On Tue, 2020-06-30 at 17:48 +0200, Vitaly Zaitsev via devel wrote: > On 30.06.2020 15:25, Ben Cotton wrote: > > Better thermal management and peak performance on Intel CPUs by > > including thermald in the default install. > > Good, but thermald is absolutely useless without configs. Configs can be > extracted from DPTF ACPI tables only with *proprietary* dptfextract utility.
But, this is not true in general and we can expect further improvements in the near future. It will not help in all situations, but there are situations where users will see improved performance. One example of this is for example an improved peak-performance on pre-Kabylake systems (I am looking into finding further examples). So, it is true that thermald will throw around quite a few warnings at startup (it seems to warn about anything it probes and cannot find). But that does not imply that it is always useless. It does for example use information from the PPCC tables even if it does not have any configuration. These power limits are exported by the kernel in /sys/bus/pci/devices/*/power_limits/. Also, some reverse engineering work has been happening. This means that it is possible to improve thermald to get at least some of the benefits of a DPTF based configuration without needing dptfxtract. This is currently still work in progress, however, upstream is planning to merge this work once it has been cleaned up sufficiently. i.e. at this point we can fully expect to get improved thermal management based on the DPTF tables without dptfxtract. > Also Fedora cannot ship extracted by dptfextract configs due to their > legal status. The idea to ship those configurations separately has been dropped from the proposal. Benjamin
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