Add upstart script to collect temperature statistics.

This is used only in selected platforms, and installed
by the temp-metrics package in the private overlay for
those platforms.

BUG=chrome-os-partner:11631
TEST=manually using about:histograms
Signed-off-by: Luigi Semenzato <semenzato@chromium.org>

Change-Id: I89dffed6aa34d683ff78a360988fdfb84c2dc641
Reviewed-on: https://gerrit.chromium.org/gerrit/28311
Tested-by: Luigi Semenzato <semenzato@chromium.org>
Reviewed-by: Richard Barnette <jrbarnette@chromium.org>
Commit-Ready: Luigi Semenzato <semenzato@chromium.org>

1 files changed, 33 insertions, 0 deletions

diff --git a/util/temp_metrics.conf b/util/temp_metrics.conf
new file mode 100644
index 0000000000..be8138aea3
--- /dev/null
+++ b/util/temp_metrics.conf
@@ -0,0 +1,33 @@
+# Copyright (c) 2012 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     "Temporary, quick-hack metrics collection daemon"
+author          "chromium-os-dev@chromium.org"
+
+# This is for quickly adding UMA stats that we may need for
+# short-term experiments, when we don't have the time to add
+# stuff to metrics_daemon.  That's where it should go in the
+# long term.
+start on started system-services
+stop on stopping system-services
+respawn
+
+script
+  TEMP_OFFSET=273  # difference between K (reported by EC) and C (used in UMA)
+  while true; do
+    sleep 30
+    ectool temps all | while read line; do
+      index=$(printf "%02d" "${line%%:*}")
+      tempk="${line##* }"
+      tempc=$(($tempk - $TEMP_OFFSET))
+      # ignore values below freezing
+      if [ $tempc -lt 0 ]; then
+        tempc=0
+      fi
+      # Use a linear histogram with 1 C buckets starting at 0.
+      N_SLOTS=180
+      metrics_client -e Platform.Temperature.Sensor$index $tempc $N_SLOTS
+    done
+  done
+end script