[LesnyRumcajs#128] add Shared Class Cache (SCC) for OpenJ9.

arvi9 · May 11, 2021 · 33bb527 · 33bb527
1 parent d66b854
commit 33bb527
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diff --git a/detailed/java_openj9_grpc_balanced_bench/Dockerfile b/detailed/java_openj9_grpc_balanced_bench/Dockerfile
@@ -9,4 +9,7 @@ RUN /app/gradlew installDist
 ENV GC "-Xpolicy:balanced"
 ENV JAVA_OPTS "${GC} -XX:MinRAMPercentage=70 -XX:MaxRAMPercentage=70"
 
+RUN /app/populate_scc.sh
+ENV JAVA_OPTS "${JAVA_OPTS} -Xshareclasses:name=grcp,cacheDir=/app/.classCache"
+
 ENTRYPOINT [ "/app/build/install/examples/bin/hello-world-server" ]
diff --git a/detailed/java_openj9_grpc_metronome_bench/Dockerfile b/detailed/java_openj9_grpc_metronome_bench/Dockerfile
@@ -9,4 +9,7 @@ RUN /app/gradlew installDist
 ENV GC "-Xpolicy:metronome"
 ENV JAVA_OPTS "${GC} -XX:MinRAMPercentage=70 -XX:MaxRAMPercentage=70"
 
+RUN /app/populate_scc.sh
+ENV JAVA_OPTS "${JAVA_OPTS} -Xshareclasses:name=grcp,cacheDir=/app/.classCache"
+
 ENTRYPOINT [ "/app/build/install/examples/bin/hello-world-server" ]
diff --git a/detailed/java_openj9_grpc_nogc_bench/Dockerfile b/detailed/java_openj9_grpc_nogc_bench/Dockerfile
@@ -9,4 +9,7 @@ RUN /app/gradlew installDist
 ENV GC "-Xpolicy:nogc"
 ENV JAVA_OPTS "${GC} -XX:MinRAMPercentage=70 -XX:MaxRAMPercentage=70"
 
+RUN /app/populate_scc.sh
+ENV JAVA_OPTS "${JAVA_OPTS} -Xshareclasses:name=grcp,cacheDir=/app/.classCache"
+
 ENTRYPOINT [ "/app/build/install/examples/bin/hello-world-server" ]
diff --git a/detailed/java_openj9_grpc_optavgpause_bench/Dockerfile b/detailed/java_openj9_grpc_optavgpause_bench/Dockerfile
@@ -9,4 +9,7 @@ RUN /app/gradlew installDist
 ENV GC "-Xpolicy:optavgpause"
 ENV JAVA_OPTS "${GC} -XX:MinRAMPercentage=70 -XX:MaxRAMPercentage=70"
 
+RUN /app/populate_scc.sh
+ENV JAVA_OPTS "${JAVA_OPTS} -Xshareclasses:name=grcp,cacheDir=/app/.classCache"
+
 ENTRYPOINT [ "/app/build/install/examples/bin/hello-world-server" ]
diff --git a/detailed/java_openj9_grpc_optthruput_bench/Dockerfile b/detailed/java_openj9_grpc_optthruput_bench/Dockerfile
@@ -9,4 +9,7 @@ RUN /app/gradlew installDist
 ENV GC "-Xpolicy:optthruput"
 ENV JAVA_OPTS "${GC} -XX:MinRAMPercentage=70 -XX:MaxRAMPercentage=70"
 
+RUN /app/populate_scc.sh
+ENV JAVA_OPTS "${JAVA_OPTS} -Xshareclasses:name=grcp,cacheDir=/app/.classCache"
+
 ENTRYPOINT [ "/app/build/install/examples/bin/hello-world-server" ]
diff --git a/java_openj9_grpc_gencon_bench/Dockerfile b/java_openj9_grpc_gencon_bench/Dockerfile
@@ -9,4 +9,7 @@ RUN /app/gradlew installDist
 ENV GC "-Xpolicy:gencon"
 ENV JAVA_OPTS "${GC} -XX:MinRAMPercentage=70 -XX:MaxRAMPercentage=70"
 
+RUN /app/populate_scc.sh
+ENV JAVA_OPTS "${JAVA_OPTS} -Xshareclasses:name=grcp,cacheDir=/app/.classCache"
+
 ENTRYPOINT [ "/app/build/install/examples/bin/hello-world-server" ]
diff --git a/java_openj9_grpc_gencon_bench/populate_scc.sh b/java_openj9_grpc_gencon_bench/populate_scc.sh
@@ -0,0 +1,41 @@
+#!/bin/bash
+if [ "$VERBOSE" != "true" ]; then
+  exec &>/dev/null
+fi
+
+set -Eeox pipefail
+
+SCC_SIZE="64m"  # Default size of the SCC layer.
+ITERATIONS=2    # Number of iterations to run to populate it.
+
+SCC="-Xshareclasses:name=grcp,cacheDir=/app/.classCache"
+
+OPENJ9_JAVA_OPTIONS="${JAVA_OPTS[@]} $SCC"
+CREATE_LAYER="$OPENJ9_JAVA_OPTIONS,createLayer,groupAccess"
+DESTROY_LAYER="$OPENJ9_JAVA_OPTIONS,destroy"
+PRINT_LAYER_STATS="$OPENJ9_JAVA_OPTIONS,printTopLayerStats"
+
+OLD_UMASK=`umask`
+umask 002 # 002 is required to provide group rw permission to the cache when `-Xshareclasses:groupAccess` options is used
+
+# Explicity create a class cache layer for this image layer here rather than allowing
+# `server start` to do it, which will lead to problems because multiple JVMs will be started.
+java $CREATE_LAYER -Xscmx$SCC_SIZE -version
+
+# Populate the newly created class cache layer.
+set +e
+for ((i=0; i<$ITERATIONS; i++))
+do
+ /app/build/install/examples/bin/hello-world-server &
+ # this would be much beneficial
+ #/app/build/install/examples/bin/hello-world-client &
+ pkill java
+done
+set -e
+
+# restore umask
+umask ${OLD_UMASK}
+
+# Tell the user how full the final layer is.
+FULL=`( java $PRINT_LAYER_STATS || true ) 2>&1 | awk '/^Cache is [0-9.]*% .*full/ {print substr($3, 1, length($3)-1)}'`
+echo "SCC layer is $FULL% full."