On Sun, 2020-05-31 at 11:59 -0700, Srinivas Pandruvada wrote: > On Sun, 2020-05-31 at 11:06 -0700, Doug Smythies wrote: > > Hi Srinivas, > > > > Thanks you for your quick reply. > > > > On 2020.05.31 09:54 Srinivas Pandruvada wrote > > > On Sun, 2020-05-31 at 09:39 -0700, Doug Smythies wrote: > > > > Event begins at 17.456 seconds elapsed time. > > > > Previous event was about 107 milliseconds ago. > > > > > > > > Old min ; new min ; freq GHz; load % ; duration mS > > > > 27 ; 28 ; 4.60 ; 68.17 ; 10.226 > > > > 28 ; 26 ; 4.53 ; 57.47 ; 10.005 > > > > > > Seems you hit power/thermal limit > > > > No. > > > > I am nowhere near any power limit at all. > > I have meticulously configured and tested the thermal management of > > this computer. > > I never ever hit a thermal limit and have TDP set such that the > > processor > > temperature never exceeds about 75 degrees centigrade. > > > > There should never be throttling involved in these experiments. > > I can achieve throttling when compiling the kernel and with > > torture test mode on the mprime test (other CPU stressors, > > including my own, are not as good at generating heat as > > mprime). > > > > This system can run indefinitely at 99.9 watts processor package > > power. > > Example (turbostat, steady state, CPU freq throttled to 4.04 GHz): > > > > doug@s18:~$ sudo ~/turbostat --Summary --quiet --show > > Busy%,Bzy_MHz,PkgTmp,PkgWatt,GFXWatt,IRQ --interval 12 > > Busy% Bzy_MHz IRQ PkgTmp PkgWatt GFXWatt > > 100.21 4045 72231 66 99.93 0.00 > > 100.21 4043 72239 65 99.92 0.00 > > > > > Is this some Lenovo system? > > > > No. The web page version of my original e-mail has > > a link to the test computer hardware profile. > > > > The motherboard is ASUS PRIME Z390-P. > > > > OK, this seems a desktop system. > > > > If you disable HWP you don't see that? > > > > Correct. > > > > > What is the value of > > > cat /sys/bus/pci/devices/0000\:00\:04.0/tcc_offset_degree_celsius > > > > ? "No such file or directory" > > > > > cat /sys/class/powercap/intel-rapl-mmio/intel-rapl- > > > mmio:0/constraint_0_power_limit_uw > You may not have > CONFIG_INT340X_THERMAL=y > > What is > #rdmsr 0x1a2 > > Try changing energy_perf_bias and see if it helps here. > Also if MSR 0x1FC bit 19 is 0, change to 1.
Thanks, Srinivas > Thanks, > Srinivas > > > > ? "No such file or directory" > > > > > You may want to run > > > Try running dptfxtract once. > > > > No, I am not going to. > > > > I am not running thermald. Eventually I will, as a backup > > in case of cooling failure, so as not to hit the processor limit > > shutdown. I just haven't done it yet. > > > > > Then try to get again > > > > > > cat /sys/bus/pci/devices/0000\:00\:04.0/tcc_offset_degree_celsius > > > cat /sys/class/powercap/intel-rapl-mmio/intel-rapl- > > > mmio:0/constraint_0_power_limit_uw > > > > > > > > > Thanks, > > > Srinivas
