CollectiveX MVP v0.1 by Oseltamivir · Pull Request #2004 · SemiAnalysisAI/InferenceX

Oseltamivir · 2026-07-03T17:38:00Z

Summary

CollectiveX v1 expert-parallel communication benchmark and its isolated GitHub Actions publication path.

Benchmark and publication contract

Covers eight SKUs, six backend families, EP8/EP16, normal and genuine low-latency semantics.
Locks 58 shards, 608 requested cases / 1,600 points, including 364 runnable and 244 explicit unsupported cases.
Standardizes every measured component at 32 synchronized full-roundtrip warmups and 64 x 8 timed iterations: 512 cross-rank-max observations.
Defaults every sweep to release_tag=unversioned; only an explicit v1 tag with the locked full-matrix digest emits a release marker.
Uses no results server, Vercel storage, GCP, Neon, managed database, or managed object store.

Validation

151 Python contract/unit tests pass.
Matrix SHA-256: f1ca85f9689922b90edd5767b9ff2a902f6b896f32f68b2ca086dde3fd2157d0.
Case catalog SHA-256: 8e262178f770b0cdde12b7ec71604afd87251fa55685d4594f29717153ad6bbd.
Regeneration confirms 58 shards, 364 runnable cases, 244 unsupported cases, and 1,600 points.
Actionlint, ShellCheck, and git diff --check pass.

中文说明

本 PR 完成 CollectiveX v1 专家并行通信基准测试及隔离式 GitHub Actions 发布链路。代码已准备执行三轮完整、无 canary 的 V1 运行；本 PR 目前不声称已有完成 promotion 的实测结果。

基准测试与发布约定

覆盖八种 SKU、六类后端、EP8/EP16，以及常规与真正低延迟语义。
固定为 58 个 shard、608 个请求 case / 1,600 个点位，其中包含 364 个可运行 case 和 244 个显式 unsupported case。
每个被测组件统一执行 32 次同步完整往返预热和 64 x 8 次计时迭代，共 512 个跨 rank 最大值观测。
所有扫描默认使用 release_tag=unversioned；只有显式选择 v1 且匹配固定完整矩阵摘要时才生成 release marker。
发布必须使用来自同一 source SHA 的三个成功且带 tag 的运行。手动 publisher 会重新校验运行 metadata 与精确 marker，在 runner 临时存储中完成 promotion，并仅保留清理后的 cxpublication-v1-* NDJSON。
不使用 results server、Vercel storage、GCP、Neon、managed database 或 managed object store。

验证

151 个 Python 约定/单元测试通过。
Matrix SHA-256：f1ca85f9689922b90edd5767b9ff2a902f6b896f32f68b2ca086dde3fd2157d0。
Case catalog SHA-256：8e262178f770b0cdde12b7ec71604afd87251fa55685d4594f29717153ad6bbd。
重生成确认 58 个 shard、364 个可运行 case、244 个 unsupported case 和 1,600 个点位。
Actionlint、ShellCheck 与 git diff --check 通过。

The per-SKU launchers rejected nccl-ep at setup (unsupported EP backend): add nccl-ep to the allowlists (single-slurm + gb-nv: deepep-v2|nccl-ep; mi-amds: mori|nccl-ep) and keep pinned-source staging deepep-v2-only (nccl-ep has no source build).

… provenance The commit uniquely determines its tree and submodule gitlinks, so rev-parse HEAD at source fetch already enforces them — the separate tree pin was redundant. The nccl-check upstream_commit was provenance-only (the patch is applied by stage.py rewrite-deepep-v2, which needs no hash). Remove both from configs/backends.json, the config.py registry emit, common.sh (required names + source-pin format repo|commit|fmt), prepare_backend.sh (cache key + DEEPEP_TREE export/persist), and the registry test. 30 tests + 6 subtests green.

Rip out the nccl-ep backend entirely (adapter, capability entry, run_ep choices/import + dead dist-init branch, launcher gates, common.sh + prepare_backend probes, ep_harness label map, workflow choice, tests). The matrix is back to deepep-v2 + mori. Plus dead-code/slop removal (reviewed, no remaining consumers): drop unused EPBackend oracle_layout/payload_unit + redundant WorkloadSpec fields (routing/seed/hidden/topk/experts/num_logical) + RankInputs.global_tokens; mori dead label/tuning vars; routing SOURCE_ID_CONTRACT + token_offset; probe verify_cache_mount; numpy from requirements; README/methodology trim. 30 tests + 6 subtests green; matrix generates deepep-v2 (9) + mori (4).

Move the timing profile, routing seed, and measured + conditioning token ladders out of ep_harness constants into configs/suites.yaml as the sole source; the matrix bakes them into every scheduled case and run_ep receives them only through required CLI args (no module defaults, no cross-check guards). Decode ladder extended to 512 tok/rank; prefill densified to 256..2048. Dedupe the oracle expert-transform coefficients and column pattern between transform and expectation; unify the oracle report shape.

…e operator-config merge Drop artifact fields nothing consumes: the top-level case object, outcome.validity, shape, realized_placement/device_count, oracle ordering_contract/order_stable, and the scheduled-case canonical/timing/samples/warmup_semantics duplicates (all still required fields survive; the frontend keys off identity.case_factors.case). Move the operator-config overlay merge from the workflow's inline python into config.py merge-operator-config (one tested codec); drop backends.json documentation-only schema_version/notes/platforms/patches and the stage ownership tag. Update methodology.md to the emitted shape.

…step The merge-operator-config step runs before the launcher cd's into $COLLX_SOURCE_ROOT, in a cwd where the relative experimental/CollectiveX path does not exist (the sweep source is staged under $COLLX_SOURCE_ROOT, not checked out into the workspace). The prior inline heredoc needed no file path; the extracted subcommand did. Reference config.py by its absolute staged path, matching the Extract step.

…ioning ladder The untimed warm-up now walks the measured token ladder ascending (8 rounds per shape, cold-jump-safe) and reuses those problems in Pass 1, instead of a distinct conditioning ladder. Removes conditioning_ladders from suites.yaml, the --conditioning-ladder argv (config.py both codecs), the WorkloadSpec conditioning fields, and retain_global (every shape retains its global trace). create_buffer sizes from the measured maximum (the old value folded in the ramp but never exceeded that max, so the JIT dir is stable). Docs + tests updated.

… h100 deepep-v2 EP8 Consolidate per-SKU platform identity, placement, operator-field requirements, canonical policy, and scale-out RDMA selectors into one tracked configs/platform_config.json. capability.py, runtime/config.py, the launchers, and prepare_backend.sh all derive from it; suites.yaml 'platforms: all' resolves to the registry. Removes the separate network-config.json (selectors move to the mi355x 'network' block) and the gitignored platforms.yaml indirection. Falsify the h100-dgxc deepep-v2 wall for EP8 (on-node ElasticBuffer + dispatch/ combine validated 2026-07-11): schedule EP8 (LSA), keep EP16 walled pending a GIN-over-RoCE 2-node test. MoRI kernel type is now derived by the adapter from (arch, scope) rather than an env var; block/warp tuples unchanged. Routing counter uses keyed BLAKE2b to match the documented oracle. Shared launcher prologue/tail + registry-driven topology validation.

Adding .shards to stage.py EXCLUDES (in 2424fb47) dropped the per-leg control JSON (COLLX_SHARD_FILE=.shards/<leg>.json) from the compute-visible staged tree. The cross-node preflight then failed 'test -r shard' -> exit 11 -> repository-stage failure on EVERY leg (all SKUs, both backends). Remove .shards from EXCLUDES; keep .venv/.pytest_cache (local cruft, absent on runners). Extend StageTests to assert .shards/<file> is staged.

…platform_config.json Operator decision (2026-07-12): move runner-local operator config (partition, account, qos, squash_dir, exclude_nodes) and scale-out RDMA selectors from the GHA secrets into the tracked platform_config.json 'operator'/'network' blocks, derived from live cluster state + a recovered manual config. An operator config document, when present, still overrides per field; path '-' (no document, known SKU) uses the registry baseline. collx_load_operator_config falls back to the registry-only sentinel when no operator file exists but the SKU is known. Complete baselines (run without secrets): h100, h200, b200, b300, mi355x. Still secret-fed: gb200 (no path), mi300x/mi325x (unreachable at derivation), gb300 (squash_dir/enroot_cache_path not recoverable). audit_salt stays secret.

The 'run without secrets' path requires this: deleting the base secret makes COLLECTIVEX_OPERATOR_CONFIG_CONTENT empty, and json.loads('') crashed merge before the registry-baseline fallback was reached, failing every leg at merge. Treat an empty/blank base as {"runners":{}} so the merged file is still written (launcher finds a config -> uses the tracked platform_config.json operator baseline). A present base is still parsed strictly; overlays already skip empty. Verified: complete-baseline SKUs emit full config; gb200/gb300 fail-closed with validation-missing markers.

…implification Add tracked operator baselines (discovered on-cluster via SSH) so these run without secrets: gb200 partition=batch, account=benchmark, storage_roots=[/mnt/lustre01/users-public/sa-shared] gb300 + squash_dir=/data/home/sa-shared/collectivex/containers, enroot_cache_path=/data/home/sa-shared/collectivex/enroot-cache mi300x partition=compute, squash_dir=/home/bshan/collectivex/containers mi325x stays secret-fed (no SSH access target; runners offline). Runtime simplification (staged-tree cross-node preflight, canonical_policy, and registry run_timeout/master_port removed; run_timeout/master_port now defaulted in launchers/common.sh; shard control read from source, so .shards is excluded from the staged copy). Docs/tests reconciled: README documents the operator baseline + per-field secret overlay; skips_secret_fed_sku test points at mi325x.

…300); revert mi300x baseline b300: the runtime refactor dropped the per-path 'git -c safe.directory' guard the old collx_git wrapper applied, so on b300's UID-mapped Actions shell (NFS realizes the staged source dir as UID 0) git aborts the DeepEP fetch with 'dubious ownership'. Restore a job-scoped 'git config --global --add safe.directory *' in collx_prepare_deepep_source (ephemeral per-job HOME; reaches the fmt submodule child git; runner UID is inside the trusted cluster boundary). mi300x: revert the operator baseline. The reconstructed squash_dir was wrong (compute nodes have root-owned /home; only the submit host had /home/bshan), and the cluster's node-boot blocker ('nodes still not ready') prevents probing a compute node for the correct path. mi300x stays secret-fed/blocked like mi325x.

…anual-run fallbacks Every case now arrives from the matrix with fully-specified argv, so make --mode/--phase/--routing/--case-id/--suite/--workload-name/--gpus-per-node/ --scale-up-domain required and remove the getattr/'or ep_size'/'manual' fallbacks in run_ep/ep_harness/ep_deepep_v2/ep_mori/ep_backend (drop --timestamp). Simplify collx_run_shard/collx_launcher_cleanup control flow (equivalent). Verified: 28-case emit->parse seam all valid with non-zero placement; 32 tests.

…atform_config backends field Each SKU now declares its runnable {backend: [ep_sizes]} in platform_config.json; sweep_matrix derives topology from placement and resolves runnable/unsupported from that map, replacing capability.py (deleted) and the separate backends.json (deleted; DeepEP source pins + image tags now inline constants in common.sh). Drop vendor/machine/operator_fields (unused after this); launchers self-declare the operator fields they require via collx_require_vars; ep_mori derives arch from platform_config directly. Verified: 28 tests; py_compile/bash -n; all collx_* + config.py subcommands resolve; matrix scheduling matches each SKU backends map (h100/b300/mi300x/mi325x EP8-only, rest full); 28-case emit->parse argv seam valid; operator emit + launcher require_vars guard cleanly. Docs (README/methodology) repointed off backends.json.

…/point Fully de-secrete the runner config: drop the 7 COLLECTIVEX_*_CONFIG_CONTENT secret env vars + COLLECTIVEX_OPERATOR_CONFIG_REQUIRED and the whole merge-operator-config machinery (workflow step, config.py merge_operator_config + OPERATOR_ENV, common.sh secret-content/ephemeral handling). collx_load_operator_config now falls straight to the tracked platform_config.json baseline ("-" sentinel) under canonical GHA instead of requiring a merged secret file; a baseline-less SKU emits nothing and fails cleanly at the launcher's require_vars. Verified end-to-end by simulating a real leg (h200 -> baseline emitted, no die; mi325x -> clean miss). suites.yaml timing trials_per_point 128->256 (2048 obs/component, tighter p99); README + methodology updated to match. NOTE: version left at 1 (operator's call). prepare_backend.sh: cosmetic reformatting only. Frontend (separate repo, already pushed) verified to ingest this artifact contract: tsc clean, 46 tests pass, all required fields present.

b300 nodes have the gdrdrv module + nvidia_peermem loaded and a complete RoCE network block (bond0 + RoCE rdma_devices + gid 3), so NVSHMEM-IBGDA can register GPU memory via peermem; the prior '/dev/gdrdrv absent' exclusion may be stale. Un-wall b300 EP16 (backends [8,16], drop its CELL_EXCLUSIONS entry) so the sweep validates it on the metal. h100/mi300x/mi325x EP16 stay walled (no network block / infra-blocked); mi355x EP16 remains a real ionic MR-cap hardware wall.

…ll, BF16-faithful combine oracle Config/runtime: - Move container image pins out of common.sh into per-SKU image/image_platform in platform_config.json, plumbed via config.py PLATFORM_FIELDS and required by every launcher; registry-only SKUs (mi325x) still receive image config. - collx_apply_network_profile pins NCCL_IB_MERGE_NICS=0 on every scale-out (dual- port fusion disables NCCL GIN -> deep_ep EP16 asserts railedGinType==NONE) and NCCL_CROSS_NIC=0 when rail_isolated=1. Un-walls h100 + b300 deepep-v2 EP16 (validated 16/16 on-metal). h100 gains RoCE selectors + network block; b300 gains rail_isolated. - Bump container-import lock wait 900s->2700s with an explicit timeout message (a concurrent leg holds it ~18min for the b300 squash). - CELL_EXCLUSIONS: only mi300x/mi325x mori EP16 remain (deleted network block + cluster/access), with detailed reasons and a walled-vs-red doc. Correctness oracle: - Derive the expected combine from the values actually communicated: cast each destination rank's FP32 aggregate to BF16 before summing, exactly as the adapter does, so the gate models real BF16 accumulation instead of hiding it in a wide allclose. Tighten to max elementwise relative error < 8*2^-8 (mag floor 0.02); drop the loose rtol=0.05/atol=0.02 allclose and the global max_rel. - benchmark_stage drains dispatch with an untimed combine when dispatch_needs_combine_cleanup (MoRI), matching benchmark_dispatch. - Multi-point run summary (ladder ends + interior) instead of one mid-ladder row. - methodology.md + tests updated (27 pass).

…EP16 passes the tight gate The tightened combine oracle (24335481) cast each destination rank's aggregate to BF16 and summed in FP32, but omitted the per-scale-up-domain BF16 cast the backend applies to each node's partial before the scale-out send. Single-domain groups (every EP8 case + MNNVL EP16, where ep_size <= scale_up_domain) were unaffected, but multi-node RoCE EP16 (ep_size 16 > scale_up_domain 8, two domains) landed a deterministic 0.0478 off the expectation -- above the 8*2^-8=0.03125 gate -- reddening h100/h200/b200/b300 EP16 that are otherwise correct (run 29203408512: all four failed 'semantic correctness', identical max_rel, while gb200/gb300 EP16 over MNNVL passed at ~0.005). _expected_transformed_combine now reproduces the two-level reduction: per-rank BF16 output, FP32 accumulation within a scale-up domain, a BF16 cast of each domain aggregate for the scale-out send, then FP32 summation of the domain partials. Thread scale_up_domain through _run_expert_oracle. A numpy BF16 simulation confirms the multi-domain residual drops ~7x below the gate while single-domain cases become near-exact; the bound is unchanged. Docs updated.

… wall model, MoRI IntraNode-only on CDNA Config: replace configs/suites.yaml (YAML) with a flattened configs/sweep.json (single suite/workload), dropping the PyYAML dependency (requirements.txt gone) and the workflow's install step and 'suites' input. All readers are stdlib json. Prefill ladder moves to [1024,2048,4096,8192] (docs updated to match); version stays 1. Matrix: rewrite sweep_matrix.py (~400->223 lines). Walls are now purely the per-SKU 'backends' map -- a cell not in the map is 'unsupported' (never scheduled), a cell in the map schedules and is allowed to red. Removes the CELL_EXCLUSIONS table; test_matrix.py now asserts unsupported == exactly the (sku,backend,ep) absent from backends. config.py derives COLLX_* env names by convention (behavior-preserving) and splits OPERATOR_FIELDS/NETWORK_FIELDS. MoRI: drop the AsyncLL path; every CDNA scale-up cell uses the direct IntraNode kernel, scale-out EP16 uses InterNodeV1 (no low-latency-family kernel on either vendor). Size the communicator buffer to max(512, max_tokens_per_rank) instead of asserting <=512, so the larger prefill ladder runs. prepare_backend.sh: restructure into discovery/lifecycle/container-boundary helpers; same persisted rank-env contract (RANK_ENV_VARS), querying package roots via the venv interpreter, and persisting the deepep-v2 EP_SUPPRESS_NCCL_CHECK unset into the node env. 27 tests pass.

…tic heap The mi355x EP16 failure was misclassified as a physical ~1 GiB single-MR Pollara/Ionic wall. Falsified: the NICs advertise multi-GiB max_mr_size, direct uncached GPU-mem registration succeeds through 6-8 GiB, and Ionic multiplexes several firmware-command failures onto EINVAL (so the log proves only that the 6 GiB *static* registration failed during InterNodeV1 init, not an MR-size violation). MoRI already ships the supported path: VMM_HEAP backs the heap with on-demand 64 MiB DMA-BUF chunks (PR #155, validated on MI355X + AI NIC). Set MORI_SHMEM_MODE=VMM_HEAP in create_buffer, before shmem_torch_process_group_init, gated on self._inter_node — scale-out EP16 only, so scale-up EP8 (intranode, no RDMA registration) keeps the default static heap and its measurement basis is unchanged. The prefill ladder never enlarged the MR (MORI_SHMEM_HEAP_SIZE stays 6G, a virtual reservation under VMM). 27 tests pass.

…r this PR)

…the registry Addresses functionstackx's PR review: capture the NIC and switch per SKU so same-GPU clusters on different fabrics stay distinct registry entries (e.g. a second b200 cluster on a different NIC becomes its own entry with its own fabric + network block; the matrix already keys shards by SKU). Each platform now has a fabric {nic, switch} block, sourced from the gpu-specs page and cross-checked against the existing network selectors (h200 = Quantum-2 InfiniBand -> no RoCE gid; b200/b300 = Ethernet -> gid 3; mi355x = Pollara). test_runtime asserts every entry carries a non-empty nic and switch.

All 17 conflicts were add/add (or workflow-side) against main's CollectiveX MVP v0.1 squash (#2004), whose tree is identical to origin/collectivex — a full ancestor of this branch — so the branch side supersedes everywhere. Main-side action-version bumps (ad12cd8) were already present here.

Oseltamivir requested a review from a team July 3, 2026 17:38

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Oseltamivir force-pushed the collectivex branch 4 times, most recently from 758fa52 to 1c5b901 Compare July 4, 2026 01:11

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Oseltamivir force-pushed the collectivex branch 3 times, most recently from 7e5f80a to 28cbac4 Compare July 4, 2026 03:21

functionstackx changed the title ~~CollectiveX v1: cross-vendor EP benchmark suite~~ CollectiveX v1: cross-vendor EP benchmark suite / CollectiveX v1：跨厂商 EP 基准测试套件 Jul 4, 2026

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Oseltamivir added 23 commits July 14, 2026 15:04

ci(collectivex): sweep backend choices — add nccl-ep, drop deepep-hybrid

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chore(collectivex): drop AGENTS.md language override (out of scope fo…

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…r this PR)

Oseltamivir force-pushed the collectivex branch from 5a92dbd to 03fc762 Compare July 14, 2026 07:05

Oseltamivir merged commit a9e8ce1 into main Jul 14, 2026
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CollectiveX MVP v0.1 - #2004

CollectiveX MVP v0.1#2004
Oseltamivir merged 262 commits into
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Oseltamivir commented Jul 3, 2026 •

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Summary

Benchmark and publication contract

Validation

中文说明

基准测试与发布约定

验证

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Oseltamivir commented Jul 3, 2026 •

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