Fix benchmark by making sure we use Python 3 (#9170)
The benchmark runs have been failing since we started requiring Python
3, so this changes fixes the benchmarks by ensuring we always use Python
3.
diff --git a/kokoro/linux/benchmark/run.sh b/kokoro/linux/benchmark/run.sh
index 502f436..acd8737 100755
--- a/kokoro/linux/benchmark/run.sh
+++ b/kokoro/linux/benchmark/run.sh
@@ -23,8 +23,10 @@
./configure CXXFLAGS="-fPIC -O2"
make -j8
pushd python
-python setup.py build --cpp_implementation
-pip install . --user
+virtualenv -p python3 env
+source env/bin/activate
+python3 setup.py build --cpp_implementation
+pip3 install --install-option="--cpp_implementation" .
popd
# build and run Python benchmark
@@ -91,7 +93,7 @@
# print the postprocessed results to the build job log
# TODO(jtattermusch): re-enable uploading results to bigquery (it is currently broken)
make python_add_init
-env LD_LIBRARY_PATH="${repo_root}/src/.libs" python -m util.result_parser \
+env LD_LIBRARY_PATH="${repo_root}/src/.libs" python3 -m util.result_parser \
-cpp="../tmp/cpp_result.json" -java="../tmp/java_result.json" -python="../tmp/python_result.json"
popd
