scripts: Add throttler details to collect script

Add details of the KSM throttler to the output of the data collection
script. Look for both Kata and Clear Containers KSM throttler details.

Fixes #739.

Signed-off-by: James O. D. Hunt <james.o.hunt@intel.com>

data/kata-collect-data.sh.in

@@ -206,6 +206,7 @@ show_log_details()
 	show_runtime_log_details
 	show_proxy_log_details
 	show_shim_log_details
+	show_throttler_log_details
 
 	separator
 }
@@ -256,6 +257,13 @@ show_shim_log_details()
 	find_system_journal_problems "shim" "@PROJECT_TYPE@-shim" ""
 }
 
+show_throttler_log_details()
+{
+	subheading "Throttler logs"
+
+	find_system_journal_problems "throttler" "" "@PROJECT_TYPE@-ksm-throttler"
+}
+
 show_package_versions()
 {
 	heading "Packages"
@@ -275,6 +283,7 @@ show_package_versions()
 		pattern+="|${project}-proxy"
 		pattern+="|${project}-runtime"
 		pattern+="|${project}-shim"
+		pattern+="|${project}-ksm-throttler"
 		pattern+="|${project}-containers-image"
 	done
 
@@ -543,6 +552,44 @@ release_device()
 	losetup -d "$device"
 }
 
+show_throttler_details()
+{
+	heading "KSM throttler"
+
+	subheading "version"
+
+	local throttlers
+	local throttler
+
+	throttlers=$(find /usr/libexec /usr/lib* -type f |\
+		grep -v trigger |\
+		egrep "(cc|kata)-ksm-throttler" |\
+		sort -u)
+
+	echo "$throttlers" | while read throttler
+	do
+		local cmd
+		cmd="$throttler --version"
+		run_cmd_and_show_quoted_output "$cmd"
+	done
+
+	subheading "systemd service"
+
+	local unit
+
+	# Note: "vc-throttler" is the old CC service, replaced by
+	# "kata-vc-throttler".
+	for unit in \
+		"cc-ksm-throttler" \
+		"kata-ksm-throttler" \
+		"kata-vc-throttler" \
+		"vc-throttler"
+	do
+		systemctl status "${unit}" >/dev/null 2>&1 && \
+			run_cmd_and_show_quoted_output "systemctl show ${unit}"
+	done
+}
+
 # Retrieve details of the image containing
 # the rootfs used to boot the virtual machine.
 show_image_details()
@@ -642,6 +689,7 @@ main()
 	show_meta
 	show_runtime
 	show_runtime_configs
+	show_throttler_details
 	show_image_details
 	show_initrd_details
 	show_log_details