forked from lijiext/lammps
60 lines
2.1 KiB
Plaintext
60 lines
2.1 KiB
Plaintext
USER-CUDA library
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Christian Trott, crtrott at sandia.gov
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-------------------------------------------------------------------
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This directory has source files to build a library that LAMMPS links
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against when using the USER-CUDA package.
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This library must be built before LAMMPS is built, so LAMMPS can link
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against it. The build process also write settings into the
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Makefile.lammps file which are used when files in the src/USER-CUDA
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package are compiled.
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Thus if you re-build this library (e.g. for a different precision),
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you MUST re-compile the src/USER-CUDA files as well. You can force
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this to happen by uninstalling, then re-installing the USER-CUDA
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package (make no-user-cuda; make yes-user-cuda) before doing
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a LAMMPS build.
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Build this library in two steps. First type:
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make OPTIONS
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where OPTIONS is one or more of the following settings:
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precision=N to set the precision level
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N = 1 for single precision (default)
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N = 2 for double precision
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N = 3 for positions in double precision
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N = 4 for positions and velocities in double precision
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arch=M to set GPU compute capability
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M = 20 for CC2.0 (GF100/110, e.g. C2050,GTX580,GTX470) (default)
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M = 21 for CC2.1 (GF104/114, e.g. GTX560, GTX460, GTX450)
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M = 13 for CC1.3 (GF200, e.g. C1060, GTX285)
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prec_timer=0/1 to use hi-precision timers
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0 = do not use them (default)
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1 = use these timers
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this is usually only useful for Mac machines
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dbg=0/1 to activate debug mode
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0 = no debug mode (default)
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1 = yes debug mode
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this is only useful for developers
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cufft=1 to determine usage of CUDA FFT library
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0 = no CUFFT support (default)
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in the future other CUDA-enabled FFT libraries might be supported
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This will write settings to the Makefile.defaults file.
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Then type "make" with with no arguments to build the library with the
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new settings.
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After the second make, two files should exist in this directory:
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liblammpscuda.a the library LAMMPS will link against
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Makefile.lammps settings the LAMMPS Makefile will import
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Makefile.lammps is created by the make command and will have settings
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consistent with the OPTIONS you selected. It is used by the LAMMPS
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build, both for compile-time and link-time settings.
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