Kryo
CPU and microarchitecture designed by Qualcomm implementing the ARMv8-A 64-bit instruction set
Qualcomm Kryo is a series of custom or semi-custom ARM-based CPUs included in the Snapdragon line of SoCs.
These CPUs implement the ARM 64-bit instruction set and serve as the successor to the previous 32-bit Krait CPUs. It was first introduced in the Snapdragon 820 (2015). In 2017 Qualcomm released the Snapdragon 636 and Snapdragon 660, the first mid-range Kryo SoCs. In 2018 the first entry-level SoC with Kryo architecture, the Snapdragon 632, was released.
Kryo (original)
First announced in September 2015 and used in the Snapdragon 820 SoC. The original Kryo cores can be used in both parts of the big.LITTLE configuration, where two dual-core clusters (in the case of Snapdragon 820 and 821) run at different clock frequency, similar to how both Cortex-A53 clusters work in the Snapdragon 615.
The Kryo in the 820/821 is an in-house custom ARMv8.0-A (AArch64/AArch32) design and not based on an ARM Cortex design.
820: 2x Kryo Performance @ 2.15 GHz + 2x Kryo Efficiency @ 1.59 GHz
821: 2x Kryo Performance @ 2.34 GHz + 2x Kryo Efficiency @ 2.19 GHz
32 KB L1i + 32 KB L1d cache
1 MB L2 cache (Performance cluster) and 512 KB L2 cache for (Efficiency cluster)
Samsung 14 nm LPP Process
Performance core+L2 die size: 2.79mm2
Kryo 200 Series
The Kryo 200 Series CPUs is not a derivative of the original Kryo microarchitecture, but rather is a semi-custom design licensed under ARM’s Built on ARM Cortex Technology (BoC) license. The Kryo 200 Series CPUs is derivative of the ARM's Cortex-A73 for the Performance/Gold cluster and Cortex-A53 for the Efficiency/Silver cluster in a big.LITTLE arrangement.
Kryo 280
The Kryo 280 CPU was announced along with the Snapdragon 835 Mobile Platform in November 2016.
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