power: Add temp_logger init script
This script is current added to many boards in
chromeos-bsp-private package but since it is
useful generally, it makes more sense to migrate
this to power_manager ebuild to add it to all boards.
BUG=b:174742099
TEST=shellcheck, manual test in eve, lazor, morphius
Cq-Depend: chrome-internal:3437979, chrome-internal:3442787
Cq-Depend: chrome-internal:3443887, chrome-internal:3438640
Cq-Depend: chrome-internal:3437978, chromium:2573444
Cq-Depend: chromium:2581739, chromium:2581559
Change-Id: I6d1b61fd6b96d712d3840308d24891fbfbf0c762
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/2569746
Tested-by: Puthikorn Voravootivat <puthik@chromium.org>
Commit-Queue: Puthikorn Voravootivat <puthik@chromium.org>
Reviewed-by: Todd Broch <tbroch@chromium.org>
diff --git a/power_manager/init/upstart/temp_logger.conf b/power_manager/init/upstart/temp_logger.conf
new file mode 100644
index 0000000..af69acd
--- /dev/null
+++ b/power_manager/init/upstart/temp_logger.conf
@@ -0,0 +1,32 @@
+# Copyright 2020 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+description "Log temperature from internal sensors every minute"
+author "chromium-os-dev@chromium.org"
+
+start on started system-services
+stop on stopping system-services
+respawn
+respawn limit 3 10 # if the job respawns 3 times in 10 seconds, stop trying.
+
+# Allow us to be killed as we are not critical to the system.
+oom score -100
+
+# Let the process crash if it grows too much. "as" for "address space".
+# Currently it uses about 6.5 MB (by checking /proc/$PID/status).
+limit as 50000000 unlimited
+
+# Run the script in minijail minimalistic-mountns profile.
+# -b /dev/log for logger
+# -b /sys for /sys/class/thermal and /sys/class/powercap
+exec minijail0 \
+ -u power \
+ --profile=minimalistic-mountns \
+ --uts \
+ -e \
+ -l \
+ -p \
+ -b /dev/log \
+ -b /sys \
+ -- /usr/share/cros/init/temp_logger.sh
diff --git a/power_manager/tools/temp_logger.sh b/power_manager/tools/temp_logger.sh
new file mode 100644
index 0000000..c0bc548
--- /dev/null
+++ b/power_manager/tools/temp_logger.sh
@@ -0,0 +1,67 @@
+#!/bin/sh
+
+# Copyright 2020 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Logger wrapper.
+log_message() {
+ logger -t temp_logger "$@"
+}
+
+# Output xx:yyC where xx is temp sensor id and yy is the actual temperature.
+get_sensor_temp() {
+ local zone="$1"
+ local tempc=0
+ local index=""
+ local tempstr=""
+
+ if [ ! -r "${zone}" ]; then
+ return
+ fi
+ tempc=$(($(cat "${zone}") / 1000))
+ index=$(echo "${zone}" | grep -o -E '[0-9]+')
+ tempstr=$(printf "%02d:%dC" "${index}" "${tempc}")
+ echo "${tempstr}"
+}
+
+# Glob all temp sensors sysfs and output temperatures with get_sensor_temp().
+get_all_sensor_temps() {
+ local logstr=""
+ local tempstr=""
+
+ for zone in /sys/class/thermal/thermal_zone*/temp; do
+ tempstr=$(get_sensor_temp "${zone}")
+ logstr="${logstr} ${tempstr}"
+ done
+
+ echo "${logstr}"
+}
+
+# Read PL1 from powercap sysfs (Intel only), output nothing otherwise.
+get_pl1() {
+ local pl1="/sys/class/powercap/intel-rapl:0/constraint_0_power_limit_uw"
+ local pl1uw=0
+ local pl1str=""
+
+ if [ ! -r "${pl1}" ]; then
+ return
+ fi
+ pl1uw=$(cat "${pl1}")
+ pl1str=$(printf "PL1:%.3fW" "$((pl1uw))e-6")
+ echo "${pl1str}"
+}
+
+main() {
+ if [ $# -ne 0 ]; then
+ echo "Usage: $0" >&2
+ exit 1
+ fi
+
+ while true; do
+ log_message "$(get_all_sensor_temps)" "$(get_pl1)"
+ sleep 60
+ done
+}
+
+main "$@"
