On Sat, Oct 25, 2003 at 09:44:35AM -0700, Teresa Tao wrote:
> Hi there,
>
> I am working on an real time video playback applicaion on a mips cpu. But
> after my video application play a while like 5 to 10 minutes, a bus error
> happened.
>
> We add some debug meesage in the kernel, so we know that after the do_ade
> function inside the unalign.c, the bus error happens for the opcode lw or sw.
> So my guess is that I have an unaligned memory pointer(not in 4 byte
> boundary).
> But my puzzle is that if I have an unaligned memory pointer, it should happen
> at the first loop I playback, how come it happens after it plays several
> loops?
>
There are many reasons for having bus error, cache, errant pointers,
unstable hardware, or some tricky kernel bugs which happens when
certain conditions happen together.
> Is there a possibility that my application's stack being trashed after a
> while? but I don't have recursive calls inside my application.
Everything is possible. :)
Jun
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