Re: Error while using cr_checkpoint on ARM

From: Manish Dwivedi (mdwivedi_at_gmail_dot_com)
Date: Thu Aug 07 2008 - 03:42:39 PDT

  • Next message: Paul H. Hargrove: "Re: Error while using cr_checkpoint on ARM"
    Hi Paul,
    Thanks for the information. We tried compiling it with the enable-debug
    option today. But we didn't get much information in the log (log file is
    attached in the e-mail.
    In between, we have 64 MB RAM in the system, is there a limitation or
    minimum requirement of the RAM in BLCR ?
    Ps: We followed the exactly same process for X86 and it is working fine for
    On Wed, Aug 6, 2008 at 10:58 PM, Paul H. Hargrove <PHHargrove_at_lbl_dot_gov>wrote:
    > Manish,
    >  I am sorry to hear that you are having problems.  From the information you
    > provide below, it is hard to say what the problem is, other than to guess
    > that your ARM system is low on memory.
    >  I am aware of a kernel-side memory leak in blcr-0.7.2, which should be
    > fixed in the 0.7.3 release expected later this week or early next week.  So,
    > I'd like to know if the failure you describe happens on the very first use
    > of cr_checkpoint, or does it happen after BLCR has been used several times
    > (for instance by running "make check")?  If it works for a while and then
    > begins to fail, I'd suspect the known memory leak and suggest that you wait
    > for blcr-0.7.3.
    >  If you are seeing failure on the very first attempt to use blcr, then I
    > suggest that you rebuild blcr with debugging enabled and send me the
    > information dumped to the system logs (run dmesg or see /var/log/messages to
    > find the logs).  To do this, you'll need to start at the beginning of the
    > configure/make/install process and pass the "--enable-debug" option to
    > configure, and then proceed with the rest of the build/install process.  Be
    > sure to "make insmod" (or manually rmmod the old modules and insmod/modprobe
    > the new ones); otherwise the kernel modules from your previous (non-debug)
    > build may still be running.  With the new kernel modules loaded, you should
    > retry your failing command and then look for messages with "blcr: " in them
    > in the system logs.
    >  I also should tell you that there is an ARM-specific mailing list (very
    > low volume) for BLCR that may help you reach other ARM users.  You can find
    > list info and subscribe (required to post) at
    > -Paul
    > Manish Dwivedi wrote:
    >> Hi All,
    >> I am trying to use BLCR for ARM. But when I am trying to use cr_checkpoint
    >> with a hello.c program it is giving me an error as below:
    >> cr_checkpoint --term <pid> (command run)
    >> Checkpoint failed: Cannot allocate memory
    >> I have compiled hello.c in the same kernel as mentioned in the release
    >> notes, I am using blcr-0.7.2.tar.gz for this.
    >> Could anyone help me out resolving this issue so that I can test it. It
    >> works fine for me on a X86 machine.
    >> Regards,
    >> Manish
    > --
    > 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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