Issues

• Capabilities of classic Converse not in reconverse: open decisions and plans

  charmplusplus/reconverse#296 · Filter by author lvkale opened on Oct 20, 2026
  1

• Heterogeneous PEs per process: per-process node-size table behind CmiNodeOf/CmiNodeFirst/CmiNodeSize, homogeneous fast path as a build option

  charmplusplus/reconverse#286 · Filter by author lvkale opened on Oct 17, 2026

• +old-scheduler: an endless stream of node-queue messages starves the PE's own work

  charmplusplus/reconverse#273 · Filter by author ritvikrao opened on Oct 12, 2026

• Per-PE thread queue: emptiness check walks all producers; a local message costs ~1 us at 64 PEs per process (1x64 vs 8x7)

  charmplusplus/reconverse#271 · Filter by author lvkale opened on Oct 11, 2026
  1

• +ipc: run and measure the xpmem pool (untested, but auto selects it)

  charmplusplus/reconverse#263 · Filter by author lvkale opened on Oct 1, 2026

• Factor the +ipc shared-memory pool into a runtime-independent module (posix-shm/xpmem segments + offset lists), with reconverse as a thin wrapper; no per-message cost allowed

  charmplusplus/reconverse#262 · Filter by author lvkale opened on Sep 30, 2026

• Spanning-tree broadcast fan-out to peers runs in rank 0's handler; a rank 0 blocked in CmiNodeBarrier deadlocks peers waiting for the broadcast

  charmplusplus/reconverse#261 · Filter by author lvkale opened on Sep 30, 2026
  1

• IPC pool: bump allocator never reclaims space across bins, so a pool can stay exhausted and every send silently falls back

  charmplusplus/reconverse#260 · Filter by author lvkale opened on Sep 29, 2026

• LCI receive packet pool exhaustion hangs the run with a 'Deadlock alert! no posted recvs' flood (Delta 8 nodes, Frontier 32 nodes)

  charmplusplus/reconverse#257 · Filter by author lvkale opened on Sep 27, 2026
  6

• Broadcast fan-out: one message per process and nokeep sharing within a process; SPANTREE is off by default

  charmplusplus/reconverse#239 · Filter by author lvkale opened on Sep 16, 2026
  1

• Consolidate startup collectives: a backend all-gather for topology, affinity report and IPC pid exchange

  charmplusplus/reconverse#236 · Filter by author lvkale opened on Sep 16, 2026

• Make reconverse independently consumable: install rules, exported CMake package, pkg-config

  charmplusplus/reconverse#233 · Filter by author lvkale opened on Sep 14, 2026

• ConverseInit should own CPU affinity, topology and IPC initialization (today Charm++ and each standalone program must call them)

  charmplusplus/reconverse#229 · Filter by author lvkale opened on Sep 13, 2026
  2

• Zero-copy API unusable with multiple LCI devices: CMK_NOCOPY_DIRECT_BYTES is compile-time but getRMR scales with +lci_ndevices

  charmplusplus/reconverse#203 · Filter by author lvkale opened on Aug 14, 2026

• LCI IBV completion assert (wcs[i].status == IBV_WC_SUCCESS) under load at 960 PEs; surviving ranks hang instead of aborting

  charmplusplus/reconverse#193 · Filter by author lvkale opened on Jul 28, 2026

• CmiPushPE contention bug

  charmplusplus/reconverse#171 · Filter by author ritvikrao opened on May 12, 2026