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#!/usr/bin/env bash
# Copyright 2016 The TensorFlow Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ==============================================================================
#
#
# A script to run multiple GPU tests in parallel controlled with an environment
# variable. This script will assume that when it runs, one of the locks are
# already released. So the program calling this script is expected to make sure
# that only $TF_GPU_COUNT processes are running at any gien time.
#
# Required environment variables:
# TF_GPU_COUNT = Number of GPUs available. This HAS TO BE IN SYNC with the
# value of --local_test_jobs flag for bazel.
TF_GPU_COUNT=${TF_GPU_COUNT:-8}
for i in `seq 0 $((TF_GPU_COUNT-1))`; do
exec {lock_fd}>/var/lock/gpulock$i || exit 1
if flock -n "$lock_fd";
then
(
# This export only works within the brackets, so it is isolated to one
# single command.
export CUDA_VISIBLE_DEVICES=$i
echo "Running test $@ on GPU $CUDA_VISIBLE_DEVICES"
$@
)
return_code=$?
flock -u "$lock_fd"
exit $return_code
fi
done
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