On Fri, 2016-11-04 at 21:44 +0100, Pavel Machek wrote: > Hi! > > > > > > > > > Let me try v4.9-rc2... that works ok (cpus at the high frequency > > > during the kernel build). Unfortunately that sends my cpus to 99C > > > temperature range (and eventually forces emergency shutdown). > > > > This we have to debug. Do you see same line like > > " > > /sys/devices/system/cpu/cpu0/cpufreq/bios_limit:1000000 > > " > > If not we need > > to find out why. > > I'd prefer mails over bugzilla for now... > > 4.9-rc2 has bios_limit: > > pavel@duo:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/bios_limit > 1833000 > > and it has thermal zones: > > /sys/devices/virtual/thermal/thermal_zone0/trip_point_0_temp 127000 > /sys/devices/virtual/thermal/thermal_zone0/trip_point_0_type critical > /sys/devices/virtual/thermal/thermal_zone1/trip_point_0_temp 97000 > /sys/devices/virtual/thermal/thermal_zone1/trip_point_0_type critical > /sys/devices/virtual/thermal/thermal_zone1/trip_point_1_temp 92500 > /sys/devices/virtual/thermal/thermal_zone1/trip_point_1_type passive > It will not act if there is no binding information. Do you have more files in this folder? grep -r . * in /sys/class/thermal will be helpful. > ..so it should slow down CPU at 92C. > > So lets push the temperature up a bit... > > sudo watch cat /proc/acpi/ibm/thermal > /sys/devices/system/cpu/cpu0/cpufreq/bios_limit > /sys/devices/virtual/thermal/thermal_zone1/temp /sys/devices/system/ > cpu/cpu0/cpufreq/cpuinfo_cur_freq > > temperatures: 98 49 -128 85 28 -128 28 -128 49 58 -128 -128 -128 > -128 -128 -128 > 1833000 > 95000 > 1833000 > > Hmm. bios_limit does not seem to change, even when the temperature is > clearly above the trip point. (It is also interestng that acpi/ibm > reports bigger temperatures than > /sys/devices/virtual/thermal/thermal_zone1/temp . I have seen 103C > there.) Probably they are showing package and core temperature or have a different sampling interval. Try enabling thermald service in Debian. it has access to more knobs to control thermals. Thanks, Srinivas ------------------------------------------------------------------------------ Developer Access Program for Intel Xeon Phi Processors Access to Intel Xeon Phi processor-based developer platforms. With one year of Intel Parallel Studio XE. Training and support from Colfax. Order your platform today. http://sdm.link/xeonphi _______________________________________________ ibm-acpi-devel mailing list ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel
