NAME

       hwloc-ps - List currently-running processes or threads that are bound

SYNOPSIS

       hwloc-ps [options]

OPTIONS

       -a        list  all  processes,  even those that are not bound to any specific part of the
                 machine.

       -p --physical
                 report OS/physical indexes instead of logical indexes

       -l --logical
                 report logical indexes instead of physical/OS indexes (default)

       -c --cpuset
                 show process bindings as cpusets instead of objects.

       -t --threads
                 show threads inside processes.  If -a is given as well, list all threads  within
                 each  process.   Otherwise,  show all threads inside each process where at least
                 one thread is bound.

       -e --get-last-cpu-location
                 Report  the last processors where the process/thread ran.  Note that the  result
                 may  already  be  outdated when reported since the operating system may move the
                 tasks to other processors at any time according to the binding.

       --whole-system
                 Do not consider administration limitations.

       --pid-cmd <cmd>
                 Append the output of the given command to each PID  line.   For  each  displayed
                 process  ID,  execute  the  command <cmd> <pid> and append the first line of its
                 output to the regular hwloc-ps line.

DESCRIPTION

       By default, hwloc-ps lists only those currently-running processes that are bound. If -t is
       given,  processes  that  are  not  bound  but  contain  at least one bound thread are also
       displayed, as well as all their threads.

       hwloc-ps displays process identifier,  command-line  and  binding.   The  binding  may  be
       reported as objects or cpusets.

       By  default,  process bindings are restricted to the currently available topology. If some
       processes are bound to processors that are not available to the current process, they  are
       ignored unless --whole-system is given.

       The  output  is  a  plain  list.  If  you  wish to annotate the hierarchical topology with
       processes so as to see how they are actual distributed on the machine, you might  want  to
       use lstopo --ps instead (which also only shows processes that are bound).

       The -a switch can be used to show all processes, if desired.

EXAMPLES

       If a process is bound, it appears in the default output:

           $ utils/hwloc-ps
           4759  Core:0         myprogram

       If a process is not bound but 3 of his 4 threads are bound, it only appears in the thread-
       aware output:

           $ utils/hwloc-ps

           $ utils/hwloc-ps -t
           4759  Machine:0      myprogram
            4759 Machine:0
            4761 PU:0
            4762 PU:2
            4765 PU:1

       To display the binding of already running MPI processes (launched by Open MPI) and  append
       their MPI rank (in MPI_COMM_WORLD) to each line:

           $ utils/hwloc-ps --pid-cmd myscript
           29093 L1dCache:0     myprogram OMPI_COMM_WORLD_RANK=0
           29094 L1dCache:2     myprogram OMPI_COMM_WORLD_RANK=1
           29095 L1dCache:1     myprogram OMPI_COMM_WORLD_RANK=2
           29096 L1dCache:3     myprogram OMPI_COMM_WORLD_RANK=3

       where myscript is a bash script doing:

           #!/bin/sh
           cat   /proc/$1/environ   2>/dev/null   |   xargs   --null  --max-args=1  echo  |  grep
       OMPI_COMM_WORLD_RANK

SEE ALSO

       hwloc(7), lstopo(1), hwloc-calc(1), hwloc-distrib(1)