On Fri, Jul 25, 2014 at 05:45:30PM +0200, Jean Delvare wrote: > Hi Eric, > > Please leave the list Cc'd. > > On Fri, 25 Jul 2014 15:55:06 +0200, Éric Le Bras wrote: > > 2014-07-25 9:31 GMT+02:00 Jean Delvare <jdelvare@xxxxxxx>: > > > On Wed, 23 Jul 2014 11:08:14 +0200, Éric Le Bras wrote: > > > > label temp1 "Sys temp" > > > > label temp2 "unknown" > > > > label temp3 "unknown" > > > > > > If you don't know, just don't put labels, "unknown" doesn't add much > > > value. One of these is most certainly the CPU temperature, I'm > > > surprised it's not obvious. What does the output of "sensors > > > -c /dev/null" say? > > > > temp2 sensor is labeled as CPU diode, so it is somewhat related to CPU > > temp. However there is another measure reported by "coretemp" circuit, > > which reports the exact temperature displayed by the BIOS. So what is > > exactly temp2? > > Coretemp is a digital reading straight from the CPU. Reacts very fast, > good accuracy at high temperatures, but very poor accuracy at low > temperatures. The readings from the W83627DHG chip, OTOH, are analog > temperature measurements using diodes or thermistors. So both coretemp > and temp2 are the CPU temperature, just measured differently. > > > Temp3 has a weird behaviour. It lowers when the CPU load increases. I > > enclosed a graph generated with sensord. The curve for temp3 has an > > "inversed" profile, compared to other temps. > > That does not mean it's wrong. You should draw the fan speed together > with the temperatures. Higher CPU temperature will typically result in > a faster spinning fan, which in turn can lower the temperature of > other parts of the system. This is even more likely for a system > without a CPU fan where the CPU cooling is achieved by the case fan. > Is it possible that temp3 is the temperature reported by the CPU through PECI and the chip reports the raw PECI value for some reason ? Guenter _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
