[mvapich-discuss] mvapich-0.9.6-121 problems

[Sayantan Sur]

Hi,

* On Feb,1 Michael Li<mli at deform.com> wrote :
> Hi,
> I am new to mvapich.
> I've downloaded mvapich-0.9.6-121 and built
> mvapich-0.9.6-121 with PCI-Express and SDR settings
> based on the spec from our hardware vendor Microway.
> 
> I made some changes on make.mvapich.vapi and
> used it to build  mvapich-0.9.6-121, please see
> attached make.mvapich.vapi.
> 
> The driver is
> Mellanox IB Gold Distribution (IBGD) v1.7.0 for Linux
> which comes with the box.

Thanks for your interest in MVAPICH! As you pointed out, there is a
later version of IBGD available (1.8.1) along with firmware updates for
your Mellanox cards. For optimal performance of your cluster, its highly
recommended to upgrade to the latest version of IBGD.

However, from our analysis, that's not the main source of the current
problem you are facing.

> I ran my applications, I got problems as follows:
> 
> (1)
>  $DEFORM3_DIR/mvapich/bin/mpirun -np 2 -hostfile 
> $DEFORM3_DIR/mvapich/share/mach
> ines/hosts.list $DEFORM3_DIR/EXE/DEF_SIM_P4P_INFINIBAND.EXE
> 
> [0] Abort: Null value returned by gethostbyname at line 1549 in file 
> viainit.c
> mpirun: executable version 0 does not match our version 3.

Could you please tell us if the hostnames in `hosts.list' file match
with the /etc/hosts file on each of the target nodes? In addition, does
the result of `hostname' command match that on the `hosts.list'?  We are
suspecting that there might be some networking setup issue like that.

> (2)
>  $DEFORM3_DIR/mvapich/bin/mpirun -np 5 -hostfile 
> $DEFORM3_DIR/mvapich/share/machines/hosts.list 
> $DEFORM3_DIR/EXE/DEF_SIM_P4P_INFINIBAND.EXE
> 
> gethostbyname: No address associated with name

This one might be the same problem as the above.

> (3)
> $DEFORM3_DIR/mvapich/bin/mpirun -np 6 -hostfile 
> $DEFORM3_DIR/mvapich/share/machines/hosts.list 
> $DEFORM3_DIR/EXE/DEF_SIM_P4P_INFINIBAND.EXE
> 
> Permission denied.

I'm not sure why you are getting a "Permission Denied" message. It is
not caused by MVAPICH as such. Could you please the permissions on the
executable?

> I knew that IBGD-1.8.1 is available, but I am not sure
> I should update to it.

If you can, it'll be the best.

Thanks,
Sayantan.


-- 
http://www.cse.ohio-state.edu/~surs