ICODE-ADC/lammps
4
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

change proc count to color for MPI_Comm_split

Browse Source
This commit is contained in:
Steven J. Plimpton
2018-08-02 14:47:20 -06:00
parent b2c75cc0b9
commit b2d1332d46
3 changed files with 32 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
doc/src/Section_start.txt
View File

@ -1352,24 +1352,27 @@ specified file is "none", then no log files are created. Using a
"log"_log.html command in the input script will override this setting.
Option -plog will override the name of the partition log files file.N.
-mpi P :pre
-mpi color :pre
If used, this must be the first command-line argument after the LAMMPS
executable name. It is only used when running LAMMPS in client/server
mode with the "mpi/one" mode of messaging provided by the
"message"_message.html command and the CSlib library LAMMPS links with
from the lib/message directory. See the "message"_message.html
command for more details
In the mpi/one mode of messaging, both executables (the client and the
server) are launched by one mpirun command. P should be specified as
the number of processors (MPI tasks) the first executable is running
on (could be the client or the server code).
This information is required so that both codes can shrink the
MPI_COMM_WORLD communicator they are part of to the subset of
executable name. It is only used when LAMMPS is launched by an mpirun
command which also launches another executable(s) (the other
executable could be LAMMPS as well) at the same time. The color is an
integer value which should be different for each executable (another
application may set this value in a different way). LAMMPS and the
other executable(s) perform an MPI_Comm_split() with their own colors
to shrink the MPI_COMM_WORLD communication to be the subset of
processors they are actually running on.
Currently, this is only used in LAMMPS to perform client/server
messaging with another application. LAMMPS can act as either a client
or server (or both).
Specifically, this refers to the "mpi/one" mode of messaging provided
by the "message"_message.html command and the CSlib library LAMMPS
links with from the lib/message directory. See the
"message"_message.html command for more details.
-nocite :pre
Disable writing the log.cite file which is normally written to list