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lammps/doc/suffix.txt
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"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
:link(lws,http://lammps.sandia.gov)
:link(ld,Manual.html)
:link(lc,Section_commands.html#comm)
:line
suffix command :h3
[Syntax:]
suffix style :pre
style = {off} or {on} or {opt} or {gpu} or {cuda} :ul
[Examples:]
suffix off
suffix on
suffix gpu :pre
[Description:]
This command allows you to use variants of various styles if they
exist. In that respect it operates the same as the "-suffix
command-line switch"_Section_start.html#2_6. It also has options to
turn off/on any suffix setting made via the command line.
The specified style can be {opt} or {gpu} or {cuda}. These refer to
optional packages that LAMMPS can be built with, as described in "this
section of the manual"_Section_start.html#2_3. The "opt" style
corrsponds to the OPT package, the "gpu" style to the GPU package, and
the "cuda" style to the USER-CUDA package.
These are the variants these packages provide:
OPT = a handful of pair styles, cache-optimized for faster CPU performance
GPU = a handful of pair styles and the PPPM kspace_style, optimized to run on one or more GPUs or multicore CPU/GPU nodes
USER-CUDA = a collection of atom, pair, fix, compute, and intergrate styles, optimized to run on one or more NVIDIA GPUs :ul
As an example, all of the packages provide a "pair_style
lj/cut"_pair_lj.html variant, with style names lj/cut/opt or
lj/cut/gpu or lj/cut/cuda. A variant styles can be specified
explicitly in your input script, e.g. pair_style lj/cut/gpu. If the
suffix command is used with the appropriate style, you do not need to
modify your input script. The specified suffix (opt,gpu,cuda) is
automatically appended whenever your input script command creates a
new "atom"_atom_style.html, "pair"_pair_style.html, "fix"_fix.html,
"compute"_compute.html, or "integrate"_run_style.html style. If the
variant version does not exist, the standard version is created.
If the specified style is {off}, then any previously specified suffix
is temporarily disabled, whether it was specified by a command-line
switch or a previous suffix command. If the specified style is {on},
a disabled suffix is turned back on. The use of these 2 commands lets
your input script use a standard LAMMPS style (i.e. a non-accelerated
variant), which can be useful for testing or benchmarking purposes.
Of course this is also possible by not using any suffix commands, and
explictly appending or not appending the suffix to the relevant
commands in your input script.
[Restrictions:] none
[Related commands:]
"Command-line switch -suffix"_Section_start.html#2_6
[Default:] none
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