11-12-2008
Think carefully about what sort of problems you want to solve, e.g.
parallel computation or task farming?
If the former, then are the communications latency-bound or bandwidth-bound? Are collective communications important? Will you need full switching for remote comms, or just nearest-neighbour?
CPU-bound or memory-bound or IO-bound?
These factors are not necessarily mutually exclusive and Inevitably there are trade-offs, but one size does not fit all.
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LEARN ABOUT DEBIAN
hwloc-ps
HWLOC-PS(1) hwloc HWLOC-PS(1)
NAME
hwloc-ps - List currently-running processes 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.
--whole-system
Do not consider administration limitations.
DESCRIPTION
By default, hwloc-ps lists only those currently-running processes that are bound; it displays their their identifier, command-line and
binding. The binding may be reported as objects or cpusets. By default, process bindings are restricted to the currently available topol-
ogy. 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 dis-
tributed 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.
SEE ALSO
hwloc(7), lstopo(1), hwloc-calc(1), hwloc-distrib(1)
1.4.1 Feb 27, 2012 HWLOC-PS(1)