hello. we are porting over from HPUX Shell to Linux.
my default shell is bash so i can no longer schedule to execute a sh script in crontab.
can anyone pls help me out? I searched the site but didnt find any details.
thanks! (1 Reply)
Hi,
I want to write a shell script to make sure all the instruction is executive in flow.
eg.
I want my shell script to run finish this two progress first:
./program input_file_1.txt > input_file_1.txt.out &
./program input_file_2.txt > input_file_2.txt.out &
After then, only run the... (1 Reply)
Hey all,
dmidecode | grep -i CPU
Socket Designation: CPU 0
Version: Intel(R) Xeon(R) CPU E5530 @ 2.40GHz
Socket Designation: CPU 1
Version: Intel(R) Xeon(R) CPU E5530 @ 2.40GHz
cat /proc/cpuinfo | grep -i cpu
cpu family : 6... (24 Replies)
Hi folks,
I want to know how to run two unix programs on two different cpu cores on a 2-core or 4-core or 8-core CPU machine? Extending this how would i run four and eight unix programs on 4-core and 8-core machine respectively?
If this can be done, how to know which program is assigned to... (1 Reply)
Say i have a simple example:
root@server # cat /root/scripts/test.sh
while sleep 5
do
echo "how are u mate" >> /root/scripts/test.log
done
root@server #
Instead of using rc.local to start or another script to check status, I would like make it as daemon, where i can do the following:
... (2 Replies)
Hi Gurus
Can someone help me in explaining the below outputs .
psrinfo -p
4
/usr/sbin/psrinfo -pv
The physical processor has 4 virtual processors (0-3)
SPARC64-VI (portid 1024 impl 0x6 ver 0x93 clock 2150 MHz)
The physical processor has 4 virtual processors (8-11)
SPARC64-VI... (3 Replies)
Hi all.
I have a question about linux command to find number of CPU and Core.
I usually use the command dmidecode -t processor to find cpu and core numbers . On this machine with Red Hat 4. 0 when I try to insert the command is returned the error
-bash: dmidecode: command not found
I try to... (8 Replies)
Hi,
I am trying to gather cpu core details and used this script - Solaris & Scripting: Script - Find cpu - model / type / count / core / thread / speed - Solaris Sparc
For auuditing purpose, we want to know how many cores are being used by Oracle, because oracle license will be charged on... (2 Replies)
Discussion started by: solaris_1977
2 Replies
LEARN ABOUT HPUX
taskset
TASKSET(1) User Commands TASKSET(1)NAME
taskset - set or retrieve a process's CPU affinity
SYNOPSIS
taskset [options] mask command [argument...]
taskset [options] -p [mask] pid
DESCRIPTION
taskset is used to set or retrieve the CPU affinity of a running process given its pid, or to launch a new command with a given CPU affin-
ity. CPU affinity is a scheduler property that "bonds" a process to a given set of CPUs on the system. The Linux scheduler will honor the
given CPU affinity and the process will not run on any other CPUs. Note that the Linux scheduler also supports natural CPU affinity: the
scheduler attempts to keep processes on the same CPU as long as practical for performance reasons. Therefore, forcing a specific CPU
affinity is useful only in certain applications.
The CPU affinity is represented as a bitmask, with the lowest order bit corresponding to the first logical CPU and the highest order bit
corresponding to the last logical CPU. Not all CPUs may exist on a given system but a mask may specify more CPUs than are present. A
retrieved mask will reflect only the bits that correspond to CPUs physically on the system. If an invalid mask is given (i.e., one that
corresponds to no valid CPUs on the current system) an error is returned. The masks may be specified in hexadecimal (with or without a
leading "0x"), or as a CPU list with the --cpu-list option. For example,
0x00000001 is processor #0,
0x00000003 is processors #0 and #1,
0xFFFFFFFF is processors #0 through #31,
32 is processors #1, #4, and #5,
--cpu-list 0-2,6
is processors #0, #1, #2, and #6.
When taskset returns, it is guaranteed that the given program has been scheduled to a legal CPU.
OPTIONS -a, --all-tasks
Set or retrieve the CPU affinity of all the tasks (threads) for a given PID.
-c, --cpu-list
Interpret mask as numerical list of processors instead of a bitmask. Numbers are separated by commas and may include ranges. For
example: 0,5,8-11.
-p, --pid
Operate on an existing PID and do not launch a new task.
-V, --version
Display version information and exit.
-h, --help
Display help text and exit.
USAGE
The default behavior is to run a new command with a given affinity mask:
taskset mask command [arguments]
You can also retrieve the CPU affinity of an existing task:
taskset -p pid
Or set it:
taskset -p mask pid
PERMISSIONS
A user can change the CPU affinity of a process belonging to the same user. A user must possess CAP_SYS_NICE to change the CPU affinity of
a process belonging to another user. A user can retrieve the affinity mask of any process.
SEE ALSO chrt(1), nice(1), renice(1), sched_getaffinity(2), sched_setaffinity(2)
See sched(7) for a description of the Linux scheduling scheme.
AUTHOR
Written by Robert M. Love.
COPYRIGHT
Copyright (C) 2004 Robert M. Love. This is free software; see the source for copying conditions. There is NO warranty; not even for MER-
CHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
AVAILABILITY
The taskset command is part of the util-linux package and is available from https://www.kernel.org/pub/linux/utils/util-linux/.
util-linux August 2014 TASKSET(1)