Keep warm wasm workers alive

scripts/test_dependency_invalidation.sh

@@ -29,8 +29,8 @@ printf '%s\n' \
 	'#endif' >"$source_dir/child.uce"
 printf '%s\n' \
 	'#load "child.uce"' \
-	'CLI(Request& context) { print(dependency_cache_marker()); }' \
-	'RENDER(Request& context) { print(dependency_cache_marker()); }' >"$source_dir/parent.uce"
+	'CLI(Request& context) { print(dependency_cache_marker(), ":", request_perf()["worker_pid"].to_string()); }' \
+	'RENDER(Request& context) { print(dependency_cache_marker(), ":", request_perf()["worker_pid"].to_string()); }' >"$source_dir/parent.uce"
 
 assert_marker() {
 	local path="$1"
@@ -62,4 +62,17 @@ touch -d "@$parent_mtime" "$parent_wasm"
 rm -f "$cache_dir/parent.uce.cwasm"
 for _ in {1..16}; do assert_marker parent dependency-marker-c; done
 
+worker_count=$(awk -F= '/^[[:space:]]*WORKER_COUNT[[:space:]]*=/ {gsub(/^[[:space:]]+|[[:space:]]+$/, "", $2); print $2; exit}' /etc/uce/settings.cfg 2>/dev/null || true)
+worker_count="${worker_count:-4}"
+worker_pids=""
+for _ in {1..48}; do
+	output=$(scripts/uce-cli "/$test_name/parent.uce")
+	worker_pids+="${output##*:}"$'\n'
+done
+unique_workers=$(printf '%s' "$worker_pids" | sed '/^$/d' | sort -u | wc -l)
+if (( unique_workers > worker_count )); then
+	echo "worker pool recycled during 48 requests: $unique_workers PIDs for $worker_count workers" >&2
+	exit 1
+fi
+
 echo "dependency invalidation passed"