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Adjust fan speed gently while in the optimal range when temperature is drifting to minimise overshoot in either direction.

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ckolivas 2012-01-25 15:48:28 +11:00
parent 9549dacf99
commit 312724cea1
1 changed files with 12 additions and 0 deletions
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12
adl.c
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@ -869,6 +869,18 @@ static void fan_autotune(int gpu, int temp, int fanpercent, bool *fan_optimal)
if (opt_debug)
applog(LOG_DEBUG, "Temperature %d degrees below target, decreasing fanspeed", opt_hysteresis);
newpercent = ga->targetfan - 1;
} else {
/* We're in the optimal range, make minor adjustments if the
* temp is still drifting */
if (fanpercent > bot && temp < ga->lasttemp && temp < ga->targettemp) {
if (opt_debug)
applog(LOG_DEBUG, "Temperature dropping while in target range, decreasing fanspeed");
newpercent = ga->targetfan - 1;
} else if (fanpercent < top && temp > ga->lasttemp && temp > ga->targettemp - opt_hysteresis) {
if (opt_debug)
applog(LOG_DEBUG, "Temperature rising while in target range, increasing fanspeed");
newpercent = ga->targetfan + 1;
}
}
if (newpercent > iMax)