[CentOS] Cant find out MCE reason (CPU 35 BANK 8)

Rafa Griman rafagriman at gmail.com
Tue Mar 22 15:12:28 UTC 2011


Hi :)

On Tue, Mar 22, 2011 at 3:59 PM, Vladimir Budnev
<vladimir.budnev at gmail.com> wrote:

[...]

> But... as i sad we have following slots
>    CPU1    cpu1-a1 cpu1-a2 cpu1-a3 cpu1-b1 cpu1-b2 cpu1-b3
>    CPU2    cpu2-a1 cpu2-a2 cpu2-a3 cpu2-b1 cpu2-b2 cpu2-b3
>
> We have modules placed in such way:
> +------------+------------+------------+------------+------------+------------+------------+
> |              |      V     |     V      |      V     |      V     |
> free    |    free    |
> +------------+------------+------------+------------+------------+------------+------------+
> |   CPU1  |  cpu1-a1| cpu1-a2 | cpu1-a3 | cpu1-b1 | cpu1-b2| cpu1-b3 |
> +------------+------------+------------+------------+------------+------------+------------+
>
>
> +------------+------------+------------+------------+------------+------------+------------+
> |              |      V     |     V      |      V     |      V     |
> free    |    free    |
> +------------+------------+------------+------------+------------+------------+------------+
> |   CPU2  |  cpu2-a1| cpu2-a2 | cpu2-a3 | cpu2-b1 | cpu1-b2| cpu1-b3 |
> +------------+------------+------------+------------+------------+------------+------------+
>
> Definetely there is something with memory banks,becasue replacinbg moudels
> changed the mce messages, but what exactly...or iv interpreted all wrong?


This isn't an optimal setup (performance-wise). You should always
populate complete slots in multiples of 3 to get the full bandwidth.
In your case, you've got cpu1-b[2|3] and cpu2-b[2|3] with no DIMMs so
that would affect your performance.

HTH

   Rafa



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