## Motivation
Several RDMA/Thunderbolt UX issues in the dashboard and macOS app:
1. **Debug mode showed "? ?" for RDMA connections** — the topology view
only extracted IPs from socket connections, not RDMA interface names
2. **No way to detect if RDMA is actually enabled** — the system only
knew about TB5 hardware and RDMA topology edges, not whether `rdma_ctl`
was enabled on each node
3. **False "RDMA AVAILABLE" info box** — showed on Mac Minis with idle
TB5 ports even when RDMA was already enabled, and on single nodes with
TB5
4. **macOS app only showed local RDMA status** — ran `rdma_ctl` locally
with no visibility into other nodes in the cluster
## Changes
### Dashboard: Fix RDMA debug labels (`0abc90c4`)
- Added `sourceRdmaIface` and `sinkRdmaIface` to `TopologyEdge`
interface
- Updated `TopologyGraph.svelte` and `ModelCard.svelte` to show `RDMA
en2 → en3` instead of `? ?`
### Dashboard: TB5 RDMA info box (`a3795552`, `8ce8e173`)
- Added dismissible info box when 2+ nodes have TB5 hardware but RDMA is
disabled
- Includes setup instructions (Recovery mode → `rdma_ctl enable` →
reboot, TB5 cables, macOS version match)
- Requires 2+ exo nodes with TB5 to avoid false positives from
single-node setups
### Backend: `rdma_ctl status` detection (`ae07239b`)
- Added `RdmaCtlStatus` event to `info_gatherer.py` — runs `rdma_ctl
status` with 5s timeout, `shutil.which` guard, and `OSError` handling
(polls every 10s on macOS)
- Added `NodeRdmaCtlStatus` model to `profiling.py` and `node_rdma_ctl`
field to `State`
- Handle in `apply.py` (event apply + node timeout cleanup)
- Exposed `nodeRdmaCtl` in dashboard store (`app.svelte.ts`)
- Info box detection now uses actual RDMA status instead of TB5 link
speeds
### Dashboard: Per-node RDMA debug labels (`ae07239b`)
- Debug mode shows `RDMA:ON` (green) or `RDMA:OFF` (dim) per node in
topology view, below the TB bridge label
### macOS app: Cluster-wide RDMA status from `/state` (`a1455b61`,
`d0d77b63`)
- Added `NodeRdmaCtlStatus` to `ClusterState.swift` — decoded from
`/state` endpoint
- Replaced local-only `rdma_ctl status` check with cluster-wide
`nodeRdmaCtl` from state
- Debug section shows per-node RDMA enabled/disabled for all nodes in
the cluster
- Still shows local `ibv_devices` and `ibv_devinfo` details (device
names, active ports) for richer local debugging
## Files changed
| Area | File | Change |
|------|------|--------|
| Backend | `src/exo/utils/info_gatherer/info_gatherer.py` |
`RdmaCtlStatus` event, monitor task |
| Backend | `src/exo/shared/types/profiling.py` | `NodeRdmaCtlStatus`
model |
| Backend | `src/exo/shared/types/state.py` | `node_rdma_ctl` field |
| Backend | `src/exo/shared/apply.py` | Event handler + timeout cleanup
|
| Dashboard | `dashboard/src/lib/stores/app.svelte.ts` | `nodeRdmaCtl` +
`nodeThunderbolt` in store |
| Dashboard | `dashboard/src/routes/+page.svelte` | Info box with RDMA
detection + instructions |
| Dashboard | `dashboard/src/lib/components/TopologyGraph.svelte` | RDMA
debug labels per node + fix "? ?" |
| Dashboard | `dashboard/src/lib/components/ModelCard.svelte` | RDMA
interface display fix |
| App | `app/EXO/EXO/Models/ClusterState.swift` | `NodeRdmaCtlStatus`
struct + decode |
| App | `app/EXO/EXO/ContentView.swift` | Cluster-wide RDMA view + local
device details |
| App | `app/EXO/EXO/Services/NetworkStatusService.swift` | Remove local
`rdma_ctl`, keep `ibv_*` |
## Test Plan
- [x] `uv run basedpyright` — 0 errors
- [x] `uv run ruff check` — pass
- [x] `nix fmt` — clean
- [x] `cd dashboard && npm run build` — success
- [x] `uv run pytest` — 188 passed
- [x] Xcode build — compiles (only pre-existing `dist/exo` resource
error)
- [x] Deployed to Mac Minis — `nodeRdmaCtl` shows `enabled: true`, no
false info box
- [x] Deployed to James cluster — RDMA debug labels show correctly
🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: Claude Opus 4.6 <[email protected]>
