Tweak CCI config (#603)

* Bust cache weekly

* Rename directory for utility

* Show 20 slowest tests

* fixup! Show 20 slowest tests

.circleci/config.yml

@@ -240,17 +240,21 @@ jobs:
     resource_class: 2xlarge+
     steps:
       - checkout
+      - run:
+          name: Generate cache key
+          # This will refresh cache on Sundays, nightly build should generate new cache.
+          command: echo "$(date +"%Y-%U")" > .circleci-weekly
       - restore_cache:
 
           keys:
-            - env-v1-linux-{{ arch }}-py<< parameters.python_version >>-{{ checksum ".circleci/unittest/scripts/environment.yml" }}
+            - env-v1-linux-{{ arch }}-py<< parameters.python_version >>-{{ checksum ".circleci/unittest/scripts/environment.yml" }}-{{ checksum ".circleci-weekly" }}
 
       - run:
           name: Setup
           command: .circleci/unittest/scripts/setup_env.sh
       - save_cache:
 
-          key: env-v1-linux-{{ arch }}-py<< parameters.python_version >>-{{ checksum ".circleci/unittest/scripts/environment.yml" }}
+          key: env-v1-linux-{{ arch }}-py<< parameters.python_version >>-{{ checksum ".circleci/unittest/scripts/environment.yml" }}-{{ checksum ".circleci-weekly" }}
 
           paths:
             - conda

.circleci/config.yml.in

@@ -240,17 +240,21 @@ jobs:
     resource_class: 2xlarge+
     steps:
       - checkout
+      - run:
+          name: Generate cache key
+          # This will refresh cache on Sundays, nightly build should generate new cache.
+          command: echo "$(date +"%Y-%U")" > .circleci-weekly
       - restore_cache:
           {% raw %}
           keys:
-            - env-v1-linux-{{ arch }}-py<< parameters.python_version >>-{{ checksum ".circleci/unittest/scripts/environment.yml" }}
+            - env-v1-linux-{{ arch }}-py<< parameters.python_version >>-{{ checksum ".circleci/unittest/scripts/environment.yml" }}-{{ checksum ".circleci-weekly" }}
           {% endraw %}
       - run:
           name: Setup
           command: .circleci/unittest/scripts/setup_env.sh
       - save_cache:
           {% raw %}
-          key: env-v1-linux-{{ arch }}-py<< parameters.python_version >>-{{ checksum ".circleci/unittest/scripts/environment.yml" }}
+          key: env-v1-linux-{{ arch }}-py<< parameters.python_version >>-{{ checksum ".circleci/unittest/scripts/environment.yml" }}-{{ checksum ".circleci-weekly" }}
           {% endraw %}
           paths:
             - conda

.circleci/unittest/scripts/run_test.sh

@@ -6,5 +6,5 @@ eval "$(./conda/bin/conda shell.bash hook)"
 conda activate ./env
 
 python -m torch.utils.collect_env
-pytest --cov=torchaudio --junitxml=test-results/junit.xml -v test
+pytest --cov=torchaudio --junitxml=test-results/junit.xml -v --durations 20 test
 flake8 torchaudio test