Only perform a build for the vision_p6 PR presubmit checks (do not run the tests) (#405)

* Add option to only do a build for the vision_p6.

BUG=http://b/196459172

* Only build for Vision P6 as part of presubmit checks.

* make running the tests optional.

* fix whitespace.

* Address review comments.

.github/workflows/xtensa.yml

@@ -55,22 +55,37 @@ jobs:
           echo ${{ secrets.TFLM_BOT_PACKAGE_READ_TOKEN }} | docker login ghcr.io -u tflm-bot --password-stdin
           docker run --rm -v `pwd`:/opt/tflite-micro ghcr.io/tflm-bot/xtensa:0.1 /opt/tflite-micro/tensorflow/lite/micro/tools/ci_build/test_xtensa_hifi5.sh
 
+  vision_p6_presubmit:
+    runs-on: ubuntu-latest
+
+    if: |
+      github.event_name == 'workflow_dispatch' ||
+      (github.event_name == 'pull_request_target' && contains(github.event.pull_request.labels.*.name, 'ci:run'))
+
+    name: Vision P6 Build (presubmit)
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+      - run: |
+          echo ${{ secrets.TFLM_BOT_PACKAGE_READ_TOKEN }} | docker login ghcr.io -u tflm-bot --password-stdin
+          docker run --rm -v `pwd`:/opt/tflite-micro ghcr.io/tflm-bot/xtensa:0.1 /opt/tflite-micro/tensorflow/lite/micro/tools/ci_build/test_xtensa_vision_p6.sh
+
   vision_p6_unit_tests:
     runs-on: ubuntu-latest
 
     if: |
       github.event_name == 'workflow_dispatch' ||
-      (github.event_name == 'pull_request_target' && contains(github.event.pull_request.labels.*.name, 'ci:run')) ||
       (github.event_name == 'schedule' && github.repository == 'tensorflow/tflite-micro')
 
-    name: Vision P6 Unit Tests (presubmit)
+    name: Vision P6 Unit Tests (nightly)
     steps:
       - uses: actions/checkout@v2
         with:
           ref: ${{ github.event.pull_request.head.sha }}
       - run: |
           echo ${{ secrets.TFLM_BOT_PACKAGE_READ_TOKEN }} | docker login ghcr.io -u tflm-bot --password-stdin
-          docker run --rm -v `pwd`:/opt/tflite-micro ghcr.io/tflm-bot/xtensa:0.1 /opt/tflite-micro/tensorflow/lite/micro/tools/ci_build/test_xtensa_vision_p6.sh
+          docker run --rm -v `pwd`:/opt/tflite-micro ghcr.io/tflm-bot/xtensa:0.1 /opt/tflite-micro/tensorflow/lite/micro/tools/ci_build/test_xtensa_vision_p6.sh RUN_TESTS
 
   hifi_3z_unit_tests:
     runs-on: ubuntu-latest

tensorflow/lite/micro/tools/ci_build/test_xtensa_vision_p6.sh

@@ -28,9 +28,22 @@ readable_run make -f tensorflow/lite/micro/tools/make/Makefile clean
 # TODO(b/143904317): downloading first to allow for parallel builds.
 readable_run make -f tensorflow/lite/micro/tools/make/Makefile third_party_downloads
 
-readable_run make -f tensorflow/lite/micro/tools/make/Makefile \
-  TARGET=xtensa \
-  TARGET_ARCH=vision_p6 \
-  OPTIMIZED_KERNEL_DIR=xtensa \
-  XTENSA_CORE=P6_200528 \
-  test -j$(nproc)
+# Since we currently do not have optimized kernel implemetations for vision_p6,
+# running the tests (in particular person_detection_int8) takes a very long
+# time. So, we have changed the default for this script to only perform a build
+# and added an option to run all the tests when that is feasible.
+if [[ ${1} == "RUN_TESTS" ]]; then
+  readable_run make -f tensorflow/lite/micro/tools/make/Makefile \
+    TARGET=xtensa \
+    TARGET_ARCH=vision_p6 \
+    OPTIMIZED_KERNEL_DIR=xtensa \
+    XTENSA_CORE=P6_200528 \
+    test -j$(nproc)
+else
+  readable_run make -f tensorflow/lite/micro/tools/make/Makefile \
+    TARGET=xtensa \
+    TARGET_ARCH=vision_p6 \
+    OPTIMIZED_KERNEL_DIR=xtensa \
+    XTENSA_CORE=P6_200528 \
+    build -j$(nproc)
+fi