Why does the ARM A15 processor have so many DVFS levels ?

For eg. the A15 on the Samsung Exynos 5422 has around 19 DVFS levels which varies frequencies from 200MHz to 2GHz.
Why does the ARM A15 processor have so many DVFS levels ?

For eg. the A15 on the Samsung Exynos 5422 has around 19 DVFS levels which varies frequencies from 200MHz to 2GHz.
Disabling dvfs

I did this on my rooted Note3 device: echo 'off' > /sys/devices/platform/mali.0/dvfs I see the value is always 0. But when I run an application and query the clock, it goes from 24 to 480 and keeps dipping...
Disabling dvfs

I did this on my rooted Note3 device: echo 'off' > /sys/devices/platform/mali.0/dvfs I see the value is always 0. But when I run an application and query the clock, it goes from 24 to 480 and keeps dipping...
DVFS implementation in C

Hello, Is there any API to implement DVFS in a Linux C environment? I would like to use DVFS to implement an energy-efficient application for a research project. Best regards