Re: LINUX crash analysis

  Are you able to convert those files on a different machine.  I assume you 
don't have a similar machine to test the conversion...

  Does it freeze in the same place each time or different places?  If you 
modify your script to do less than 500, wait a minute and do a few hundred 
more, does it still freeze?

  If I remember correctly, Ubuntu is pre-compiled?  Otherwise, I'd suggest 
recompiling the entire system without optimization.  You could try a 32-bit 
install to see if it has the same problem?

----- Original Message ----- 
From: "Aaron Birenboim" <[email protected]>
To: "New Mexico Linux Users Group Mail List" <[email protected]>; "NMGLUG.org 
mailing list" <[email protected]>
Sent: Wednesday, March 12, 2008 6:53 AM
Subject: [NMLUG] LINUX crash analysis


>I have a new Ubuntu 7.10 EMT64 install that is freezing under a
> heavy-load application.
>
> Does anybody out there know about a way to find out why it is freezing?
> Some sort of kernel profiler and/or debugger?
>
> The "heavy load" is nothing more than a simple script with
> 4000 ImageMagick "convert" commands.... operating on
> 4000/12000 image files in a single folder.
> It usually freezes sometime between frame 500 to 2000 in the list.
>
> I was able to repeat the freeze on an ext3 filesystem, on two
> different SATA disks.  I then converted one of those disks to
> XFS, and was able to repeat the same freeze behavior.
>
> As long as I don't try to process these files... the machine seems
> perfectly stable.
>
> So...  I don't think it is SATA hardware.  (repeated on two disks)
> I don't think it is a filesystem bug. (repeated on two filesystems)
> Any other ideas?
>
> ...  processing long lists of images into videos was one
> of the main reasons this machine was built...
>
>             aaron
>
>
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