A while back, there was this post http://lists.lm-sensors.org/pipermail/lm-sensors/2010-July/029109.html which sumed up the issue (for me, the alternating-fan sound pattern is annoying). I attach a patch to make this possible, by giving a comma- separated list of temperature sensors in FCTEMPS. I've tested it by forcing the affinity of a high-load process to different cores, while monitoring the /sys/class/hwmon/hwmonN/device/pwmM contents to make sure it does not change. (Not subscribed, please CC.) -- Chusslove Illich (Часлав Илић)
Index: doc/fancontrol.txt
===================================================================
--- doc/fancontrol.txt (revision 6037)
+++ doc/fancontrol.txt (working copy)
@@ -37,6 +37,10 @@
Maps pwm outputs to temperature sensors so fancontrol knows which
temperature sensors should be used for calculation of new values for
the corresponding pwm outputs.
+ Several temperature sensors may be mapped to single pwm output
+ as a comma-separated list, in which case the maximum of all readings
+ is taken as the referent temperature. This is useful for a CPU fan
+ on a multi-core CPU with separate temperature sensors per core.
FCFANS
FCFANS records the association between a pwm and a fan.
Index: prog/pwm/fancontrol
===================================================================
--- prog/pwm/fancontrol (revision 6037)
+++ prog/pwm/fancontrol (working copy)
@@ -224,12 +224,14 @@
let fcvcount=0
while (( $fcvcount < ${#AFCTEMP[@]} )) # go through all temp inputs
do
- tsen=${AFCTEMP[$fcvcount]}
- if [ ! -r $tsen ]
- then
- echo "Error: file $tsen doesn't exist" >&2
- outdated=1
- fi
+ for tsen in $(echo ${AFCTEMP[$fcvcount]} | tr ',' ' ')
+ do
+ if [ ! -r $tsen ]
+ then
+ echo "Error: file $tsen doesn't exist" >&2
+ outdated=1
+ fi
+ done
let fcvcount=$fcvcount+1
done
@@ -391,12 +393,20 @@
minpwm=${AFCMINPWM[$fcvcount]}
maxpwm=${AFCMAXPWM[$fcvcount]}
- read tval < ${tsens}
- if [ $? -ne 0 ]
- then
- echo "Error reading temperature from $DIR/$tsens"
- restorefans 1
- fi
+ tval=0
+ for tsen in $(echo ${tsens} | tr ',' ' ')
+ do
+ read tval1 < ${tsen}
+ if [ $? -ne 0 ]
+ then
+ echo "Error reading temperature from $DIR/$tsen"
+ restorefans 1
+ fi
+ if [ $tval -lt $tval1 ]
+ then
+ tval=$tval1
+ fi
+ done
read pwmpval < ${pwmo}
if [ $? -ne 0 ]
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