Hi Victor, I looked your test code and I think it is due to a bug in our MPICH RMA that the request handler is not re-entrant safe, which makes win_ptr->at_completion_counter being decremented twice for one GET operation. We will fix it as soon as possible. I created a ticket for this: https://trac.mpich.org/projects/mpich/ticket/2204, you can track the progress of this bug on it. Thanks, Xin ________________________________________ From: Victor Vysotskiy [[email protected]] Sent: Tuesday, November 18, 2014 6:00 AM To: [email protected] Subject: Re: [mpich-discuss] Assertion failed in file src/mpid/ch3/src/ch3u_handle_send_req.c at line 61 (RMA && Derived datatypes) Hi Pavan,

FYI, this is what we heard back from the Mellanox folks: I think, issue could be because of older MXM (part of MOFED) being used. We can ask him to try latest MXM from HPCX (http://bgate.mellanox.com/products/hpcx)

Indeed, I just checked the latest software stack, including: - hpcx-v1.2.0-258-icc-OFED-3.12-redhat6.5; - MPICH v3.2a2 ('--with-device=ch3:nemesis:mxm'); And, there is no problem with 'assertion failed in ch3u_handle_send_req.c' anymore! Many thanks for your help and support! With best regards, Victor. _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss