Add 2MB Huge Page Support for Symmetric Heap + CXI Fence Optimization - #1232

Draft

bcmIntc wants to merge 43 commits into

Sandia-OpenSHMEM:mainfrom

bcmIntc:bcm_test-FI_MR_LOCAL

Commits on Apr 23, 2026

Temp until Mark pushes this to mainline.
bcmIntc
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1d02b81

Commits on May 4, 2026

barrier: three-phase hierarchical barrier via XPMEM + NIC dissemination
bcmIntc
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dbd6c8e

Commits on May 26, 2026

Add --enable-mr-local configure flag for FI_MR_LOCAL support

bcmIntc
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claude
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e10eec9
Merge branch 'bcm_cp_smartAtomics' into bcm_test-FI_MR_LOCAL
bcmIntc
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7f6553a
transport/ofi: zero max_buffered_send before fi_getinfo hint
bcmIntc
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f8682e6

Commits on May 27, 2026

Commits on May 28, 2026

transport/ofi: use FI_TRANSMIT_COMPLETE instead of FI_DELIVERY_COMPLETE for puts and non-fetch AMOs

bcmIntc
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claude
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0800f06
symmetric_heap: pre-fault heap at init to promote THP before fi_mr_reg

bcmIntc
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claude
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9fed329
transport/ofi: fix scalable+RVA MR registration to use segment MRs

bcmIntc
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claude
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5b7f569
symmetric_heap: revert pre-fault loop — too costly at scale

bcmIntc
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claude
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e881bd1
Revert "transport/ofi: fix scalable+RVA MR registration to use segment MRs"
bcmIntc
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dbf764e

Commits on May 29, 2026

symmetric_heap: add SHMEM_SYMMETRIC_HEAP_USE_DSMML runtime option

bcmIntc
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claude
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ff9da14
symmetric_heap: add MADV_COLLAPSE and DSMML runtime heap allocator

bcmIntc
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claude
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443d7a9
transport/ofi: add put pipeline depth limit to prevent TRS exhaustion

bcmIntc
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claude
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01ff1d2
transport/ofi: default OFI_PUT_PIPELINE_DEPTH to 0 (disabled)

bcmIntc
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claude
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0ae0744
transport/ofi: add SHMEM_OFI_AMO_PIPELINE_DEPTH for incast throttling

bcmIntc
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claude
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53eb16f
transport/ofi: use put counter watermark for per-call put_wait

bcmIntc
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claude
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fd6d2ec
transport/ofi: enable CXI hybrid local MR descriptor mode

bcmIntc
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claude
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31fd632
transport/ofi: print CXI hybrid MR desc status from PE 0

bcmIntc
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claude
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c7c63f2

Commits on Jun 1, 2026

Allocate Bounce Buffer from Symmetric Heap

markbrown314
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bcmIntc
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7654e4b
Improved OFI Transport Wait

markbrown314
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bcmIntc
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b79c049
Revert "Improved OFI Transport Wait"
bcmIntc
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129c227
Revert "Allocate Bounce Buffer from Symmetric Heap"
bcmIntc
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b199a90

Commits on Jun 2, 2026

Improved OFI Transport Wait

markbrown314
authored and
bcmIntc
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32fb6d6
Allocate Bounce Buffer from Symmetric Heap

markbrown314
authored and
bcmIntc
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6a369b2
Revert "Improved OFI Transport Wait"
bcmIntc
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ba00e35
Revert "Allocate Bounce Buffer from Symmetric Heap"
bcmIntc
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061a056

Commits on Jun 3, 2026

collectives: fix hier_sense divergence with per-team state

bcmIntc
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claude
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1641ea9
transport/ofi: skip put_quiet in fence for CXI provider

bcmIntc
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claude
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7880ab4

Commits on Jun 4, 2026

symmetric heap: use anonymous MAP_HUGETLB for huge page allocation

bcmIntc
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claude
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0e985e7
symmetric heap: explicitly request 2MB pages with MAP_HUGE_SHIFT

bcmIntc
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99b900a
symmetric heap: use NULL hint for MAP_HUGETLB allocation

bcmIntc
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922ae35
symmetric heap: add debug output for huge page allocation failures

bcmIntc
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6035f3e
symmetric heap: remove duplicate madvise after MAP_HUGETLB success

bcmIntc
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d92e508
symmetric heap: use requested_base hint for MAP_HUGETLB

bcmIntc
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claude
committed
e884c87

Commits on Jun 9, 2026

transport/ofi: refactor provider checks into shmem_transport_ofi_check_provider()

bcmIntc
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claude
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5bde435

Commits on Jun 11, 2026

transport/ofi: fix comment - should be FI_DELIVERY_COMPLETE not FI_TRANSMIT_COMPLETE
bcmIntc
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1b05b6b
Fix stack overflow, NULL dereference, and put completion handling

bcmIntc
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GitHub Copilot
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13b565e
Refine copy_self completion handling - use put_quiet for correctness

bcmIntc
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GitHub Copilot
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65191f4