On Tue, Jan 18, 2022 at 6:23 PM 孙世龙 sunshilong <sunshilong369@xxxxxxxxx> wrote: > > Hi, list > I am using Linux 5.4.78 with PREEMPT_RT patch. > Hardware name: UNO-2372G-J021AE. > > It's strange that the frequency of the CPU is not constant(i.e. > not fixed at a specific frequency) if I both disable CONFIG_CPU_FREQ > and CONFIG_CPU_IDLE > whereas > the frequency of the CPU is constant if I only disable CONFIG_CPU_FREQ > (leave CONFIG_CPU_IDLE enabled). > > Could somebody please shed some light on this matter? just a WAG, but lower power draw has been hugely important for years, nobody would sacrifice that for "simplicity", such a feature would be unused. I could imagine enterprise SMM bios disallowing such operation. On dozens of processors over time, TSC has been marked unstable by the kernel, Id suppose that signals a certain distrust of some clocks. _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
