NAMEcr_run - runs a subprocess with checkpoint library loaded.
SYNOPSIScr_run [OPTIONS] COMMAND [ARGS]
DESCRIPTIONcr_run takes an arbitrary command and runs it with the "LD_PRELOAD" environment variable set so that an appropriate shared library is loaded at program startup. Such a library must be loaded if you wish to take a checkpoint of the process with cr_checkpoint(1).
cr_run assumes that BLCR's libraries (libcr*.so) can be found in the default library search path or via the "LD_LIBRARY_PATH" environment variable.
You do not need to use cr_run if you explicitly link your application with -lcr (you may also need to modify your linker's search path with a -L directive, depending on the library's location), or if libcr.so or a related library is loaded by other libraries you have linked with (such as a checkpoint-ready MPI library), or by your system's parallel job startup script, etc. Check your system documentation for details.
- print a usage message and exit.
- print version information and exit.
- ends options processing.
- causes executed process(es) to be omitted (rather than included) in any checkpoint taken.
overrides any occurance of
earlier in the options (restoring the default behavior).
BUGSBecause cr_run relies on the "LD_PRELOAD" environment variable, it is ineffective for statically-linked executables, and for setuid/gid programs.
Jason Duell, Paul Hargrove, and Eric Roman, Lawrence Berkeley National Laboratory.
Bug reports may be filed on the web at mantis.lbl.gov/bugzilla.