Hui Zhou comments

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                                            Hui Zhou

ch4: default MPIR_CVAR_CH4_ROOTS_ONLY_PMI on

test:mpich/ch4/all

ch4: default MPIR_CVAR_CH4_ROOTS_ONLY_PMI on

test:mpich/ch4/ofi

ch4: default MPIR_CVAR_CH4_ROOTS_ONLY_PMI on

Thanks for the review @raffenet . The tests are not clean, but all of them are testing congestion issue that are not related to this PR. I'll merge now. If...

packaging: filter Python bytecode and tarball contents reproducibility

Great insights and great suggestions! Thank you! We definitely should filter unnecessary artifacts from release packages. Is it necessary to set `PYTHONDONTWRITEBYTECODE=1`? It's harmless for users who run autogen and...

[MPICH 4.3.0][NVHPC 24.9] Intermittent segfault in test/mpi/f08/datatype/structf

The assertion error from `hydra` is unrelated. Could you use `addr2line` to locate the source code line positions?

[MPICH 4.3.0][NVHPC 24.9] Intermittent segfault in test/mpi/f08/datatype/structf

That is a `memcpy`. I suspect it is a compiler bug that is try to optimize with vector instructions. And the intermittent-ness is due to randomly triggered alignment issue. Does...

test: reduce the stress in the manyrma2 test

test:mpich/ch4/ofi

mpl: extended instruction optimizations disabled if not supported by build environment

* If `--enable-fast=avx512f`, then it will be enabled, no runtime check will be performed. This will add -mavx-512f (to be discussed). * By default, MPICH will probe compiler and do...

hydra: spawn failing due to empty-string argument

Thanks @drew-parsons for reporting the issue. I believe this is not related to 32-bit architecture. It is due to an older version of mpi4py passing an empty argument in the...

Cannot build embedded UCX/libfabric on Fedora 42.

You would help us if you directly file issues with upstream: https://github.com/openucx/ucx and https://github.com/ofiwg/libfabric. If they already fixed it, point us to the patch, and we'll update the submodules.