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lattice / quda

QUDA is a library for performing calculations in lattice QCD on GPUs.
https://lattice.github.io/quda
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QIO interface is broken. #206

Closed alexstrel closed 9 years ago

alexstrel commented 9 years ago

Did anyone test qio interface in the current master? I got a segfault while tried to read a gauge config via qio. As a bypass I replaced qio stuff with that one from multigrid branch. It seems working for me so far (single GPU).

maddyscientist commented 9 years ago

It doesn't surprise me that QIO in multigrid is more stable than master, though I QIO support worked on master last time I checked. You are compiling with QMP support I presume?

alexstrel commented 9 years ago

yes I did. On 2 GPUs mutigrid qio stuff is also segfaulting.

alexstrel commented 9 years ago

Problem is that test programs (or, at least, invert_test and deflation_test) don't create QMP logical topology. Lines 68-72 in https://github.com/lattice/quda/blob/multigrid/tests/layout_hyper.c allowed me to bypass this issue for single GPU execution. After similar manipulations I managed to avoid the segfault on 2 GPUs as well. This is not good approach, more robust fix is needed.

maddyscientist commented 9 years ago

Alexei, all these issues should now be fixed, including for deflation_test.