[Users] increasing limit of Registerable memory with OFED-3.5-1

[Anton Starikov]

Yep, that one I saw.

But earlier here was long discussion about which of them (log_mtts_per_seg or log_num_mtt ) to use, and conclusion was that log_num_mtt is more preferable as it decrease fragmentation, if I remember correctly.

Anton.

On Jul 25, 2013, at 5:58 PM, Hal Rosenstock <hal.rosenstock at gmail.com> wrote:

> 
> 
> On Wed, Jul 24, 2013 at 8:56 AM, Anton Starikov <ant.starikov at gmail.com> wrote:
> 
> It is connectx-3 (MT27500). I checked driver sources, there is no mentioning of log_num_mtt .
>  
> It's log_mtts_per_seg, log_mtts_per_seg and it's found in
> drivers/net/ethernet/mellanox/mlx4/main.c
>  
> 
> On Jul 24, 2013, at 12:46 PM, Hal Rosenstock <hal.rosenstock at gmail.com> wrote:
> 
> >
> >
> > On Wed, Jul 24, 2013 at 3:31 AM, Anton Starikov <ant.starikov at gmail.com> wrote:
> > Hello,
> >
> >
> > I'm using OFED-3.5-1 with SL-6.4 (I had to do some minor patching to get it working on 2.6.32-358.14.1.el6.x86_64 kernel due to double export of __pskb_copy).
> >
> > OpenMPI give known warning about limit of registrable memory (below). But in current modules there is no "log_num_mtt" parameter to tune.
> >
> > Which HCA are you using ?
> >
> > -- Hal
> >
> >
> > Just in case, My hard and soft limits for maximal locked memory are unlimited.
> >
> > What should be procedure with latest OFED then?
> >
> > Thank you,
> >
> > Anton Starikov
> >
> > ------------------------------------------
> >
> > WARNING: It appears that your OpenFabrics subsystem is configured to only
> > allow registering part of your physical memory.  This can cause MPI jobs to
> > run with erratic performance, hang, and/or crash.
> >
> > This may be caused by your OpenFabrics vendor limiting the amount of
> > physical memory that can be registered.  You should investigate the
> > relevant Linux kernel module parameters that control how much physical
> > memory can be registered, and increase them to allow registering all
> > physical memory on your machine.
> >
> > See this Open MPI FAQ item for more information on these Linux kernel module
> > parameters:
> >
> >     http://www.open-mpi.org/faq/?category=openfabrics#ib-locked-pages
> >
> >   Local host:              node1
> >   Registerable memory:     32768 MiB
> >   Total memory:            262098 MiB
> >
> > Your MPI job will continue, but may be behave poorly and/or hang.
> > _______________________________________________
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> > Users at lists.openfabrics.org
> > http://lists.openfabrics.org/cgi-bin/mailman/listinfo/users
> >
> 
>