ep: CXI/Slingshot (libfabric) transport backend behind USE_CXI - #1

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fergusfinn wants to merge 20 commits into

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Commits on Jun 5, 2026

ep: add CXI/Slingshot (libfabric) transport backend behind USE_CXI
Fergus Finn
committed
bcf1c9e

Commits on Jun 10, 2026

Fix init_dist to correctly set CUDA device and default device in multi-GPU / srun environments
fergusfinn
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7eb9fd2
Fix proxy initialization by passing data_ptr instead of raw torch tensor and make initialize_uccl robust
fergusfinn
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3c3e5b9
Let Buffer manage scratch allocation and initialize uccl internally in test_internode_simple
fergusfinn
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c148a45
Revert changes to test_internode_simple.py
fergusfinn
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0ef8108
Fix CXI low-latency internode path
fergusfinn
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35ba3b6
Fix EP8 combine config for 4-GPU nodes
fergusfinn
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6be7e09
Fix host atomic buffer initialization
fergusfinn
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16de290
Fix zero-token RDMA rank count clearing
fergusfinn
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7dec293
Add zero-layout guard regression test
fergusfinn
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c386222

Commits on Jun 11, 2026

ep/cxi: async write path with per-completion ring retirement

fergus barratt
authored and
fergusfinn
committed
e0c2a92
ep/cxi: gate control atomics on completion of their preceding writes

fergus barratt
authored and
fergusfinn
committed
275e8cf
ep/bench: sustained dispatch loop for wire-utilization measurement

fergus barratt
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fergusfinn
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b9e6a6c
ep/bench: fix dispatch_loop teardown ordering (context-destroyed abort)

fergus barratt
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fergusfinn
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9b8dc12
ep/bench: drop cached-dispatch output ref before teardown in dispatch_loop

fergus barratt
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fergusfinn
committed
e808810
ep/bench: scope measurement tensors so dispatch_loop tears down cleanly

fergus barratt
authored and
fergusfinn
committed
98304f6
ep: account for the CXI barrier carve-out in the atomic-buffer sizing assert

fergus barratt
authored and
fergusfinn
committed
8b45c6d
gitignore core dumps (containers run with the repo as workdir)

fergus barratt
authored and
fergusfinn
committed
19f36fc
Merge pull request #4 from doublewordai/cxi-async-transport
fergusfinn
authored
dd2a672
ep: fix two review findings (barrier seq wrap under CXI, uninit member)
fergus barratt
committed
373ce5d