ci: split pipelining into fast + stress jobs

Fast tests (loop_count ≤ 1000, 97 tests, ~10 min) run as required check.
Stress tests (loop_count=100000, 12 tests, ~25-40 min) run as
continue-on-error soak test so slow runs don't block PRs.

Also updates README badges to match the two new job names.

Author: simonCatBot

.github/workflows/conformance.yml

@@ -398,12 +398,30 @@ jobs:
           timeout 120 ./bin/vx_test_conformance --filter="UserDataObject.*"
 
   # Pipelining, Streaming & Batch Processing KHR extension.
-  # The full GraphPipeline.* suite (110 tests, 12 with loop_count=100000)
-  # takes ~25-40 min on CI runners. Set continue-on-error so a slow run
-  # does not block the PR — the fast tests still exercise all 12 API
-  # functions; the stress iterations are a soak test.
-  pipelining:
-    name: "KHR extension: pipelining"
+  # Split into fast (loop_count ≤ 1000) and stress (loop_count=100000)
+  # so slow stress tests don't block the PR. Fast tests cover all APIs.
+  pipelining-fast:
+    name: "KHR: pipelining (fast)"
+    runs-on: ubuntu-22.04
+    needs: build
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      - name: Download build artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: build-artifacts
+      - name: Run Pipelining fast tests
+        run: |
+          chmod +x OpenVX-cts/build/bin/vx_test_conformance
+          cd OpenVX-cts/build
+          export LD_LIBRARY_PATH=${{ github.workspace }}/target/release
+          export VX_TEST_DATA_PATH=${{ github.workspace }}/OpenVX-cts/test_data/
+          timeout 900 ./bin/vx_test_conformance --filter="GraphPipeline.*:-*loop_count=100000*"
+
+  pipelining-stress:
+    name: "KHR: pipelining (stress)"
     runs-on: ubuntu-22.04
     needs: build
     continue-on-error: true
@@ -415,13 +433,13 @@ jobs:
         uses: actions/download-artifact@v4
         with:
           name: build-artifacts
-      - name: Run Pipelining KHR extension tests
+      - name: Run Pipelining stress tests
         run: |
           chmod +x OpenVX-cts/build/bin/vx_test_conformance
           cd OpenVX-cts/build
           export LD_LIBRARY_PATH=${{ github.workspace }}/target/release
           export VX_TEST_DATA_PATH=${{ github.workspace }}/OpenVX-cts/test_data/
-          timeout 2400 ./bin/vx_test_conformance --filter="GraphPipeline.*"
+          timeout 3600 ./bin/vx_test_conformance --filter="GraphPipeline.*loop_count=100000*"
 
   image-ops:
     runs-on: ubuntu-22.04

README.md

@@ -281,7 +281,8 @@ GitHub Actions builds and runs the full CTS on every push and pull request. The
 | **vision-statistics** | MeanStdDev, MinMaxLoc, Integral | [![vision-statistics](https://img.shields.io/github/check-runs/kiritigowda/rustVX/main?nameFilter=vision-statistics&label=)](https://github.com/kiritigowda/rustVX/actions/workflows/conformance.yml?query=branch%3Amain) |
 | **vision-pyramid** | GaussianPyramid, LaplacianPyramid, LaplacianReconstruct, OptFlowPyrLK | [![vision-pyramid](https://img.shields.io/github/check-runs/kiritigowda/rustVX/main?nameFilter=vision-pyramid&label=)](https://github.com/kiritigowda/rustVX/actions/workflows/conformance.yml?query=branch%3Amain) |
 | **user-data-object** | UserDataObject (14 tests) | [![user-data-object](https://img.shields.io/github/check-runs/kiritigowda/rustVX/main?nameFilter=user-data-object&label=)](https://github.com/kiritigowda/rustVX/actions/workflows/conformance.yml?query=branch%3Amain) |
-| **pipelining** | GraphPipeline (81 tests) | [![pipelining](https://img.shields.io/github/check-runs/kiritigowda/rustVX/main?nameFilter=pipelining&label=)](https://github.com/kiritigowda/rustVX/actions/workflows/conformance.yml?query=branch%3Amain) |
+| **pipelining-fast** | GraphPipeline (fast: 97 tests) | [![pipelining-fast](https://img.shields.io/github/check-runs/kiritigowda/rustVX/main?nameFilter=pipelining-fast&label=)](https://github.com/kiritigowda/rustVX/actions/workflows/conformance.yml?query=branch%3Amain) |
+| **pipelining-stress** | GraphPipeline (stress: 12 tests) | [![pipelining-stress](https://img.shields.io/github/check-runs/kiritigowda/rustVX/main?nameFilter=pipelining-stress&label=)](https://github.com/kiritigowda/rustVX/actions/workflows/conformance.yml?query=branch%3Amain) |
 | **Enhanced-Vision: Feature Extraction** | HOGCells, HOGFeatures, MatchTemplate, LBP (44 tests) | [![Enhanced-Vision: Feature Extraction](https://img.shields.io/github/check-runs/kiritigowda/rustVX/main?nameFilter=Enhanced-Vision%3A%20Feature%20Extraction&label=)](https://github.com/kiritigowda/rustVX/actions/workflows/conformance.yml?query=branch%3Amain) |
 | **Enhanced-Vision: Post-Processing** | Copy, NonMaxSuppression, HoughLinesP (84 tests) | [![Enhanced-Vision: Post-Processing](https://img.shields.io/github/check-runs/kiritigowda/rustVX/main?nameFilter=Enhanced-Vision%3A%20Post-Processing&label=)](https://github.com/kiritigowda/rustVX/actions/workflows/conformance.yml?query=branch%3Amain) |
 | **Enhanced-Vision: Tensor Arithmetic** | TensorOp, Min, Max (222 tests) | [![Enhanced-Vision: Tensor Arithmetic](https://img.shields.io/github/check-runs/kiritigowda/rustVX/main?nameFilter=Enhanced-Vision%3A%20Tensor%20Arithmetic&label=)](https://github.com/kiritigowda/rustVX/actions/workflows/conformance.yml?query=branch%3Amain) |