ARM processors DMIPS ARM processors DMIPS 0

Core	Architecture	bits	DMIPS/MHz
ARM11	v7-A	32	1.25
Cortex-A7	v7-A	32	1.9
Cortex-A8	v7-A	32	2.0
Cortex-A9	v7-A	32	2.0
Cortex-A15	v7-A	32	4.0
Cortex-A17	v7-A	32	4.0
Cortex-A32	v8-A	32	2.3
Cortex-A35	v8-A	32/64	2.5
Cortex-A53	v8-A	32/64	2.3
Cortex-A55	v8-A	32/64	2.3
Cortex-A57	v8-A	32/64	4.6
Cortex-A72	v8-A	32/64	5.4
Cortex-A73	v8-A	32/64	7.0
Cortex-A75	v8-A	32/64	7.0
Cortex-A76	v8-A	32/64	7.0

Core	Architecture	bits	DMIPS/MHz
M0	v6-M	32	0.9~0.99
M0+	v6-M	32	1.08
M3	v6-M	32	1.25~1.5
M4	v6-M	32	1.25~1.52
M7	v-M	32	2.14/2.55/3.23

For example:
i.MX8MEK
A72@1.6GHz = 4.7*1600= 7520 DMIPS
A53@1.2GHz = 2.3*1200 = 2760 DMIPS