Berkeley Lab Checkpoint/Restart
May 2008
blcr-util
Userspace tools to Checkpoint and Restart Linux processes
NAME
cr_run - runs a subprocess with checkpoint library loaded.
SYNOPSIS
cr_run [OPTIONS] COMMAND [ARGS]
DESCRIPTION
cr_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.
OPTIONS
| -?,--help | |
| print a usage message and exit. | |
| --version | |
| print version information and exit. | |
| -- | ends options processing. |
| --omit | causes executed process(es) to be omitted (rather than included) in any checkpoint taken. |
| --run | overrides any occurance of --omit earlier in the options (restoring the default behavior). |
BUGS
Because cr_run relies on the "LD_PRELOAD" environment variable, it is ineffective for statically-linked executables, and for setuid/gid programs.
AUTHORS
Jason Duell, Paul Hargrove, and Eric Roman, Lawrence Berkeley National Laboratory.
REPORTING BUGS
Bug reports may be filed on the web at http://mantis.lbl.gov/bugzilla.
