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Subject: Re: [OMPI users] "bind-to l3chace" with r30643 in ticket #4240 dosen't work
From: Ralph Castain (rhc_at_[hidden])
Date: 2014-02-11 20:46:56


Okay, I fixed it. Keep getting caught by a very, very unfortunate design flaw in hwloc that forces you to treat cache's as a special case that requires you to call a different function. So you have to constantly protect function calls into hwloc with "if cache, call this one - else, call that one". REALLY irritating, and it caught us again here.

Should be fixed now in trunk now, set to go over to 1.7.5

Thanks
Ralph

On Feb 11, 2014, at 4:47 PM, tmishima_at_[hidden] wrote:

>
> Hi Ralph,
>
> Since the ticket #4240 has been already set as fixed, I'm sending this
> email to you. ( I don't konw I could add comments to the fixed ticket)
>
> When I tried to bind the process to l3chace, it didn't work like below:
> (the host mangae has the normal topology - not inverted)
>
> [mishima_at_manage openmpi-1.7.4]$ mpirun -np 2 -bind-to l3cache
> -report-bindings ~/mis/openmpi/demos/myprog
> --------------------------------------------------------------------------
> No objects of the specified type were found on at least one node:
>
> Type: Cache
> Node: manage
>
> The map cannot be done as specified.
> --------------------------------------------------------------------------
>
> "-bind-to l1cache/l2cahce" doesn't work as well. At least, I confirmed that
> the openmpi-1.7.4 works with "-bind-to l3cache".
>
> Regards,
> Tetsuya Mishima
>
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