Re: [uml-devel] Memory corruption/errors?

[Peter <peter.repliesignored@rimuhosting.com>]

I don't recall seeing an error where the obs and exp were equal.  I saw 
plenty where they were not equal.

The code is pretty simple:
double observed = a[i];
double expected = (double) i;
if (observed != expected) {
	      printf ("failed at i=%u, k=%u (obs %.18g vs exp %.18g)\n",i, 
k,observed, expected);
};

Maybe it is just some unexpected handling on the != operator with doubles?

Are you seeing cases where obs!=exp?  And difference if you run it on a 
uni-proc server vs. a smp server?

Regards, Peter

Bodo Stroesser wrote:
> Carl wrote:
> 
>> Hi,
>>
>> Running the piece of code from the URL below is generating errors on
>> various UML kernels:
>>
>> http://downloads.rimuhosting.com/memtest.c
>>
>> Kernels tested are: 2.4.27, 2.4.27-bs1, 2.6.9-bb4.
>>
>> Different UML host servers have been tried too, and only UMLs running on
>> SMP (dual Xeon) servers seem to have the problem (P4s with HT are fine).
>>
>> Can anyone else reproduce the errors? Any ideas?
>>
>> Thanks, Carl
Do you see messages like this one

     "failed at i=17240, k=85 (obs 17240 vs exp 17240)"

with obs and exp being equal?


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