Open MPI logo

Open MPI Development Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Development mailing list

Subject: Re: [OMPI devel] help-mpi-btl-openib.txt needs updating with real btl_openib_ib_min_rnr_timer and btl_openib_ib_timeout defaults
From: Chris Samuel (samuel_at_[hidden])
Date: 2012-03-12 19:25:33


On Tuesday 13 March 2012 10:06:43 Chris Samuel wrote:

> Those don't match the values compiled into OMPI 1.4.5:
>
> ompi_info -a | egrep
> 'btl_openib_ib_min_rnr_timer|btl_openib_ib_timeout' MCA btl:
> parameter "btl_openib_ib_min_rnr_timer" (current value: "25", data
> source: default value)
> MCA btl: parameter "btl_openib_ib_timeout" (current value: "20",
> data source: default value)

Wrong command line, sigh..

# ompi_info -a | egrep 'MCA.*(btl_openib_ib_retry_count|btl_openib_ib_timeout)'
                 MCA btl: parameter "btl_openib_ib_timeout" (current value: "20", data source: default value)
                 MCA btl: parameter "btl_openib_ib_retry_count" (current value: "7", data source: default value)

Even more oddly, the second run of the users job did print
that 7 and 20 as the defaults.

I suspect this is likely the result of the user accidentally
using an earlier version of OMPI, not 1.4.5, for his first run.

Sorry for the noise!

cheers,
Chris

-- 
   Christopher Samuel - Senior Systems Administrator
 VLSCI - Victorian Life Sciences Computation Initiative
 Email: samuel_at_[hidden] Phone: +61 (0)3 903 55545
         http://www.vlsci.unimelb.edu.au/