add fan_rpm_loop script
The script allows running different rpm set-points and verifying whether
the coefficients behave as intended.
Change-Id: I7bc2e5328299ee14349550edb119279c143f4a1b
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/tools/fan_rpm_loop_test.sh b/tools/fan_rpm_loop_test.sh
new file mode 100755
index 0000000..cbebe24
--- /dev/null
+++ b/tools/fan_rpm_loop_test.sh
@@ -0,0 +1,88 @@
+#!/bin/bash
+
+# shim system-level operations to allow for unit testing
+MkDir() { mkdir "$@"; }
+Mv() { mv "$@"; }
+Sleep() { sleep "$@"; }
+SystemCtl() { systemctl "$@"; }
+
+# Store commanded rpm as thermal set-point.
+#
+# Arg:
+# rpm - rpm set-point.
+CommandRpm() {
+ printf '%d\n' "$1" > /etc/thermal.d/set-point
+}
+
+# Sweep or step rpm over range.
+#
+# Args:
+# start_rpm: start RPM value
+# stop_rpm: stop RPM value
+# num_steps: number of control steps; i.e., not including start.
+# dwell: dwell time at each point, in seconds
+RunRpmSteps() {
+ local -i start_rpm=$1
+ local -i stop_rpm=$2
+ local -i num_steps=$3
+ local -i dwell=$4
+
+ # Rounding offset when dividing range into num_steps
+ local -i h=$((num_steps / 2))
+
+ # To avoid asymmetrical division behavior for negative numbers,
+ # rearrange negative slope to positive slope running backward;
+ # I.e., to run using loop variable p: {num_steps downto 0}.
+ local -i rpm0=$((start_rpm))
+ local -i range=$((stop_rpm - start_rpm))
+ local -i s=1
+ if ((range < 0)); then
+ ((rpm0 = stop_rpm))
+ ((range = -range))
+ ((s = -1))
+ fi
+
+ echo "Running RPM from ${start_rpm} to ${stop_rpm} in ${num_steps} steps"
+ CommandRpm "${start_rpm}"
+ SystemCtl start swampd.service
+ Sleep 60
+
+ local i
+ for ((i = 0; i <= num_steps; ++i)); do
+ local -i p=$((s < 0 ? num_steps - i : i))
+ local -i rpm=$((rpm0 + (range * p + h) / num_steps))
+ echo "Setting RPM to ${rpm} and sleep ${dwell} seconds"
+ CommandRpm "${rpm}"
+ Sleep "${dwell}"
+ done
+
+ SystemCtl stop swampd.service
+ Mv /tmp/swampd.log ~/"${start_rpm}_${stop_rpm}_${num_steps}_${dwell}.csv"
+ echo "Done!!"
+}
+
+# Sweep and step fans from min to max and max to min.
+#
+# Args:
+# min_rpm: min RPM for the platform
+# max_rpm: max RPM for the platform
+main() {
+ local min_rpm=$1
+ local max_rpm=$2
+
+ if ((min_rpm < 1 || max_rpm < min_rpm)); then
+ echo "Invalid arguments. Usage: fan_rpm_loop_test.sh <MIN_RPM> <MAX_RPM>"
+ return 1
+ fi
+
+ MkDir -p /etc/thermal.d/
+ SystemCtl stop swampd.service
+
+ RunRpmSteps "${min_rpm}" "${max_rpm}" 10 30
+ RunRpmSteps "${max_rpm}" "${min_rpm}" 10 30
+ RunRpmSteps "${min_rpm}" "${max_rpm}" 1 30
+ RunRpmSteps "${max_rpm}" "${min_rpm}" 1 30
+}
+
+return 0 2>/dev/null
+main "$@"