requirement) ... (2 Replies)
Hi,
I was Googling to get info "How OS loads process into its memory to execute?" i mean when i execute ./<exename> , How OS exectes it?
It will be better if i tell my intention,
In my $LOGNAME saveral process are running, among all of these two process are my target process. Basically I... (1 Reply)
get email notification from from system when a process from XXXX user takes longer than 15 min run.Let me know the time estimation for the same.
hi ,any one please tell me , how to write a script to get email notification from system when a process from as mentioned above a xxxx user takes... (1 Reply)
I need to develop a process/daemon which will constantly monitor a file for new entry and execute a command.
for eg, there is a file /var/log/inotify.log
When a new entry like below gets appeneded to this file, execute the command as follows.
/home/user/public_html/bad.php|CREATE
... (2 Replies)
I am writing a script to kick off a process to gather logs on multiple nodes in parallel using "&". These processes create individual log files. Which I would like to filter and convert in CSV format after they are complete. I am facing following issues:
1. Monitor all Processes parallelly.... (5 Replies)
Team,
I have multiple batchjobs running in VM, if I do ps -ef |grep java or tomcat I am getting multiple process list.
How do I get my exact tomcat process running and that is unique? via shell script? (4 Replies)
Discussion started by: Ghanshyam Ratho
4 Replies
LEARN ABOUT OSF1
processor_sets
processor_sets(4) Kernel Interfaces Manual processor_sets(4)NAME
processor_sets - Collections of processors
DESCRIPTION
A processor set is a collection of processors. When a processor set is first created, it does not contain any processors. You can add
processors to a processor set, remove processors from a processor set, and also destroy the processor set. In addition, you can assign
specific processes to a processor set.
When the system is booted, all its processors are assigned to the default processor set. Each processor in a system can be a member of
only one processor set at one time.
In addition, when you create a process, it is assigned to a processor set. Unless you indicate a specific processor set, a process is
assigned to the default processor set. A process can execute only on an processor that is included in the processor set to which the
process is assigned. If you assign a process to an empty processor set, it will not execute until a processor is assigned to the processor
set or until the process is assigned to another processor set.
Use the pset_create command or the create_pset function to create a processor set. When you first create a processor set, it does not con-
tain any processors.
Use the pset_assign_cpu command or the assign_cpu_to_pset function to assign processors to a specific processor set. When you assign a
processor to a specific processor set, the processor is removed from its current processor set.
Use the pset_destroy command or the destroy_pset function to destroy a processor set. Processors that belong to a destroyed processor set
are assigned to the default processor set.
Use the pset_assign_pid command or the assign_pid_to_pset function to assign a process to a specific processor set. In addition, you can
request that a process has exclusive access to a processor set. If a process has exclusive access to a processor set, no other process is
able to use that processor set. If a process has exclusive access to a processor set, that access will be cleared automatically when the
process exits. Note that if a process is already assigned to a processor set, a request for exclusive access to that processor set will be
denied.
Use the pset_info command to display the status of each processor set on the system as well as the status of each processor.
You must be root to create and destroy processor sets and to assign a processor to a processor set. Processor set creation and destruction
and processor assignments to processor sets are logged in the /var/adm/wtmp file.
FILES
/var/adm/wtmp
RELATED INFORMATION
Commands: pset_create(1), pset_destroy(1), pset_info(1), pset_assign_pid(1), pset_assign_cpu(1), runon(1), psrinfo(1), psradm(8)
Functions: assign_pid_to_pset(3), assign_cpu_to_pset(3), create_pset(3), destroy_pset(3) delim off
processor_sets(4)