Angel,
Infiniband detection likely fails before checking expanded verbs.
Please compress and post the full configure output
Cheers,
Gilles
On Fri, Feb 18, 2022 at 12:02 AM Angel de Vicente via users <
users@lists.open-mpi.org> wrote:
> Hi,
>
> I'm trying to compile the latest OpenMPI version
Thanks Joseph! I think that's a nifty trick! :-)
On Thu, Feb 17, 2022 at 4:57 PM Joseph Schuchart via users <
users@lists.open-mpi.org> wrote:
> Hi Niranda,
>
> A pattern I have seen in several places is to allreduce the pair p =
> {-x,x} with MPI_MIN or MPI_MAX. If in the resulting pair p[0] ==
Hi Niranda,
A pattern I have seen in several places is to allreduce the pair p =
{-x,x} with MPI_MIN or MPI_MAX. If in the resulting pair p[0] == -p[1],
then everyone has the same value. If not, at least one rank had a
different value. Example:
```
bool is_same(int x) {
int p[2];
p[0] =
Hi all,
Say I have some int `x`. I want to check if all MPI ranks get the same
value for `x`. What's a good way to achieve this using MPI collectives?
The simplest I could think of is, broadcast rank0's `x`, do the comparison,
and allreduce-LAND the comparison result. This requires two collective
Hi,
I'm trying to compile the latest OpenMPI version with Infiniband support
in our local cluster, but didn't get very far (since I'm installing this
via Spack, I also asked in their support group).
I'm doing the installation via Spack, which is issuing the following
.configure step (see the opti
I would start at a lower level. Clear your error counters then run some
fabric over the network, maybe using an IMB or OSU benchmark.
Then look to see if any ports are very noisy - that usually indicates a
cable needing a reseat or replacement.
Now start at a low level. Run IMB or OSU bandwidth o
