Issues

• romio/pvfs2: classic strided read drops segments but reports the full count

  pmodels/mpich#8095 · Filter by author HaoZeke opened on Nov 3, 2026

• ch4/ofi: AM header overwritten when a pipelined send is issued deferred (SIGSEGV in RMA)

  pmodels/mpich#8074 · Filter by author j34ni opened on Oct 30, 2026
  1

• Steeper slow-down with GPU-aware MPI with strong scaling tests

  aurora
  pmodels/mpich#8066 · Filter by author jkwack opened on Oct 28, 2026
  1

• CH4 MPIX_Comm_revoke support

  pmodels/mpich#8062 · Filter by author Matthew-Whitlock opened on Oct 28, 2026
  1

• Difficulty using debuggers for process failure tests

  pmodels/mpich#8060 · Filter by author Matthew-Whitlock opened on Oct 28, 2026
  2

• MPICH 5.0.2 with internal PMI client doesn't use group barriers when server offers PMI-1.2

  pmodels/mpich#8056 · Filter by author garlick opened on Oct 27, 2026
  1

• romio/ad_lustre: collective write cost per piece grows with the number of contiguous pieces

  pmodels/mpich#8051 · Filter by author sihara opened on Oct 25, 2026

• MPI_Gatherv and MPI_Gatherv_init fail at 512 nodes x 96 ppn

  aurora
  pmodels/mpich#8036 · Filter by author colleeneb opened on Oct 17, 2026

• yaksa ZE backend : does not progress while a user kernel is resident on the GPU

  aurora
  pmodels/mpich#8033 · Filter by author jngkim opened on Oct 16, 2026
  1

• jenkins: bcast_comm_world_only 10 in ch4/ucx - asan

  pmodels/mpich#8031 · Filter by author hzhou opened on Oct 16, 2026

• ch3:tcp: coll/uoplong 11 occasionally hangs in osx Jenkins tests (ENOBUFS from writev treated as fatal)

  pmodels/mpich#8029 · Filter by author hzhou-muse opened on Oct 16, 2026
  2

• Fortran sentinels (MPI_IN_PLACE etc.) are in .bss in libmpifort.so, so shared libraries using mpif.h get private copies

  pmodels/mpich#8020 · Filter by author eschnett opened on Oct 14, 2026
  3

• MPICH behavior changed when MPI_Comm_rank called *before* MPI_Init() - Aurora

  aurora
  pmodels/mpich#8014 · Filter by author brianhol42 opened on Oct 13, 2026
  11

• ad_lustre: a single failed write deadlocks MPI_File_write_all on all ranks

  pmodels/mpich#7993 · Filter by author sihara opened on Oct 5, 2026
  1

• mpi.h does not define MPI_Fint by default — is this intended and what should packages do?

  pmodels/mpich#7973 · Filter by author ericch1 opened on Sep 16, 2026
  2

• ABI: Comments after running libabigail against the MPI ABI stubs

  pmodels/mpich#7938 · Filter by author dalcinl opened on Aug 20, 2026

• MPI_File_write_all / read_all collective buffering does not scale for 4D block-decomposed subarray views (Lustre): 6x slower than a user-level MPI_Alltoallv + POSIX transposition

  pmodels/mpich#7935 · Filter by author paboyle opened on Aug 13, 2026
  5

• Fortran 2008 strided subarrays are passed with the wrong layout

  pmodels/mpich#7932 · Filter by author eschnett opened on Aug 11, 2026

• MPICH Fortran test greqf uses extrastate wrong

  pmodels/mpich#7922 · Filter by author eschnett opened on Aug 4, 2026
  8

• A common abstraction layer for MPI

  pmodels/mpich#7920 · Filter by author LecrisUT opened on Aug 3, 2026
  5

• Feature request: Adding a CVAR to better support oversubscription

  pmodels/mpich#7894 · Filter by author dalcinl opened on Jul 22, 2026

• MPI_Session fail when running concurently with a MPI program

  aurora
  pmodels/mpich#7852 · Filter by author TApplencourt opened on Jun 24, 2026
  2

• MPI_Comm_connect/accept for singleton init processes broken in MPICH v5.0.1

  pmodels/mpich#7805 · Filter by author eellis-mw opened on May 12, 2026
  2

• Getting GPU IPC to work with HIP/ROCm

  pmodels/mpich#7779 · Filter by author mszpindler opened on Apr 21, 2026
  7

• RC tarballs and shared library versioning

  pmodels/mpich#7765 · Filter by author dalcinl opened on Apr 8, 2026
  2