Hello Gilles
Per your suggestion, installing libnl3-devel does fixes the mpicc issue,
but there still seems to be another issue down the road: the generated
executable seems to hang. I have tried sm, tcp and openib BTLs, all with
the same result:
[durga@smallMPI ~]$ mpirun -np 2 -H smallMPI,bigMPI -mca btl self,sm
./mpitest <--- Hangs
The source code for the simple test is as follows:
#include <mpi.h>
#include <stdio.h>
#include <unistd.h>
int main(int argc, char** argv)
{
int world_size, world_rank, name_len;
char hostname[MPI_MAX_PROCESSOR_NAME];
MPI_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &world_size);
MPI_Comm_rank(MPI_COMM_WORLD, &world_rank);
MPI_Get_processor_name(hostname, &name_len);
printf("Hello world from processor %s, rank %d out of %d processors\n",
hostname, world_rank, world_size);
MPI_Finalize();
return 0;
}
What do I do now?
Thanks
Durga
We learn from history that we never learn from history.
On Mon, Mar 28, 2016 at 2:37 AM, Gilles Gouaillardet <gil...@rist.or.jp>
wrote:
> Does this happen only with master ?
>
> what does
> ldd mpicc
> says ?
> does it require both libnl and libnl3 ?
>
> libnl3 is used by OpenMPI if libnl3-devel package is installed,
> and this is not the case on your system
>
> a possible root cause is third party libs use libnl3, and the
> reachable/netlink component
> tries to use libnl, in this case, installing libnl3-devel should fix your
> issue
> /* you will need to re-configure after that */
>
> an other possible root cause is some third party libs use libnl and other
> use libnl3,
> and in this case, i am afraid there is no simple workaround.
> if installing libnl3-devel did not solve your issue, you can give a try to
> https://github.com/open-mpi/ompi/pull/1014
> at least, it will abort with an error message that states which lib is
> using libnl and which is using libnl3
>
> i am afraid the only option is to manually disable some components, so
> only one flavor of lib nl is used.
> that can be achieved by adding a .opal_ignore empty file in the dir of the
> components you want to disable.
> /* you will need to rerun autogen.pl after that */
>
> Cheers,
>
> Gilles
>
> On 3/28/2016 3:16 PM, dpchoudh . wrote:
>
> Hello all
>
> The system in question is a CentOS 7 box, that has been running OpenMPI,
> both the master branch and the 1.10.2 release happily until now.
>
> Just now, in order to debug something, I recompiled with the following
> options:
>
> $ ./configure --enable-debug --enable-debug-symbols --disable-dlopen
>
> The compilation and install was successful; however, mpicc now crashes
> like this:
>
> [durga@smallMPI ~]$ mpicc -Wall -Wextra -o mpitest mpitest.c
> mpicc: route/tc.c:973: rtnl_tc_register: Assertion `0' failed.
> Aborted (core dumped)
>
>
> Searching the mailing archive, I found two posts that describe similar
> situations:
>
> https://www.open-mpi.org/community/lists/devel/2015/08/17812.php
> http://www.open-mpi.org/community/lists/users/2015/11/28016.php
>
> However, the solution proposed in these, to disable verbs, is not
> acceptable to me for the following reasons: I am trying to implement a new
> BTL by reverse engineering the openib BTL. I am using a Qlogic HCA for this
> purpose. (Please note that I cannot use PSM as I am writing code for a BTL)
>
> As there any more acceptable solutions for this? Here are the list of nl
> libraries on my box:
>
> [durga@smallMPI ~]$ sudo yum list installed | grep libnl
> libnl.x86_64 1.1.4-3.el7
> @anaconda
> libnl-devel.x86_64 1.1.4-3.el7
> @anaconda
> libnl3.x86_64 3.2.21-10.el7
> @base
> libnl3-cli.x86_64 3.2.21-10.el7
> @base
>
> and uninstalling libnl3 is not an option either: it seems yum wants to
> uninstall around 100 odd other packages because of dependency which will
> essentially render the machine unusable.
>
> Please help!
>
> Thanks in advance
> Durga
>
> We learn from history that we never learn from history.
>
>
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>
>
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