.\" -*- nroff -*-
.\" Copyright © 2010-2018 Inria.  All rights reserved.
.\" Copyright © 2009-2010 Cisco Systems, Inc.  All rights reserved.
.\" See COPYING in top-level directory.
.TH HWLOC-PS "1" "Dec 13, 2018" "1.11.12" "hwloc"
.SH NAME
hwloc-ps \- List currently-running processes or threads that are bound
.
.\" **************************
.\"    Synopsis Section
.\" **************************
.SH SYNOPSIS
.
.B hwloc-ps
[\fIoptions\fR]
.
.\" **************************
.\"    Options Section
.\" **************************
.SH OPTIONS
.
.TP 10
\fB\-a\fR
List all processes, even those that are not bound to any
specific part of the machine.
.TP
\fB\-\-pid <pid>\fR
Only show process of PID \fI<pid>\fR,
even if it is not bound to any specific part of the machine.
.TP
\fB\-\-name <name>\fR
Only show processes whose name contains \fI<name>\fR,
even if they are not bound to any specific part of the machine.
This is not supported on all operating systems.
.TP
\fB\-p\fR \fB\-\-physical\fR
Report OS/physical indexes instead of logical indexes
.TP
\fB\-l\fR \fB\-\-logical\fR
Report logical indexes instead of physical/OS indexes (default)
.TP
\fB\-c\fR \fB\-\-cpuset\fR
Show process bindings as cpusets instead of objects.
.TP
\fB\-t\fR \fB\-\-threads\fR
Show threads inside processes.
If \fB\-a\fR is given as well, list all threads within each process.
Otherwise, show all threads inside each process where at least one
thread is bound.
This is currently only supported on Linux.
.TP
\fB\-e\fR \fB\-\-get\-last\-cpu\-location\fR
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Note that the result may already be outdated when reported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.
.TP
\fB\-\-whole\-system\fR
Do not consider administration limitations.
.TP
\fB\-\-pid\-cmd <cmd>\fR
Append the output of the given command to each PID line.
For each displayed process ID, execute the command \fI<cmd> <pid>\fR
and append \fBthe first line\fR of its output to the regular hwloc-ps
line.
.
.\" **************************
.\"    Description Section
.\" **************************
.SH DESCRIPTION
.
By default, hwloc-ps lists only those currently-running processes that
are bound. If \fB-t\fR is given, processes that are not bound but contain
at least one bound thread are also displayed, as well as all their threads.
.
.PP
hwloc-ps displays process identifier, command-line and
binding.  The binding may be reported as objects or cpusets.
.
.PP
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 \fB\-\-whole\-system\fR
is given.
.
.PP
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).
.
.PP
The
.I -a
switch can be used to show
.I all
processes, if desired.
.
.\" **************************
.\"    Examples Section
.\" **************************
.SH EXAMPLES
.PP
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 (or if explicitly selected):

    $ utils/hwloc-ps

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

    $ utils/hwloc-ps --pid 4759
    4759	Machine:0		myprogram

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 \fBmyscript\fR 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 section
.\" **************************
.SH SEE ALSO
.
.ft R
hwloc(7), lstopo(1), hwloc-calc(1), hwloc-distrib(1)
.sp