The compilation of an SCASH program is as easy as an C
compilation. An example of a LAPLACE program can be found in
/opt/score/example/scash/laplace.c/laplace_c.c
.
Copy the program and the include file
/opt/score/example/scash/laplace.c/laplace.h
to your work
directory. Make sure the program is saved as laplace_c.c
.
Compile the program as follows:
$ scorecc -scash -o laplace_c laplace_c.c $
Just as a normal C/C++ compiler, the scorecc compiler produces an
executable file, named laplace_c
. The scorecc compiler
accepts most of the compiler options that the C/C++ compiler accepts.
You may invoke the Compute Host Lock Client,
msgb
(1), as follows
to find some free hosts in the cluster:
$ msgb -group pcc &
pcc
is a group defined in the
SCore cluster database,
scorehosts.db
(5).
Invoke the scout
program with the same group
name on which to run your program:
$ scout -g pcc SCOUT: Spawn done. SCOUT: session started $A new shell process is now created as a child of the
scout
program.
If msgb
is running, some or all hosts in the
msgb
window will turn red when the remote processes are
invoked with scout
.
Note that the host which the scout
program
is invoked doesn't have to be one of the hosts of your cluster.
Eventually you can invoke the program:
$ scrun -nodes=4x2,network=myrinet ./laplace_c SCORE: connected (jid=100) <0:0> SCORE: 8 nodes (4x2) ready. ... $You can find other SCASH examples under the
/opt/score/example/scash
directory.
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