Re: math.ct failure

From: Peter Elias (
Date: Fri May 22 2009 - 06:21:07 PDT

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       I apologize for my late answer; I had some troubles running X after 
    upgrading to Xorg 1.5 ...
       I am running the latest gentoo-patched kernel 
    (linux-2.6.28-gentoo-r5), and NOT running Xen (nor any other 
    virtualization software).
       Is there any chance that the failure of math.ct test signalizes some 
    hardware problem?
       There is one thing I should probably try: when I have installed 
    Gentoo, I have downloaded wrong stage3 tarball, so now I have CHOST set 
    to i486-pc-linux-gnu (instead of i686-pc-linux-gnu). Anyway, I have then 
    compiled everything with -march=athlon option. As I have learned, a 
    change of CHOST leads to some (possibly lot of) recompiling. I do not 
    know what exactly will the change of CHOST do, but who knows...
    Eric Roman wrote:
    > Can you please let us know which kernel you're running?
    > Eric
    > On Thu, May 14, 2009 at 07:43:02AM -0700, Paul Hargrove wrote:
    >> Peter,
    >>  The list address is checkpoint_at_lbl_dot_gov (I've cc:ed this reply and set 
    >> Reply-To)
    >>  If you are seeing this failure, then I would NOT proceed with using 
    >> BLCR.  We should figure out the source of the failure.
    >>  Given the things we've been through in the past, my only guess is that 
    >> you are using Xen with a version older than 3.1.2.  If that is the case, 
    >> the bug is actaully in Xen nor BLCR and you will need to upgrade Xen.  
    >> If that is not the case, let us know and we'll see if we can figure out 
    >> the source of the problem.
    >> -Paul
    >> Peter Elias wrote:
    >>>  Dear Paul H. Hargrove!
    >>>  I apologize for sending this e-mail to your personal address. I 
    >>> planned to send it to the checkpoint mailing list (archives are at 
    >>>, but I couldn't find list's address.
    >>>  I am trying to compile and run blcr-0.8.1 on my machine (Gentoo 
    >>> Linux, AMD Athlon CPU). Compilation went without errors and from all 
    >>> tests only one has failed:
    >>> .../blcr-0.8.1/builddir/tests/.libs/lt-math[31579]: file " 
    >>> ../../tests/math.c", line 54, in math_callback: FP restore failure nan 
    >>> != 38842.2
    >>> cr_poll_request() failed: Restart aborted: restart cancelled and job 
    >>> killed
    >>> FAIL: math.ct
    >>>  Shall I install and use blcr? I want to save and then repeatedly 
    >>> restore some ocaml sessions.
    >>>  With best regards,
    >>> Peter Elias
    >> -- 
    >> Paul H. Hargrove                          PHHargrove_at_lbl_dot_gov
    >> Future Technologies Group                 Tel: +1-510-495-2352
    >> HPC Research Department                   Fax: +1-510-486-6900
    >> Lawrence Berkeley National Laboratory     

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