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<HTML>
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<CENTER><A HREF = "http://lammps.sandia.gov">LAMMPS WWW Site</A> - <A HREF = "Manual.html">LAMMPS Documentation</A> - <A HREF = "Section_commands.html#comm">LAMMPS Commands</A>
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</CENTER>
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<HR>
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<H3>accelerator command
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</H3>
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<P><B>Syntax:</B>
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</P>
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<PRE>accelerator style args
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</PRE>
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<UL><LI>style = <I>off</I> or <I>on</I> or <I>cuda</I>
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<LI>args = 0 or more args specific to the style
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<PRE> <I>off</I> args = none
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<I>on</I> args = none
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<I>cuda</I> args = to be determined
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</PRE>
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</UL>
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<P><B>Examples:</B>
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</P>
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<PRE>accelerator off
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accelerator on
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accelerator cuda blah
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</PRE>
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<P><B>Description:</B>
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</P>
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<P>Alter settings for use of accelerated versions of various styles.
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LAMMPS can be built with optional packages which provide accelerated
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versions of specific <A HREF = "atom_style.html">atom</A>, <A HREF = "pair_style.html">pair</A>,
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<A HREF = "fix.html">fix</A>, <A HREF = "compute.html">compute</A>, and <A HREF = "run_style.html">integrate</A>
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styles.
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</P>
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<P>These are the relevant packages:
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</P>
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<UL><LI>OPT = a handful of pair styles, cache-optimized for faster CPU performance
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<LI>GPU = a handful of pair styles and the PPPM kspace_style, optimized to run on one or more GPUs or multicore CPU/GPU nodes
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<LI>USER-CUDA = a collection of atom, pair, fix, compute, and intergrate styles, optimized to run on one or more NVIDIA GPUs
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</UL>
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<P>See <A HREF = "Section_start.html#2_3">this section</A> of the manual for
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instructions on how to build LAMMPS with any of these packages.
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</P>
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<P>These styles can be specified explicitly in your input script,
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e.g. pair_style lj/cut/gpu. If the -accelerator command-line switch
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is used, you do not need to modify your input script, as discussed in
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<A HREF = "Section_start.html#2_6">this section</A> of the manual. The command-line
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suffix (opt,gpu,cuda) is automatically appended when the style is
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created for atom, pair, fix, compute, and integrate styles. If an
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accelerated version does not exist, the standard version is created.
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</P>
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<P>If the -accelerator command-line switch is used, you may wish to
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disable it for one or more input script commands, so that the
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accelerated version of the style is not used, but rather the standard
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version. This can be useful for performance testing or debugging.
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</P>
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<P>The <I>off</I> style allows you to do this. The effect of the -accelerator
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command-line switch is effectively turned off until another
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accelerator command with the <I>on</I> style is used. The <I>on</I> style can
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only be used if the -accelerator command-line switch was used.
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</P>
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<P>The <I>cuda</I> style invokes options associated with the use of the
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USER-CUDA package. These will be described when the USER-CUDA package
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is released with LAMMPS.
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</P>
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<P><B>Restrictions:</B>
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</P>
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<P>This cuda style can only be invoked if LAMMPS was built with the
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USER-CUDA package. See the <A HREF = "Section_start.html#2_3">Making LAMMPS</A>
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section for more info.
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</P>
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<P>Obviously, you must have GPU hardware and associated software to
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build LAMMPS with GPU support.
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</P>
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<P><B>Related commands:</B>
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</P>
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<P><A HREF = "fix_gpu.html">fix gpu</A>
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</P>
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<P><B>Default:</B> none
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</P>
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</HTML>
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@ -0,0 +1,80 @@
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"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
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:link(lws,http://lammps.sandia.gov)
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:link(ld,Manual.html)
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:link(lc,Section_commands.html#comm)
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:line
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accelerator command :h3
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[Syntax:]
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accelerator style args :pre
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style = {off} or {on} or {cuda} :ulb,l
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args = 0 or more args specific to the style :l
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{off} args = none
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{on} args = none
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{cuda} args = to be determined :pre
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:ule
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[Examples:]
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accelerator off
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accelerator on
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accelerator cuda blah :pre
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[Description:]
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Alter settings for use of accelerated versions of various styles.
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LAMMPS can be built with optional packages which provide accelerated
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versions of specific "atom"_atom_style.html, "pair"_pair_style.html,
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"fix"_fix.html, "compute"_compute.html, and "integrate"_run_style.html
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styles.
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These are the relevant packages:
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OPT = a handful of pair styles, cache-optimized for faster CPU performance
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GPU = a handful of pair styles and the PPPM kspace_style, optimized to run on one or more GPUs or multicore CPU/GPU nodes
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USER-CUDA = a collection of atom, pair, fix, compute, and intergrate styles, optimized to run on one or more NVIDIA GPUs :ul
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|
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See "this section"_Section_start.html#2_3 of the manual for
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instructions on how to build LAMMPS with any of these packages.
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These styles can be specified explicitly in your input script,
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e.g. pair_style lj/cut/gpu. If the -accelerator command-line switch
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is used, you do not need to modify your input script, as discussed in
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"this section"_Section_start.html#2_6 of the manual. The command-line
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suffix (opt,gpu,cuda) is automatically appended when the style is
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created for atom, pair, fix, compute, and integrate styles. If an
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accelerated version does not exist, the standard version is created.
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If the -accelerator command-line switch is used, you may wish to
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disable it for one or more input script commands, so that the
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accelerated version of the style is not used, but rather the standard
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version. This can be useful for performance testing or debugging.
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The {off} style allows you to do this. The effect of the -accelerator
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command-line switch is effectively turned off until another
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accelerator command with the {on} style is used. The {on} style can
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only be used if the -accelerator command-line switch was used.
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The {cuda} style invokes options associated with the use of the
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USER-CUDA package. These will be described when the USER-CUDA package
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is released with LAMMPS.
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[Restrictions:]
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This cuda style can only be invoked if LAMMPS was built with the
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USER-CUDA package. See the "Making LAMMPS"_Section_start.html#2_3
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section for more info.
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Obviously, you must have GPU hardware and associated software to
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build LAMMPS with GPU support.
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[Related commands:]
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"fix gpu"_fix_gpu.html
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[Default:] none
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