Step-by-step checklist for bumping the pinned ONNX dependency / opset in ONNX Runtime (e.g. ONNX 1.21 / opset 26 → 1.22 / opset 27). Use when integrating a new ONNX release or release-candidate, updating the cmake/deps.txt onnx pin or the cmake/external/onnx submodule, regenerating cmake/patches/onnx/onnx.patch, raising kMaxSupportedOpset, or adding a new opset's CPU kernels. Covers the file taxonomy, archive-hash procedures, patch rebase/mirror rules, the RC→formal strategy, and the optimizer/EP gotchas that the automated audit script misses.
Step-by-step checklist for bumping the pinned ONNX dependency / opset in ONNX Runtime (e.g. ONNX 1.21 / opset 26 → 1.22 / opset 27). Use when integrating a new ONNX release or release-candidate, updating the cmake/deps.txt onnx pin or the cmake/external/onnx submodule, regenerating cmake/patches/onnx/onnx.patch, raising kMaxSupportedOpset, or adding a new opset's CPU kernels. Covers the file taxonomy, archive-hash procedures, patch rebase/mirror rules, the RC→formal strategy, and the optimizer/EP gotchas that the automated audit script misses.
ONNX Opset / Version Bump Checklist for ONNX Runtime
Repeatable process for upgrading the ONNX dependency in ONNX Runtime. Recurs on every ONNX
release. Canonical reference PRs: #27601 (ONNX 1.21, incremental rc1→formal — best
example), #26579 (1.20.1), #25678 (1.19). See also docs/How_To_Update_ONNX_Dev_Notes.md.
0. Strategy: RC → formal (incremental)
ONNX partner-validates each release candidate against ORT before publishing the formal
release — that is the whole point of the integration issue. When the issue points at a
rel-X.Y.0 branch:
Integrate the RC first. Pin by the release-branch HEAD commit (the vX.Y.0rcN
git tag usually does not exist yet). Run the full build + tests; file ONNX bugs upstream
(tag the ONNX release manager) for any ONNX-side defects found.
Re-pin per RC (rc2, rc3, …). Usually only the Group-A version-plumbing files change.
Drop any onnx.patch hunks that ONNX has merged upstream in the new RC.
Re-pin to the formal tagvX.Y.0 once the GitHub Release is published. Note the
release can sit as a draft (no git tag, git/ref/tags/vX.Y.0 → 404) for a while.
gh api repos/onnx/onnx/git/ref/heads/rel-X.Y.0 --jq '.object.sha'# RC branch HEAD
curl -sL https://raw.githubusercontent.com/onnx/onnx/rel-X.Y.0/VERSION_NUMBER # e.g. X.Y.0rcN
gh api 'repos/onnx/onnx/releases?per_page=5' --jq '.[].tag_name'# '' => draft
1. File taxonomy — what to change
Grouped so parallel work is safe. Group A must land first (the tree must build before
B/C/D can be validated). Throughout this section, bold letters in parentheses (e.g. gotcha
a, g) refer to the lettered gotchas a–i defined in §4.
Group A — version plumbing (always required, mechanical)
onnxruntime/test/python/requirements.txt; tools/ci_build/github/linux/python/requirements.txt; tools/ci_build/github/windows/python/requirements.txt; tools/ci_build/github/linux/docker/scripts/{requirements.txt,manylinux/requirements.txt,lort/requirements.txt}; tools/ci_build/github/linux/docker/inference/aarch64/python/cpu/scripts/requirements.txt. Confirm with git grep -n "onnx==<OLD>" (e.g. onnx==1.21) — grep the old pin you are replacing, not bare onnx==1. ⚠️ Do NOT bump all matches.git grep -n "onnx==1" also lists 3 transformers-model files — onnxruntime/python/tools/transformers/models/{llama,phi2,stable_diffusion}/requirements.txt — that are intentionally frozen at onnx==1.18.0. Leave those alone; only the 7 CI files above get the new pin.
apply ONNX-header-driven OpSchemaRegisterOnce macro fixes only if the build emits those errors
🆕 Tradition: bump EVERY EP that registers the op, in the SAME PR. When an op's kernel set
changes for the new opset (e.g. Range gaining fp16/bf16 at opset 27), version-split / bump
that op's registration in every EP that registers it — CPU and CUDA at minimum — so no
EP silently lags behind CPU and the advertised opset boundaries stay consistent. Even an
open-ended kernel that already binds the new opset (e.g. CUDA Range at SinceVersion(11),
which already matches opset-27 nodes) should still be version-split for convention/clarity
and to keep the kernel's advertised boundary matching the schema. Worked example — PR #28754
split Range into [11,26] + 27 in both CPU and CUDA (verified), keeping the same
numeric type set and deferring fp16/bf16 to ONNX function-expansion.
EP checklist when an op's kernel set changes for the new opset:
For each EP, grep -rn "<Op>)" onnxruntime/core/providers/<ep>/ (and its *_execution_provider.cc) to find every registration of the changed op.
EPs that register ONNX kernels via the ONNX_OPERATOR_[VERSIONED_]KERNEL[_CLASS_NAME] macros — cpu, cuda, js, and rocm if it registers the op (rocm is often hipified from cuda): version-split each into [prev_start, N-1] + a new N registration (class forward-declare andBuildKernelCreateInfo entry).
EPs with their own registration systems assess per their conventions, not the macro split — dml (REG_INFO(ver, Op, …) in OperatorRegistration.cpp), webgpu, coreml/nnapi/qnn/openvino/migraphx. A partition/capability check (e.g. MIGraphX's optype == "Range") is not a kernel registration and needs no split.
Bump the EP GetMaxSupportedOpSet ceilings (coreml/nnapi/vsinpu/webnn) in lockstep — see §4 gotcha b.
IR version is NOT bumped manually. ORT reads ONNX_NAMESPACE::Version::IR_VERSION from
the ONNX headers (onnxruntime/core/graph/model.cc); it follows the submodule automatically.
Group C — docs & test data (mostly auto-generated)
File
Change
docs/OperatorKernels.md
regenerate (see gotcha e — needs a built ORT module): python tools/python/gen_opkernel_doc.py --output_path docs/OperatorKernels.md
js/web/docs/webgl-operators.md
cd js/web && npm install && npm run build:doc (the WebAssembly CI "Check out of dated documents" stage fails otherwise)
broken_tests entries for genuinely-unsupported cases
Group D — conditional (touch only if build/tests flag it — but see §4 gotchas)
onnxruntime/core/framework/kernel_type_str_resolver_utils.cc,
onnxruntime/core/optimizer/layout_transformation/layout_transformation_potentially_added_ops.h,
onnxruntime/core/optimizer/qdq_transformer/qdq_util.cc, EP base_op_builder.h max-opset
guards (gotcha b), optimizer fusion path-matchers (gotcha a, c), and any CPU op
file hard-coding a SinceVersion ceiling for a changed op.
2. Archive-hash procedures
cmake/deps.txt 3rd field = SHA1 of the downloaded .zip (verified: sha1sum of
v1.21.0.zip equals the pinned 321d4acc...):
Shortcut: pin a wrong hash and build — ORT/FetchContent prints the expected one.
The submodule field (a git commit SHA) and the deps.txt field (a SHA1 of the archive
contents) are different by design — never interchange them.
vcpkg artifact must be mirrored to the Microsoft vcpkg store before --use_vcpkg
builds can download it (Terrapin upload — see below). Not self-service; coordinate with
infra. This is gotcha f.
Mirroring the ONNX archive to the MS vcpkg store (required before --use_vcpkg builds pass)
The SHA512 in portfile.cmake references a .tar.gz that vcpkg downloads from the Microsoft
vcpkg artifact mirror, not from GitHub. Until that exact archive is uploaded to the mirror,
--use_vcpkg builds fail with a download/hash error. The upload is done with the Terrapin
Retrieval Tool and is a Windows + az auth + internal-credential step — it cannot run
from a generic Linux CI host.
(a)-s <sha512>MUST equal the portfile.cmake SHA512 (the sha512sum of the same
.tar.gz — see §2). A mismatch re-uploads the wrong blob and the hash check still fails.
(b) This is why--use_vcpkg builds fail with a download error until the upload lands —
the mirror has no copy of the new archive yet.
(c) Microsoft-internal infra step: coordinate with the infra owner (e.g. @snnn).
External / Linux CI cannot perform it (needs Windows, the Terrapin tool, and az creds).
(d) The cmake/deps.txt path does NOT need this — that build fetches the .zip
straight from GitHub. Only the vcpkg (--use_vcpkg) path depends on the mirror.
(e) The .part suffix on the 2a -d path is vcpkg's in-progress-download temp name
(vcpkg renames it to the final .tar.gz once the hash verifies). Match whatever the failing
--use_vcpkg build actually requests in its downloads/ dir — the RC run wrote a .part;
the formal-tag run wrote the bare .tar.gz. When unsure, copy the exact path from the build's
download error.
(f) Why there is no GitHub fallback — x-block-origin (the actual failure mode).tools/ci_build/build.py (add_default_vcpkg_options, the --use_vcpkg_ms_internal_asset_cache
branch) configures the asset cache as
--x-asset-sources=x-azurl,https://vcpkg.storage.devpackages.microsoft.io/artifacts/;x-block-origin
(or the Terrapin x-script form). The trailing x-block-origin forbids vcpkg from falling
back to the GitHub origin — so if the blob is absent the leg does not silently download
from GitHub, it hard-fails. The asset-cache key is the bare lowercase SHA512 hex, no
extension: the blob lives at …/artifacts/<sha512>. Quick probe (no auth needed, read is public):
curl -s -o /dev/null -w "%{http_code}\n" \
https://vcpkg.storage.devpackages.microsoft.io/artifacts/<portfile-sha512>
# 200 = already mirrored (legs will pass) ; 404 = NOT mirrored (every vcpkg leg will 404-fail)
(g) This recurs on EVERY archive bump, including each RC. rc1→rc2→…→formal each produce a
new.tar.gz with a new SHA512, so each one is a distinct, un-mirrored blob. A green rc1 run
does not mean rc2 is mirrored. After every portfile.cmake REF/SHA512 change, run the curl
probe above; if 404, the upload (steps 1–2) must happen again before any --use_vcpkg leg can pass.
Terrapin-enabled self-hosted Windows legs (-a true) self-seed the mirror as a side effect; the
read-only x-azurl legs (Linux/macOS/GitHub-hosted) cannot and will 404 until that seed lands.
(h) CI failure signature (how to recognize this in a red build). Only the vcpkg-based
legs fail; the cmake/deps.txt FetchContent legs stay green (they pull the .zip from GitHub,
mirror-independent — see (d)). The failing leg's log shows a vcpkg download error during the
onnx port install, e.g.:
error: Failed to download from mirror set
error: https://vcpkg.storage.devpackages.microsoft.io/artifacts/<sha512>: failed: status code 404
error: x-block-origin set, prohibiting access to the original source URL
That 404 + x-block-origin set pair on a …/artifacts/<sha512> URL is this gotcha — the
<sha512> in the error equals the portfile.cmake SHA512. (Confirmed live for ONNX 1.22.0rc2:
rc1 blob → HTTP 200, rc2 blob → HTTP 404.)
(i) Fix options (in order of preference).
Self-seed via a Terrapin Windows leg — trigger/re-run one internal Azure DevOps pipeline
whose Windows job runs on a self-hosted pool (has C:\local\Terrapin\TerrapinRetrievalTool.exe)
and passes --use_vcpkg_ms_internal_asset_cache. Its -a true Terrapin fetches the archive
from origin and writes it back to the mirror; afterwards re-run the failing read-only legs.
(No infra ticket needed.) Manual Terrapin upload commands are in §2 steps 1–2 above.
az storage blob upload — anyone with write access to the devpackages storage account:
download the exact origin .tar.gz, verify sha512sum equals the portfile SHA512, then
az storage blob upload --container-name artifacts --name <sha512> --file <tar.gz> --auth-mode login.
The blob name must be the bare lowercase SHA512, no extension.
EngSys / 1ES ticket — if neither self-service path is available, ask the team that owns
vcpkg.storage.devpackages.microsoft.io to mirror the asset, giving them the origin URL + SHA512.
Verify any fix with the §2(f) curl probe returning HTTP 200 before re-running CI.
Detailed worked example (ONNX 1.22.0rc2 coordinates, live-probe evidence, full procedures):
see the architect runbook artifact architect-f1afcb8a/onnx-rc2-vcpkg-mirror-runbook.md.
3. onnx.patch rebase + binskim.patch mirror
For each hunk in cmake/patches/onnx/onnx.patch, against the new ONNX source:
Applies cleanly → keep.
Context shifted → rebase (regenerate line numbers/indices).
Fixed upstream in the new ONNX → drop the hunk (#27601 added a Slice dim_value==0
hunk for rc1/rc2 then removed it at rc3 once ONNX merged it).
ONNX restructured the region → rewrite the hunk. Example (1.21 → 1.22): ONNX replaced
the file(GLOB_RECURSE __tmp_srcs ...) source-gathering block with an
add_library(onnx_core OBJECT) + add_subdirectory(onnx) model, so the ONNX_MINIMAL_BUILD
hunk had to switch from editing set(ONNX_SRCS ...) to
target_sources(onnx_core PRIVATE "${ONNX_ROOT}/onnx/defs/data_type_utils.cc"). Note
data_type_utils.cc lives in onnx/defs/ (not onnx/common/), and headers do not
belong in target_sources (they are not compile units).
Structural note (re-validate every bump): in the onnx_core OBJECT-lib layout,
minimal mode skips add_subdirectory(onnx). That is only safe because
add_onnx_compile_options(onnx_core) (include dirs + protobuf link) and
add_onnx_global_defines(onnx_core) are unconditional at the top-level CMakeLists.
If a future ONNX moves those into the onnx/ subdirectory, minimal builds will fail to
configure/link — so never assume the minimal hunk still works; re-run the minimal build
(§5) on every bump.
Then mirror the final onnx.patch byte-for-byte into
cmake/vcpkg-ports/onnx/binskim.patch — they must stay identical. Verify:
git apply --check cmake/patches/onnx/onnx.patch
patch --binary --ignore-whitespace -p1 --dry-run < cmake/patches/onnx/onnx.patch
sha1sum cmake/patches/onnx/onnx.patch cmake/vcpkg-ports/onnx/binskim.patch # must match
4. Gotchas (the expensive ones — hand-check these)
These are not caught by the automated audit and have bitten real integrations:
(a) The optimizer audit script misses fusion path-matchers.tools/python/find_optimizer_opset_version_updates_required.py only inspects direct kernel
registrations — it does not see opset version lists embedded in optimizer
graph_utils::EdgeEndToMatchpath-matchers. When an op's opset changes, hand-grep the
fusion files and extend the version list. Confirmed sites for Range → 27:
(b) EP base_op_builder.hGetMaxSupportedOpSet must be bumped in lockstep.
Each NPU/coreml/web EP caps the opset it will partition. Bump every one that returns the old
max:
grep -rn 'GetMaxSupportedOpSet' onnxruntime/core/providers/*/builders/impl/base_op_builder.h
# all should return the NEW max opset (e.g. 27)
(c) Fusion IsSupportedOptypeVersionAndDomain version lists (same root cause as a) —
grep all of onnxruntime/core/optimizer/ for the changed op, not just *fusion* files.
(d) The audit script crashes on placeholder macros.find_optimizer_opset_version_updates_required.py has a pre-existing crash (a placeholder
'ver' token gets parsed as an int). Expect it to throw on a clean main; don't treat the
crash as a signal from your change. Run it, but rely on the manual greps in a–c.
(e) OperatorKernels.md regeneration needs a built ORT Python module.gen_opkernel_doc.py imports onnxruntime, so build + install the wheel first (or download
the regenerated markdown from a CI published-artifact, which the dev-notes recommend).
(f) vcpkg artifact mirroring — see §2; --use_vcpkg builds fail to download until done.
Because the vcpkg path is mirror-gated (not self-service), do not rely on it to validate the
onnx.patch rebase. Use the minimal build instead — it is mirror-independent (see §5 and (i)).
(g) Defer-and-filter brand-new, unimplemented ops — and why it is safe.
Do not block the version bump on full kernels for large new ops (e.g. stateful
attention/conv). Exclude them in onnx_backend_test_series_filters.jsonc and track kernels as
follow-up PRs (#25678 deferred TensorScatter/Swish this way). Keeps the bump PR reviewable.
This is safe because ORT failures here are node-local, not model-load-blocking:
ORT kernel matching is per-(op, type-set). Registering an updated op for only a subset
of the new schema's types (e.g. Range-27 with the 5 common numeric types, deferring
fp16/bf16) does not break model load — the ONNX schema validates the model; only the
specific unsupported-type node fails kernel lookup with a clear "kernel not found".
Deferring a brand-new op entirely (no kernel) is likewise node-local: ORT advertises the new
opset because the submodule registers the schemas (operator_sets.h /
DomainToVersionRange::Map()), independent of the transpose-optimizer kMaxSupportedOpset.
The model loads; the unimplemented node fails at kernel-bind. Precedent: TensorScatter
(24), LpNormalization (22, test name test_l2normalization), TreeEnsemble all sit in the filters file as "not implemented".
Optional new schema attributes whose default "has no effect for other types" (e.g.
Range-27 stash_type) can be ignored by the kernel for the registered types — safe to defer.
(h) Function-op test filters — don't over-filter the _expanded variant.
Many new/updated ops are ONNX functions (have SetContextDependentFunctionBodyBuilder) —
e.g. Range-27, CausalConvWithState, LinearAttention. ONNX emits two backend-test
variants: test_<op> and test_<op>_expanded (the decomposed primitive subgraph). ORT can
usually run_expanded via the primitive decomposition even when the fused kernel is
deferred. An unanchored filter like ^test_range_float16_type also drops _expanded,
silently losing real coverage. When deferring an op, in §5/T7 run onnx_test_runner and check
whether the _expanded variants pass; if they do, narrow the filter (anchor it / exclude
only the bare name) to keep coverage. Over-filtering is CI-safe but hides working paths.
(i) On a shared multi-agent branch, read clean main, not the working tree.
Another agent may already have rebased onnx.patch. Inspect with
git show <main-sha>:cmake/patches/onnx/onnx.patch rather than reading the file directly.
(j) A green Linux webgpu CI leg does NOT mean WebGPU ran the node tests.
New ONNX backend node tests (OnnxBackendNodeModelTest) only execute on the
macOS-arm64 webgpu CI leg. The Linux webgpu leg (py-linux-webgpu-stage.yml) is
build-only — it compiles the WebGPU EP but runs no kernels. So a green Linux webgpu
leg proves the build, not that any WebGPU op actually ran. To exercise WebGPU kernels
off-Mac locally, use a software Vulkan adapter (Mesa lavapipe) — see the
webgpu-local-testing skill.
(k) Filter vs. override — pick the right one for a newly-failing node test.
Two test-data files handle failures differently; choosing wrong either hides a real bug
or drops coverage:
onnx_backend_test_series_filters.jsonc = SKIP a test for a real EP bug.
Always cite the tracking issue and a removal condition (when the skip can be
deleted). When only the reference decomposition path is broken, skip just the
_expanded variant — not the bare test (see gotcha h).
onnx_backend_test_series_overrides.jsonc = RELAX ATOL for benign fp16/ULP
differences. This keeps the test running — prefer it over a skip whenever the
kernel is actually correct and the failure is only numeric tolerance. Guardrail:
relax atol only after root-causing the diff as ~1 ULP at the output magnitude or a
few elements (e.g. 5e-4 ≈ 1 fp16 ULP at O(1) values). Unexplained, large, or
growing diffs are bugs to investigate, not override.
(l) New upstream reference tests can EXPOSE latent EP bugs.
A bump pulls in new/updated reference tests that may surface pre-existing EP bugs the
old test set never hit. Example: #28969 — a WebGPU broadcast underflow that ONNX
1.22's expanded-Attention reference tests exposed. Treat such failures as bugs to fix
(or filter-with-issue per gotcha k), not as bump noise.
(m) After a FINAL release, re-seed the vcpkg MS-internal asset mirror or every --use_vcpkg leg 404s.
The MS-internal vcpkg asset mirror (vcpkg.storage.devpackages.microsoft.io) is not
self-service: the new onnx tag tarball must be Terrapin-seeded into it. Until that
lands, every --use_vcpkg CI leg fails the download with an x-block-origin404
(the mirror refuses to proxy an un-seeded asset). This bites at the rc → FINAL re-pin
too — the released vX.Y.0 tag tarball is a different asset hash than the RC, so the
mirror must be re-seeded for the final tag. Treat "seed the tag tarball to the vcpkg
mirror" as a required step of the Phase-2 final re-pin, not a follow-up. (See §2 for the
mirror procedure; the --minimal_build extended gate in §9 is the mirror-independent
stand-in until seeding completes.)
(n) A FINAL onnx release can still ship a map-max opset > last release opset.
"FINAL" does not imply the new opset is released. ONNX 1.22.0 ships
DomainToVersionRangemap-max 27 while the last released opset is 26 — i.e.
opset 27 stays under development for the entire 1.22 cycle. So strict legs (the
default, or ALLOW_RELEASED_ONNX_OPSET_ONLY=1) still throw "Opset N under development"
at model load on any *CurrentOpset test that builds at the map-max opset — even after
the bump is "final". Don't assume the under-development gating ends when the RC does.
(o) Prefer per-model ModelOptions{allow_released_opsets_only=false} over per-leg env flips or GTEST_SKIP.
For *CurrentOpset tests caught by gotcha n, set the relaxation per model via
ModelOptions{/*allow_released_opsets_only*/ false, …} on the Model::Load /
TestGraphTransformer / TransformerTester call. This is leg-agnostic (the test then
exercises the new opset on every CI leg, not just the ones that happen to set the env
var) and preserves opset coverage (unlike GTEST_SKIP, which silently drops it).
Avoid flipping a per-leg CI env var (ALLOW_RELEASED_ONNX_OPSET_ONLY=0) — it only fixes
the legs you remember to touch and leaves the default-strict legs red. Precedent on this
branch: 38f17243b (GatherToSlice), generalized to all *CurrentOpset fusion tests.
Annotate each call site with a one-line WHY + the tracking issue so it can be removed once
the opset is released (#28966).
5. Build & validate locally
The canonical build + test command set lives in §9 (verification gauntlet) — run those to
define "done". This section keeps only the
rationale for the highest-risk gate (don't duplicate the command list here — it drifts):
MERGE GATE for the patch rebase (gotcha a/i + §3): the ONNX_MINIMAL_BUILD hunk in
onnx.patch/binskim.patch is the single highest-risk change and is only exercised when
ONNX_MINIMAL_BUILD=ON — set by build.py --minimal_buildand always by the vcpkg port
(tools/python/util/vcpkg_helpers.py). Since the vcpkg path is mirror-gated (gotcha f), the
--minimal_build extended command (§9 step 2) is the cheap, mirror-independent gate: it
pulls the ONNX archive from cmake/deps.txt (no vcpkg mirror needed) and proves the rebased
minimal hunk configures + compiles + links. Make a green minimal build a required gate
before merging any onnx.patch rebase.
Then update TestCase.cc / onnx_backend_test_series_*.jsonc for newly-introduced failing
node tests. After the PR is up, manually queue every packaging pipeline on the branch, and ask
infra to deploy any new ONNX test data to CI machines (dev-notes).
6. Quick checklist
Group A: deps.txt (zip SHA1), submodule, vcpkg.json, portfile.cmake (tar.gz SHA512), onnx.patch rebased, binskim.patch mirrored byte-identical, all 7 requirements.txt (NOT the 3 transformers-model files frozen at onnx==1.18.0)
Group B: kMaxSupportedOpset, cpu_execution_provider.cc opset block, version-split the changed op in EVERY EP that registers it (cpu+cuda+js, rocm if present) — §1 Group B all-EP tradition, (contrib/dml macros if build demands)
Safety invariant (§11): every new no-kernel op MUST carry an ONNX function body — else its native kernel is a BLOCKER this PR, not a follow-up
Gotchas: fusion path-matchers (embed_layer_norm_fusion.cc, gather_fusion.cc), all 4 EP GetMaxSupportedOpSet, run audit script (expect crash), defer-and-filter new ops (node-local & safe), narrow function-op _expanded filters
Group C: OperatorKernels.md (built module), webgl-operators.md, backend test filters/overrides
Validate: run the §9 verification gauntlet (full build, --minimal_build extended gate, onnxruntime_test_all, onnx_test_runner -e cpu; --use_vcpkg after artifact mirrored)
7. Worked example — ONNX 1.21 → 1.22.0rc1 (a template to copy)
The real values from this session's bump. Replace every value in <...> for the next bump;
the structure stays the same.
Field
This bump (1.21 → 1.22.0rc1)
Where it goes
Source pin
commit bc3be77bec2f628788796dff60819186bacf49df (rel-1.22.0 HEAD; RC has no git tag yet)
submodule + deps.txt URL + portfile REF
deps.txt SHA1
421e5a9afb6c41a54696e424e5b9a3796aab6821 (SHA1 of the .zip)
cmake/deps.txt 3rd field
portfile SHA512
e0c526f50767f376b8ad2ac3dc6b109c65f5b3ed20418fd3c4260a954b796d828a30cb5141a23db9b4db8e4db391bfe5042ef99d141f60bdbdbb991b1f3ce467 (SHA512 of the .tar.gz)
Exact files touched this bump (26 files — use as a coverage checklist):
cmake/deps.txt # zip SHA1 + URL
cmake/external/onnx # submodule -> bc3be77b
cmake/patches/onnx/onnx.patch # rebase: 2 files / 3 @@ hunks — CMakeLists.txt (option decl + ONNX_MINIMAL_BUILD src restructure) + onnx/defs/nn/old.cc (GroupNormalization-18 .Deprecate() removal). Utils.cmake NOT touched (upstream-merged protobuf hunk dropped this bump)
cmake/vcpkg-ports/onnx/binskim.patch # byte-identical mirror of onnx.patch
cmake/vcpkg-ports/onnx/portfile.cmake # REF bc3be77b + tar.gz SHA512
cmake/vcpkg-ports/onnx/vcpkg.json # version-semver + port-version 0
docs/OperatorKernels.md # CPU-only surgical update (full regen = follow-up)
js/web/docs/webgl-operators.md # npm run build:doc
onnxruntime/core/optimizer/embed_layer_norm_fusion.cc # Range path-matcher {1,11,27} (gotcha a)
onnxruntime/core/optimizer/gather_fusion.cc # Range {1,11,27} (gotcha c)
onnxruntime/core/optimizer/transpose_optimization/optimizer_api.h # kMaxSupportedOpset 26->27
onnxruntime/core/providers/cpu/cpu_execution_provider.cc # opset-27 kernel block
onnxruntime/core/providers/cpu/generator/range.cc # Range-27 kernel
onnxruntime/core/providers/{coreml,nnapi,vsinpu,webnn}/.../base_op_builder.h # GetMaxSupportedOpSet ->27 (gotcha b)
onnxruntime/test/optimizer/graph_transform_test.cc # fusion test updates
onnxruntime/test/testdata/onnx_backend_test_series_filters.jsonc # defer-and-filter new ops
onnxruntime/test/python/requirements.txt + 6 CI requirements.txt # onnx==1.22.0rc1 (NOT the 3 frozen at 1.18.0)
8. Hash-recompute one-liners
Both hashes are of the GitHub source archive at the pinned ref, but of different archive
formats — keep them straight:
REF=bc3be77bec2f628788796dff60819186bacf49df # commit (RC) — or v1.22.0 (formal tag)# deps.txt 3rd field = SHA1 of the .ZIP:
curl -sL "https://github.com/onnx/onnx/archive/${REF}.zip" | sha1sum# portfile.cmake SHA512 = SHA512 of the .TAR.GZ:
curl -sL "https://github.com/onnx/onnx/archive/${REF}.tar.gz" | sha512sum
.zip → SHA1 → deps.txt. .tar.gz → SHA512 → portfile. Never cross them.
For a formal release use refs/tags/v<version> in place of the bare commit in both URLs.
⚠️ RC commit and formal tag produce DIFFERENT hashes — recompute is MANDATORY when you
switch REF. GitHub names the archive's top-level directory after the ref
(onnx-<commit-sha>/ for a commit vs onnx-<version>/ for refs/tags/v<version>), so the
archive bytes differ even though the tree content is identical. Never reuse the RC
commit's SHA1/SHA512 for the formal tag — re-run both one-liners above against the tag.
9. Verification gauntlet — what "done" means
Run all of these green before calling a bump complete:
# 1. Full build (deps.txt path):
./build.sh --config RelWithDebInfo --build_wheel --parallel
# 2. Minimal-build gate (proves the rebased ONNX_MINIMAL_BUILD onnx.patch hunk; mirror-independent):
./build.sh --config RelWithDebInfo --minimal_build extended --parallel --skip_tests
# 3. ORT unit tests:
./build/Linux/RelWithDebInfo/onnxruntime_test_all
# 4. ONNX backend node tests for the new opset on CPU EP:
./build/Linux/RelWithDebInfo/onnx_test_runner -e cpu \
build/Linux/RelWithDebInfo/_deps/onnx-src/onnx/backend/test/data/node
(a)ALLOW_RELEASED_ONNX_OPSET_ONLY is ORT-side load-time validation
(onnxruntime/core/graph/model_load_utils.h), not schema registration — the ONNX schemas
for the new opset are always compiled in from the submodule regardless. With the default
=1, ORT rejects at model-load any model whose opset is still "under development" (e.g.
opset 27 during the RC), so the new-opset node tests fail / report "not implemented". Build and
run the gauntlet with ALLOW_RELEASED_ONNX_OPSET_ONLY=0 so ORT loads and runs those
under-development-opset models. (Consistent with §4 gotcha g: schemas come from the
submodule; this flag only governs whether ORT accepts the model at load.)
(b) Expect the new-op node tests you intentionally deferred to be filtered in
onnx_backend_test_series_filters.jsonc — but confirm the _expanded variants still run
(gotcha h): a function op with no native kernel must still PASS via decomposition (§11).
(c)--use_vcpkg build is not a merge gate until the artifact is mirrored (§2); the
minimal build (step 2) is the mirror-independent stand-in that proves the patch rebase.
10. PR-body template (fill in the blanks)
### Bump ONNX to <version> (opset <N>)
Pin: onnx/onnx@<commit-or-tag>. Opset <OLD> → <N>. IR version <unchanged/new>.
**Standing caveats**-**EP `GetMaxSupportedOpSet` bumped to <N>** (coreml/nnapi/vsinpu/webnn). These EPs gain no
new op kernels in this PR; the bump only raises the support ceiling so existing ops on
opset-<N> models partition. New-op kernels for these EPs are follow-ups.
-**`OperatorKernels.md` updated for CPU EP only** (surgical edit). A full multi-EP regen needs
a built ORT module per EP and is tracked as a follow-up (gotcha **e**).
-**Opset <N> is under development** (RC): ORT load-time validation rejects opset-<N> models
unless `ALLOW_RELEASED_ONNX_OPSET_ONLY=0` (schemas are always compiled in from the submodule
— see §9a/§4g). Brand-new ops without kernels are **deferred + filtered**
in `onnx_backend_test_series_filters.jsonc` (node-local, safe — see skill §4 gotcha g).
-**GPU EPs unverified**: only CPU EP was built/tested here. CUDA/DML/etc. opset-<N> coverage
is a follow-up.
**Validation:** full build ✅, `--minimal_build extended` ✅, onnxruntime_test_all ✅,
onnx_test_runner -e cpu (opset-<N> node tests) ✅.
11. SAFETY INVARIANT — no-kernel ops MUST carry a function body
🚨 For every new/updated opset op that you ship WITHOUT a native ORT kernel, confirm the
op carries an ONNX FUNCTION BODY. If it has NO function body, a native kernel is MANDATORY in
THIS PR — it cannot be a follow-up. Otherwise the model loads but the node fails at session
initialization.
"Native kernel" means any registered kernel that binds the opset-N node — including an
open-ended existing kernel (e.g. one registered SinceVersion(13) with no upper bound) that
already covers opset N. Such an op is already kernel-covered and does not trigger the
blocker below; the blocker applies only when no registered kernel binds the new-opset node
and the op has no function body.
Convention (cross-EP consistency) — distinct from the binding-coverage rule above. Even
when an open-ended kernel already binds opset N (so it is not a blocker), still
version-split it — and do so in every EP that registers the op (see the Group B all-EP
tradition). PR #28754 split Range[11,26]+27 in both CPU and CUDA even though CUDA's
SinceVersion(11) kernel already bound opset 27, so the advertised boundary matches the schema
and no EP lags behind CPU. Splitting is about clarity/consistency; binding-coverage is
about correctness — keep the two concerns distinct.
Why (the function-expansion mechanism): an ONNX function op ships a reference
decomposition into primitive ops (SetContextDependentFunctionBodyBuilder /
FunctionBodyHelper). At graph-partition time ORT inlines (expands) any function-op node
that has no registered kernel into its primitive subgraph, which IS kernel-covered — so the op
runs with zero native code. A non-function op has no such fallback: with no binding kernel,
kernel binding fails at session initialization (fail-fast kernel not found), even though
the model loaded (schema came from the submodule — see §4 gotcha g).
⚠️ Scope: runtime function-inlining is a FULL-build behavior. Minimal / mobile /
ORT-format builds do not runtime-inline function ops. The §9 gauntlet only proves the
minimal build compiles (--skip_tests); it never runs a function-op model in a
minimal build. So do not assume the function-inlining fallback gives minimal-build runtime
coverage — a function-only op with no native kernel will not execute in a minimal build.
This is exactly why the 1.22 bump could defer native kernels for CausalConvWithState,
LinearAttention, and Range-27 fp16/bf16 and still pass (in a full build): all three
are ONNX functions, so ORT inlined them. Decision rule per new op:
A binding kernel covers the opset-N node?
Op has ONNX function body?
Action
Yes (incl. open-ended existing kernel)
—
Already covered; done
No
Yes
Safe to defer kernel — ORT inlines (full build); verify the _expanded test passes
No
No
BLOCKER — write the kernel in this PR (op would load then fail at session init)
Quick check: grep the ONNX op's defs.cc for SetContextDependentFunctionBodyBuilder or
FunctionBody; if absent, it is not a function and needs a kernel.
