[mvapich-discuss] Oversubscription support

[Jonathan Perkins]

When you're running with oversubscription, were you
setting MV2_USE_BLOCKING to 0?  If so, what type of errors were you hitting?

On Mon, Oct 26, 2015 at 10:34 AM Maksym Planeta <
mplaneta at os.inf.tu-dresden.de> wrote:

> Hi,
>
> I'm interested in using MVAPICH library with oversubscription, i.e. with
> more than one rank per core. In version 2.1 oversubscription worked
> until certain limit and then the library was just breaking because of bugs.
>
> So I updated to 2.2a and found out that the new version contains
> additional checks (for example in function mv2_get_assigned_cpu_core),
> which basically forbids to have more than one rank per core.
>
> Could you tell me the reason for that? Have you ever tried  about
> running MVAPICH with oversubscription? And would you at least consider
> the patches for oversubscription support?
>
> --
> Regards,
> Maksym Planeta
>
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