Re: Why do I get the error "cri_syscall(CR_OP_RSTRT_PROCS):Invalid arguments"

From: Paul H. Hargrove (PHHargrove_at_lbl_dot_gov)
Date: Mon Jan 28 2008 - 11:14:34 PST

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      Most of the time, EINVAL from the restart operation means that the 
    checkpoint context file appears invalid, either because i contains 
    unexpected data or because ti is truncated.  Based on what you describe, 
    you are sending the checkpoint output to a filedescriptor via 
    "cr_checkpoint -F" (as opposed to "-f").  So one possibility is that you 
    may simply need to close the file before the parent exits (immediately 
    after cr_poll_checkpoint() is a good place).  It is also possible that 
    the file was open in the original program and some data other than the 
    checkpoint was written to it.
      You should check your system logs (/var/log/message or dmesg) to see 
    what information the kernel printed when the CR_RSTRT_PROCS call 
    failed.  That may help narrow down the source of the problem.
    Locus Jackson wrote:
    > Hi,
    > I come across this problem when I restart my program.
    > I use system("cr_checkpoint -F fildes")  in my program to set a 
    > checkpoint,but when I use execlp("cr_restart filename")
    > to restart my program in its child process(wait until parent is 
    > exited),it always tells me that "cri_syscall(CR_RSTRT_PROCS): Invalid 
    > arguments".
    > What does this error mean,and what should I do to solve this error in 
    > order to use execlp("cr_restart filename")  in child process to 
    > rollback to the checkpoint set by system("cr_checkpoint -F fildes")  
    > (fildes: file descriptor of filename).
    > Thank you for your help.
    > Regards
    > Locus.
    > ------------------------------------------------------------------------
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    Paul H. Hargrove                          PHHargrove_at_lbl_dot_gov
    Future Technologies Group
    HPC Research Department                   Tel: +1-510-495-2352
    Lawrence Berkeley National Laboratory     Fax: +1-510-486-6900

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