cset-proc - manage processes running in cpusets
cset [cset options] proc [proc options] [args]
cset proc --help
cset proc my_set my_other_set
cset proc --list --set my_set
cset proc --exec my_set /opt/software/my_code --my_opt_1
cset proc --set my_set --exec /opt/software/my_code --my_opt_1
cset proc --move 2442,3000-3200 my_set
cset proc --move --pid=2442,3000-3200 --toset=my_set
cset proc --move --fromset=my_set_1 --toset=my_set_2
cset proc --move --pid=42 --fromset=/group1/myset --toset=/group2/yourset
prints the list of options for this
list processes in the specified cpuset
execute arguments in the specified
-u USER, --user=USER
use this USER to --exec (id or name)
-g GROUP, --group=GROUP
use this GROUP to --exec (id or name)
move specified tasks to specified cpuset; to
move a PIDSPEC to a cpuset, use -m PIDSPEC cpuset; to move all tasks specify
--fromset and --toset
-p PIDSPEC, --pid=PIDSPEC
specify pid or tid specification
if specified, any processes found in the
PIDSPEC to have multiple threads will automatically have all their threads
added to the PIDSPEC (use to move all related threads to a cpuset)
-s CPUSET, --set=CPUSET
specify name of immediate cpuset
-t TOSET, --toset=TOSET
specify name of destination cpuset
-f FROMSET, --fromset=FROMSET
specify name of origination cpuset
move, or include moving, unbound kernel
force all processes and threads to be
prints more detailed output, additive
This command is used to run and manage arbitrary processes on specified cpusets.
It is also used to move pre-existing processes and threads to specified
cpusets. You may note there is no "kill" or "destroy"
option — use the standard OS ^C or kill commands for that.
To list which tasks are running in a particular cpuset, use the --list command.
# cset proc --list --set myset
This command will list all the tasks running in the cpuset called
Processes are created by specifying the path to the executable and specifying
the cpuset that the process is to be created in.
# cset proc --set=blazing_cpuset --exec /usr/bin/fast_code
This command will execute the /usr/bin/fast_code program on the
Note that if your command takes options, then use the traditional "--"
marker to separate cset’s options from your command’s options.
# cset proc --set myset --exec — ls -l
This command will execute "ls -l" on the cpuset called
The PIDSPEC argument taken for the move command is a comma separated list of
PIDs or TIDs. The list can also include brackets of PIDs or TIDs (i.e. tasks)
that are inclusive of the endpoints.
1,2,5 Means processes 1, 2 and 5
1,2,600-700 Means processes 1, 2 and from 600 to 700
The range of PIDs or TIDs does not need to have every position populated. In
other words, for the example above, if there is only one process, say PID 57,
in the range of 50-65, then only that process will be moved.
To move a PIDSPEC to a specific cpuset, you can either specify the PIDSPEC with
--pid and the destination cpuset with --toset, or use the short hand and list
the cpuset name after the PIDSPEC for the --move arguments.
The move command accepts multiple common calling methods. For example, the
following commands are equivalent:
# cset proc --move 2442,3000-3200 reserved_set
# cset proc --move --pid=2442,3000-3200 --toset=reserved_set
These commands move the tasks defined as 2442 and any running task between 3000
and 3200 inclusive of the ends to the cpuset called "reserved_set".
Specifying the --fromset is not necessary since the tasks will be moved to the
destination cpuset no matter which cpuset they are currently running on.
However, if you do specify a cpuset with the --fromset option, then only those
tasks that are both in the PIDSPEC and
are running in the cpuset
specified by --fromset will be moved. I.e., if there is a task running on the
system but not in --fromset that is in PIDSPEC, it will not be moved.
If the --threads switch is used, then the proc command will gather any threads
of belonging to any processes or threads that are specified in the PIDSPEC and
move them. This provides an easy way to move all related threads: just pick
one TID from the set and use the --threads option.
To move all userspace tasks from one cpuset to another, you need to specify the
source and destination cpuset by name.
# cset proc --move --fromset=comp1 --toset=comp42
This command specifies that all processes and threads running on cpuset
"comp1" be moved to cpuset "comp42".
This move command will not move kernel threads unless the -k/--kthread switch is
specified. If it is, then all unbound kernel threads will be added to the
move. Unbound kernel threads are those that can run on any CPU. If you also
the --force switch, then all tasks, kernel or not, bound or not,
will be moved.
Please be cautious with the --force switch, since moving a kernel thread that is
bound to a specific CPU to a cpuset that does not include that CPU can cause a
You must specify unique cpuset names for the both exec and move commands. If a
simple name passed to the --fromset, --toset and --set parameters is unique on
the system then that command executes. However, if there are multiple cpusets
by that name, then you will need to specify which one you mean with a full
path rooted at the base cpuset tree.
For example, suppose you have the following cpuset tree:
Then, to move a process from myset in group1 to yourset in group2, you would
have to issue the following command:
# cset proc --move --pid=50 --fromset=/group1/myset --toset=/group2/yourset
You do not have to worry about where in the Linux filesystem the cpuset
filesystem is mounted. The cset command takes care of that. Any cpusets that
are specified by path (such as above), are done with respect to the root of
the cpuset filesystem.
Cpuset is licensed under the GNU GPL V2 only.
Copyright (c) 2008-2011 Novell Inc.
Written by Alex Tsariounov <firstname.lastname@example.org>.
cset(1), cset-set(1), cset-shield(1)