[ECOS] Re: Problems with "Scheduler lock not zero"

Jürgen Lambrecht Jurgen.Lambrecht@tiscali.be
Fri Jul 6 08:55:00 GMT 2007

Øyvind Harboe wrote:

> On 11/7/06, Andrew Lunn <andrew@lunn.ch> wrote:
>> Hi Folks
>> I think it is unlikley this is your problem, but i will mention it
>> anyway. I once had an assertion failure in the same place. It was
>> caused by a thread exiting with the scheduler locked.
>> Another thing to check is do you have an spurious interrupts. There
>> has been problems on the ARM platform not correctly dealing with
>> this. Since spurious interrupts generally means broken hardware, its
>> not the easiest thing to test and debug.

Is this not a solution for this?
> After fixing a bug in our DDR controller(implemented in FPGA), we can
> no longer reproduce the problem..... Crossing fingers.... :-)
> It is hard enough to tell how a system behaves when it works, but to
> explain what possible a *nearly* working DDR controller could result
> in, is pretty much impossible.
> The main symptom of our broken DDR controller was that the whole
> system locked up. We'll run some more overnight testing, but it looks
> like the  "Scheduler lock not zero" assert failure was just another,
> albeit unfatohmable, manifestation of that same problem.

Jürgen Lambrecht
Diksmuidse Heerweg 338
8200 Sint-Andries
Tel: +32 (0)50 842901
GSM: +32 (0)476 313389

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