switch C# benchmark to coreclr

tools/run_tests/performance/build_performance.sh

@@ -54,6 +54,9 @@ do
   "go")
     tools/run_tests/performance/build_performance_go.sh
     ;;
+  "csharp")
+    tools/run_tests/run_tests.py -l $language -c $CONFIG --build_only -j 8 --compiler coreclr
+    ;;
   *)
     tools/run_tests/run_tests.py -l $language -c $CONFIG --build_only -j 8
     ;;

tools/run_tests/performance/kill_workers.sh

@@ -40,6 +40,7 @@ killall -9 qps_worker || true
 
 # C#
 ps -C mono -o pid=,cmd= | grep QpsWorker | awk '{print $1}' | xargs kill -9 || true
+ps -C dotnet -o pid=,cmd= | grep QpsWorker | awk '{print $1}' | xargs kill -9 || true
 
 # Ruby
 ps -C ruby -o pid=,cmd= | grep 'qps/worker.rb' | awk '{print $1}' | xargs kill -9 || true

tools/run_tests/performance/run_worker_csharp.sh

@@ -33,6 +33,6 @@ set -ex
 cd $(dirname $0)/../../..
 
 # needed to correctly locate testca
-cd src/csharp/Grpc.IntegrationTesting.QpsWorker/bin/Release
+cd src/csharp/Grpc.IntegrationTesting.QpsWorker/bin/Release/netcoreapp1.0
 
-mono Grpc.IntegrationTesting.QpsWorker.exe $@
+dotnet exec Grpc.IntegrationTesting.QpsWorker.dll $@