Hi
We're having some performance issues with our system using the Intel Atom C2758 processor. The CPU core clocks are reduced after a reboot and is permanently stuck at this low speed until I do a power cycle. The "cpupower" tool reports that the frequency is 2200 MHz after a power cycle and 1200 MHz after a reboot.
I have dumped the MSR registers, and the only register that stood out is the is the IA32_PERF_STS register. This register is set to "0xa6000000164a" and "0xa60000000c1d" after a reboot. I have tried setting the IA32_PERF_CTL register (with acpi-cpufreq disabled), but this doesn't seem to have any effect.
The mainboard is using Coreboot v4.9 as BIOS and is based on the Mohonpeak board. I have tested both Debian 9 and Red hat 7, and both have the same issue.
Appreciate if anyone can help or provide any input to on what I can do.
Best Regards,
Andreas Myhre Software Engineer Galleon Embedded Computing Email: amyhre@galleonec.com