Fine tuning of temp_metrics thermal loop

Fine tuned temperature thresholds and added watermark concept to the
thermal loop.

BUG=chrome-os-partner:9193
TEST=Vary CPU and GPU load on the system.  The fan speed and CPU/GPU
limits should change as the skin temperature responds to changes in the
load.
BRANCH=link

Change-Id: I43739097e699bc4e724e395c6e830c7c694704cc
Signed-off-by: Sameer Nanda <snanda@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/34454
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
(cherry picked from commit c98e1079318f90dc0d5b8238da0d50d46a530ead)
Reviewed-on: https://gerrit.chromium.org/gerrit/34546

1 files changed, 33 insertions, 18 deletions

diff --git a/util/temp_metrics.conf b/util/temp_metrics.conf
index adca6850de..fc35e08ef5 100644
--- a/util/temp_metrics.conf
+++ b/util/temp_metrics.conf
@@ -146,13 +146,18 @@ script
     logger -t temp_metrics "$*"
   }
 
-  TEMP_THRESHOLD_1=40
+  TEMP_THRESHOLD_1=38
+  TEMP_THRESHOLD_1_WM=40
   TEMP_THRESHOLD_2=45
+  TEMP_THRESHOLD_2_WM=47
   TEMP_THRESHOLD_3=50
+  TEMP_THRESHOLD_3_WM=50
 
-  TEMP_THRESHOLD_1_MIN_STEP=0
-  TEMP_THRESHOLD_1_MAX_STEP=4
-  TEMP_THRESHOLD_2_MIN_STEP=5
+  TEMP_THRESHOLD_0_MIN_STEP=0
+  TEMP_THRESHOLD_0_MAX_STEP=0
+  TEMP_THRESHOLD_1_MIN_STEP=1
+  TEMP_THRESHOLD_1_MAX_STEP=5
+  TEMP_THRESHOLD_2_MIN_STEP=6
   TEMP_THRESHOLD_2_MAX_STEP=9
   TEMP_THRESHOLD_3_MIN_STEP=10
   TEMP_THRESHOLD_3_MAX_STEP=13
@@ -167,24 +172,28 @@ script
 
     skin_temp=$1
     if [ $skin_temp -gt $TEMP_THRESHOLD_3 ]; then
-      temp_threshold=$TEMP_THRESHOLD_3
+      temp_watermark=$TEMP_THRESHOLD_3_WM
       min_step=$TEMP_THRESHOLD_3_MIN_STEP
       max_step=$TEMP_THRESHOLD_3_MAX_STEP
     elif [ $skin_temp -gt $TEMP_THRESHOLD_2 ]; then
-      temp_threshold=$TEMP_THRESHOLD_2
+      temp_watermark=$TEMP_THRESHOLD_2_WM
       min_step=$TEMP_THRESHOLD_2_MIN_STEP
       max_step=$TEMP_THRESHOLD_2_MAX_STEP
-    else
-      temp_threshold=$TEMP_THRESHOLD_1
+    elif [ $skin_temp -gt $TEMP_THRESHOLD_1 ]; then
+      temp_watermark=$TEMP_THRESHOLD_1_WM
       min_step=$TEMP_THRESHOLD_1_MIN_STEP
       max_step=$TEMP_THRESHOLD_1_MAX_STEP
+    else
+      temp_watermark=0
+      min_step=$TEMP_THRESHOLD_0_MIN_STEP
+      max_step=$TEMP_THRESHOLD_0_MAX_STEP
     fi
 
-    if [ $skin_temp -gt $temp_threshold ]; then
+    if [ $skin_temp -gt $temp_watermark ]; then
       if [ $current_step -ne $max_step ]; then
         new_step=$(($current_step + 1))
       fi
-    elif [ $skin_temp -lt $temp_threshold ]; then
+    elif [ $skin_temp -lt $temp_watermark ]; then
       if [ $current_step -gt $min_step ]; then
         new_step=$(($current_step - 1))
       fi
@@ -225,6 +234,7 @@ script
     temp_low3=105
     temp_low4=105
     temp_low5=105
+    temp_low6=105
   }
 
   last_rpm=10
@@ -233,6 +243,7 @@ script
   temp_low3=105
   temp_low4=105
   temp_low5=105
+  temp_low6=105
 
   fan_loop() {
     skin_temp=$1
@@ -241,22 +252,26 @@ script
       rpm=9300
       fan_reset_thresholds
       temp_low1=46
-    elif [ $skin_temp -gt 45 ] || [ $skin_temp -gt $temp_low2 ]; then
-      rpm=7800
+    elif [ $skin_temp -gt 44 ] || [ $skin_temp -gt $temp_low2 ]; then
+      rpm=8000
       fan_reset_thresholds
       temp_low2=43
     elif [ $skin_temp -gt 42 ] || [ $skin_temp -gt $temp_low3 ]; then
-      rpm=6000
+      rpm=7000
+      fan_reset_thresholds
+      temp_low3=41
+    elif [ $skin_temp -gt 40 ] || [ $skin_temp -gt $temp_low4 ]; then
+      rpm=5500
       fan_reset_thresholds
-      temp_low3=39
-    elif [ $skin_temp -gt 38 ] || [ $skin_temp -gt $temp_low4 ]; then
+      temp_low4=39
+    elif [ $skin_temp -gt 38 ] || [ $skin_temp -gt $temp_low5 ]; then
       rpm=4000
       fan_reset_thresholds
-      temp_low4=34
-    elif [ $skin_temp -gt 33 ] || [ $skin_temp -gt $temp_low5 ]; then
+      temp_low5=34
+    elif [ $skin_temp -gt 33 ] || [ $skin_temp -gt $temp_low6 ]; then
       rpm=3000
       fan_reset_thresholds
-      temp_low5=30
+      temp_low6=30
     else
       rpm=0
       fan_reset_thresholds