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→Interrupt latency
[ 483.380456] imx-uart 21f0000.serial: Rx FIFO overrun
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When dynamic processor's voltage/frequency scaling is enabled, Linux kernel performs a lot of transactions between different [[[[FAQs_(Axel)#Q:_How_can_I_change_the_CPU_clock_frequency.3F|OPPs]]. Two approaches are available to implement such transactions:
* PMIC-based: in this case an external Power Management Integrated Circuit (PMIC) is used to change the processor's voltages
* internal LDOs-based: in this case processor's internal linear regulators are used to change such voltages.
