[mvapich-discuss] Segfault and corruption with RPUT/RGET

[Jonathan Perkins]

Thanks for your note (and the clarification).  We'll take a look at your
reproducer and get back to you soon.

On Mon, Mar 23, 2015 at 10:53 AM Dovis Alessandro <adovis at student.ethz.ch>
wrote:

> Errata corrige: Running the same code with the option "-env
> MV2_RNDV_PROTOCOL=R3", the issue *disappears*.
> ________________________________________
> From: Dovis  Alessandro
> Sent: Monday, March 23, 2015 3:47 PM
> To: mvapich-discuss at cse.ohio-state.edu
> Subject: Segfault and corruption with RPUT/RGET
>
> Hello everyone,
>
> we are using MVAPICH2 2.1rc2 on a cluster with Infiniband (cards: Mellanox
> ConnectX-3 Single Port [with VPI]; switches: Mellanox SX6018).
>
> You can find - at the following link - a simplified version of the part of
> our system that experiences the issue:
> https://github.com/dovix91/mvapich2-issue
>
> Running the binary with a command like the following, causes a
> segmentation fault after some iterations of the sending loop:
> /opt/mvapich2-2.1rc2/bin/mpiexec --host machine1,machine2 -n 2 ./bug_test
> 0 5 2
> Furthermore the results are corrupted at the receiving side: this can be
> seen by the message footer (that we use at the application level), set at
> lines 82-83 of bug_test.cpp and printed in net/mpi/
> NetworkManagerMPIBlockingMultithread.cpp; the receiver prints many times
> "MPI recv: batch number 0, sequence number 0", which is not a valid batch
> number (the sender prints only positive batch numbers, correctly).
>
> Running the same code with the option "-env MV2_RNDV_PROTOCOL=R3" the
> issue doesn't disappears.
>
> Thank you very much for the help.
>
> Best,
> Alessandro Dovis
> _______________________________________________
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>
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