[ofa-general] max_mr limit

[Rajouri Jammu]

I think it's Arabel.

Both drivers are loaded (ib_mthca and mlx4_core). How do I tell which
driver's settings I should modify?

What will be the max_mr value if log_num_mpt = 20?

On Tue, Mar 11, 2008 at 6:26 AM, Tziporet Koren <tziporet at dev.mellanox.co.il>
wrote:

> Rajouri Jammu wrote:
> > The HCA I'm using reports max_mr = 131056.
> >
> > Our application needs large number of memory regions, much more than
> > the 128K limit.
> >
> > Is there a way to increase this limit?
> > I suppose it's bound by memory on the HCA. Is there an HCA that can
> > use host memory to increase the number of MRs that can be supported.
> >
> Which HCA you are using?
> In mlx4 and mthca drivers there are modules parameters to change the
> amount of memory regions (by enlarging the number of MPTs and MTTs)
>
> for example:
> mlx4:
>   log_num_mpt:         log maximum number of memory protection table
> entries per HCA (default is 17; max is 20)
>   log_num_mtt:         log maximum number of memory translation table
> segments per HCA (default is 20; max is 20)
>
> mthca:
>  num_mpt               - maximum number of memory protection table
> entries per HCA (int)
>  num_mtt               - maximum number of memory translation table
> segments per HCA (int)
>
> Tziporet
>
>
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