Hi,

Slow performance might be due to thermal throttling,

Can you please check prochot# signal? It should be high(voltage equal to power rail to which it's pulled up to)

In Linux, you can use powertop program to monitor CPU frequency, CPU C-states.

Under some load, CPU will utilise max frequency. Try running some benchmark tool and check max frequency CPU is able to reach.

I'm not sure why you want to access SVID bus now. This is handled by CPU based on its instantaneous operating frequency.

That's for Vcc_core voltage control. Higher frequency will need higher voltage on Vcc_Core and vice versa.

Also can you measure voltage on this rail in loaded condition.

Also provide coreboot log.

Dhanyawad,

Naresh G Solanki

On Fri, 22 Feb, 2019, 8:35 PM , <dponamorev@gmail.com> wrote:

On the motherboard developed by our company (intel atom denverton 3538), there is a low performance of the processor and memory. When trying to monitor the exchange of the SVID bus lines with the oscilloscope (SVID_CLK, SVID_DATA and SVID_ALERT), no activity was noticed. Circuit design is correct (passed Intel review).
Could this be the reason for the slow speed of the processor and memory? Do I need to activate this technology in coreboot or FSP? Is there any way to check the operation of the sVID controller from Linux?
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