CI: Apply cpu.light and cpu.heavy job tags

With this change, we will be able to schedule lightweight and heavy jobs on
different runners, thus speeding builds by providing more runners for
lightweight jobs, while controlling cpu resources for each job so that each job
get a fair share.

Signed-off-by: Esben Haabendal <esben.haabendal@huawei.com>

.gitlab-ci.yml

@@ -27,6 +27,18 @@
 # it? Can it be supported by Eclipse Foundation infrastructure?
 #
 
+#
+# Runner tags
+#
+# The meta-openharmony pipeline uses runner tags to control selection of the
+# GitLab CI runners to use for each job
+#
+# cpu.heavy     - Can cause massive CPU load on multi-core systems
+# cpu.light     - Does not cause much CPU load (single-threaded or I/O bound)
+# region.europe - Run in Europe
+# region.china  - Run in China
+# mirror        - Deploy mirror files (combine with region.* tag)
+
 # switch between branch pipelines and merge request pipelines
 workflow:
   rules:
@@ -206,7 +218,12 @@ fetch:
     - job: bitbake-builder
       artifacts: false
       optional: true
+  tags:
+    - cpu.light
   script:
+    # Fetching is io-bound, not cpu-bound, so we should be able to ignore the
+    # runner configured max on build jobs without eating up too much cpu time.
+    - echo "PARALLEL_MAKE = \"-j$(nproc)\"" >> conf/auto.conf
     # Configure build to create mirror tarballs of VCS repositories
     - echo 'BB_GENERATE_MIRROR_TARBALLS = "1"' >> conf/auto.conf
     # Run fetch tasks for all builds
@@ -301,6 +318,8 @@ build:
   after_script:
     - !reference [.bitbake, after_script]
     - time repo/oe-core/scripts/pybootchartgui/pybootchartgui.py build/tmp-*/buildstats/* -o build/tmp-*/buildstats
+  tags:
+    - cpu.heavy
   parallel:
     matrix:
       - DISTRO: [oniro-openharmony-linux]
@@ -328,6 +347,8 @@ ptest:
       when: never
     - when: on_success
   extends: .bitbake
+  tags:
+    - cpu.heavy
   parallel:
     matrix:
       - DISTRO: [oniro-openharmony-linux]
@@ -395,6 +416,8 @@ ohos_fetch:
   image:
     name: $OPENHARMONY_BUILDER:$OPENHARMONY_CONTAINER_VERSION
   extends: .openharmony_tarball
+  tags:
+    - cpu.light
   parallel:
     matrix:
       - OPENHARMONY_VERSION: ["3.0"]
@@ -450,6 +473,8 @@ ohos:
   image:
     name: $OPENHARMONY_BUILDER:$OPENHARMONY_CONTAINER_VERSION
   extends: .openharmony_tarball
+  tags:
+    - cpu.heavy
   script:
     - tar xfz $TARBALL_FILE
     - cd $(basename $TARBALL_FILE .tar.gz)/OpenHarmony

.gitlab-ci/container.yml

@@ -29,6 +29,8 @@ variables:
     entrypoint: [""]
   variables:
     CONTAINER_DOCKERFILE: Dockerfile
+  tags:
+    - cpu.light
   script:
     - CONTEXT="$CI_PROJECT_DIR/.gitlab-ci/container/$CONTAINER_PATH"
     - DOCKERFILE="$CONTEXT/$CONTAINER_DOCKERFILE"