Update dotnet docker images to .NET 7 and enable dynamic PGO (#321)

* Update dotnet docker images to .NET 7 and enable dynamic PGO

* Update

Author: JamesNK

containers/init/build/dotnet/Dockerfile

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM mcr.microsoft.com/dotnet/sdk:6.0-bullseye-slim
+FROM mcr.microsoft.com/dotnet/sdk:7.0-bullseye-slim
 
 RUN mkdir -p /src/workspace
 WORKDIR /src/workspace

containers/pre_built_workers/dotnet/Dockerfile

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM mcr.microsoft.com/dotnet/sdk:6.0-bullseye-slim
+FROM mcr.microsoft.com/dotnet/sdk:7.0-bullseye-slim
 
 RUN mkdir -p /pre
 WORKDIR /pre
@@ -40,7 +40,13 @@ RUN dotnet publish -c Release -o qps_worker perf/benchmarkapps/QpsWorker/
 
 # Note that the QpsWorker built by "dotnet publish" in the previous step needs to be runnable
 # with the runtime image below.
-FROM mcr.microsoft.com/dotnet/aspnet:6.0-bullseye-slim
+FROM mcr.microsoft.com/dotnet/aspnet:7.0-bullseye-slim
+
+# Enable dynamic profile-guided optimization
+# https://gist.github.com/EgorBo/dc181796683da3d905a5295bfd3dd95b
+ENV DOTNET_ReadyToRun=0
+ENV DOTNET_TieredPGO=1
+ENV DOTNET_TC_QuickJitForLoops=1
 
 RUN mkdir -p /execute
 WORKDIR /execute

containers/runtime/dotnet/Dockerfile

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM mcr.microsoft.com/dotnet/aspnet:6.0-bullseye-slim
+FROM mcr.microsoft.com/dotnet/aspnet:7.0-bullseye-slim
 
 RUN mkdir -p /src/workspace
 WORKDIR /src/workspace