[watzon]

What changes

Before: the local cleanup model crashed on any x86_64 processor without AVX2 (#37). llama.cpp in sayso-cleanup is built with GGML_NATIVE=OFF, and ggml then turns on AVX, AVX2, FMA, F16C and BMI2 by default, so the runtime died with SIGILL at the first load and Settings showed only "signal 4".

After: x86_64 packages ship three builds of the cleanup runtime, sayso-cleanup (AVX2, FMA, F16C, BMI2), sayso-cleanup-avx (AVX, SSE 4.2) and sayso-cleanup-baseline (plain x86-64), and the app starts the best one this processor runs. If a runtime still stops on an illegal instruction, Settings says the processor can't run the local model in this version and suggests updating or using a cloud provider.

How:

• crates/sayso-core/src/cpu.rs names the builds and picks one with is_x86_feature_detected! (shared by the cleanup and engine clients). runtime.rs maps SIGILL (signal 4 on Unix, 0xC000001D on Windows) to a new RuntimeError::UnsupportedCpu, and refuses up front to start a known build this CPU can't run (unless SAYSO_CLEANUP_PATH is set).
• scripts/build-cleanup.sh builds the three variants with GGML_*=OFF env vars, each in its own target dir. bundle-linux.sh uses it; bundle-windows.ps1 does the same for the three .exe files. The deb/rpm, AUR, Nix, install.sh, Inno Setup uninstall and AppImage glibc check all take sayso-cleanup*.
• The Linux engine builds parakeet.cpp's ggml with GGML_NATIVE=OFF too, so it had the same AVX2 default. Its CPU backend is now built for plain x86-64 (the models run on Vulkan, so the CPU side matters little for speed).
• scripts/test-cleanup-cpus.sh runs each build under qemu-x86_64 -cpu (Haswell, SandyBridge, Nehalem, qemu64) on a tiny random GGUF from scripts/tiny-gguf.py, and checks that the AVX2 build does stop on SandyBridge.
• New string cleanup_test_failed_cpu_detail in all 10 locales.

Windows speech engine

Before: whisper-rs-sys leaves GGML_NATIVE on, so MSVC built whisper.cpp in sayso-engine.exe for the CI runner's CPU. The 0.13.0 exe uses AVX2, FMA and F16C instructions, so Whisper models on Windows probably crash the engine on a processor without AVX2, and the supervisor reloads the model after each restart.

After: the Windows bundle has sayso-engine.exe (AVX2, FMA, F16C, BMI2), sayso-engine-avx.exe and sayso-engine-baseline.exe, and the app starts the best one this processor runs. If a model still stops the engine on an illegal instruction, it shows as failed with a new reason, "The processor of this computer cannot run this model in this version of Sayso", and the engine isn't asked to load it again.

How:

• bundle-windows.ps1 sets GGML_NATIVE=OFF and builds the engine three times, each in its own target dir, then copies and signs all three. package-engine.ps1 puts all three in the engine zip, and the Inno Setup uninstaller quits all three.
• sayso-engine-client picks the build with sayso_core::cpu::best_in (unless SAYSO_ENGINE_PATH is set). On an illegal-instruction exit it marks the model that was running Failed { reason: UnsupportedCpu }, drops it from the models it reloads after a restart, and fails later requests for it without touching the engine.
• New reason code unsupported_cpu (set by the client, never sent by an engine) with its string in all 10 locales.
• sayso-engine-sdk's find_engine picks the best build in a Windows release folder. It keeps its own copy of the CPU check, since the SDK may only depend on sayso-protocol.
• The fake engine can run a real illegal instruction (ud2) for a marked model, and a new test drives the whole crash, restart and fail-fast path.

Fixes #37.

How you checked it

These ran on Linux x86_64 in a cloud container, not on a Mac.

• cargo test -p sayso-cleanup-client and cargo test -p sayso-i18n; the client CPU tests also under qemu-x86_64 -cpu SandyBridge and qemu64
• cargo test -p sayso-engine-client (one test, vad_and_diarization_models_download_with_their_engine_object, fails here on the base commit too), cargo test -p sayso-core cpu::, the sayso-engine-sdk lib tests and the sayso-app engine_text tests
• cargo clippy -p sayso-core -p sayso-engine-client -p sayso-cleanup-client -p sayso-app -p sayso-engine-sdk --all-targets -- -D warnings
• cargo check --target x86_64-pc-windows-gnu for sayso-core, sayso-engine-sdk, sayso-engine-client and sayso-cleanup-client
• scripts/check-deps.sh
• I ran the app and used the changed feature

Reproduced #37 with the 0.13.0 release sayso-cleanup under qemu-x86_64 -cpu SandyBridge (hello works, load dies with signal 4), then built the three variants with scripts/build-cleanup.sh and ran scripts/test-cleanup-cpus.sh against them.

For the Windows engine, I built whisper.cpp's ggml (the copy vendored in whisper-rs-sys 0.15.0) with the same three flag sets on Linux and ran F16, Q8_0, Q5_0 and Q4_K matrix products under QEMU: each build matched an f32 reference on the oldest CPU it's for, the AVX2 build died with SIGILL on SandyBridge and the AVX build on Nehalem. objdump shows no ymm in the baseline build and no FMA or F16C in the AVX build.

Not verified: no real pre-AVX2 hardware (QEMU only); the ggml check used GCC, not MSVC, so the MSVC flag mapping is untested until the Windows CI job; sayso-engine couldn't be built here (its native downloads are blocked in this container), so the parakeet.cpp change is untested until CI; bundle-windows.ps1, package-engine.ps1 and the Inno Setup changes weren't run here. The Windows job now builds the engine three times, so it takes longer.

Workflow change to add by hand

The push token can't change files under .github/workflows, so this part isn't in the branch. It makes the Linux workflow check that every sayso-cleanup* build is installed and answers hello, and runs scripts/test-cleanup-cpus.sh on x86_64. Apply it with git apply on this branch.

.github/workflows/linux.yml

diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 7817c9c..c4a52e5 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -32,6 +32,9 @@ on:
       - '.github/workflows/linux.yml'
       - 'packaging/linux/**'
       - 'scripts/bundle-linux.sh'
+      - 'scripts/build-cleanup.sh'
+      - 'scripts/test-cleanup-cpus.sh'
+      - 'scripts/tiny-gguf.py'
       - 'scripts/package-linux.sh'
       - 'scripts/package-engine.sh'
       - 'packaging/engine/**'
@@ -218,20 +221,41 @@ jobs:
           done
 
       # The cleanup runtime needs no model to answer hello, and its backend
-      # is the CPU on Linux. It must not need libgomp (OpenMP is off).
+      # is the CPU on Linux. It must not need libgomp (OpenMP is off). On
+      # x86_64 there are three builds (scripts/build-cleanup.sh).
       - name: Start the installed cleanup runtime
         shell: bash
         run: |
-          runtime=/usr/lib/sayso/sayso-cleanup
-          deps=$(ldd "$runtime")
-          echo "$deps"
-          if grep -qE 'libgomp|not found' <<< "$deps"; then
-            echo "::error::The cleanup runtime has a library that it must not have, or one that is missing."
-            exit 1
+          for runtime in /usr/lib/sayso/sayso-cleanup*; do
+            echo "== $runtime"
+            deps=$(ldd "$runtime")
+            echo "$deps"
+            if grep -qE 'libgomp|not found' <<< "$deps"; then
+              echo "::error::$runtime has a library that it must not have, or one that is missing."
+              exit 1
+            fi
+            reply=$(printf '{"v":1,"id":"1","type":"hello"}\n' | timeout 20 "$runtime")
+            echo "$reply"
+            [[ "$reply" == *'"type":"hello"'*'"backend":"cpu"'* ]] || { echo "::error::$runtime gave no hello reply with the cpu backend."; exit 1; }
+          done
+          if [[ "${{ matrix.arch }}" == x86_64 ]]; then
+            for build in sayso-cleanup-avx sayso-cleanup-baseline; do
+              [[ -x /usr/lib/sayso/$build ]] || { echo "::error::The package has no $build."; exit 1; }
+            done
           fi
-          reply=$(printf '{"v":1,"id":"1","type":"hello"}\n' | timeout 20 "$runtime")
-          echo "$reply"
-          [[ "$reply" == *'"type":"hello"'*'"backend":"cpu"'* ]] || { echo "::error::The cleanup runtime gave no hello reply with the cpu backend."; exit 1; }
+
+      # Each x86_64 build of the cleanup runtime loads a model and completes
+      # text on the oldest processor that it is for, under QEMU, and the AVX2
+      # build stops on a processor without AVX2 (issue #37).
+      - name: Run the cleanup runtime builds on older processors
+        if: matrix.arch == 'x86_64'
+        shell: bash
+        run: |
+          DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends qemu-user python3-venv
+          python3 -m venv "$RUNNER_TEMP/venv"
+          "$RUNNER_TEMP/venv/bin/pip" install --quiet gguf==0.19.0 numpy
+          "$RUNNER_TEMP/venv/bin/python" scripts/tiny-gguf.py "$RUNNER_TEMP/tiny.gguf"
+          scripts/test-cleanup-cpus.sh /usr/lib/sayso "$RUNNER_TEMP/tiny.gguf"
 
       - name: Keep the packages
         uses: actions/upload-artifact@v4

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