Krait (CPU)
From Infogalactic: the planetary knowledge core
| Produced | 2012 |
|---|---|
| Designed by | Qualcomm |
| Common manufacturer(s) | |
| Max. CPU clock rate | 1 GHz to 2.7 GHz |
| Instruction set | ARMv7-A, Thumb-2 |
| Cores | 2 or 4 |
| L1 cache | 16 KiB/16 KiB |
| L2 cache | 1 MiB or 2 MiB |
| Predecessor | Scorpion |
| Successor | Kryo |
Krait is an ARM-based central processing unit included in Qualcomm Snapdragon S4 and Snapdragon 400/600/800/801/805 (Krait 200, Krait 300, Krait 400 and Krait 450) System on chips. It was introduced in 2012 as a successor to the Scorpion CPU and although it has architectural similarities, Krait is not a Cortex-A15 core, but it was designed in-house.[1]
Contents
Overview
- 11 stage integer pipeline with 3-way decode and 4-way out-of-order speculative issue superscalar execution
- Pipelined VFPv4[2][under discussion] and 128-bit wide NEON (SIMD)
- 7 execution ports
- 4 KB + 4 KB direct mapped L0 cache
- 16 KB + 16 KB 4-way set associative L1 cache
- 1 MB 8-way set associative (dual-core) or 2 MB (quad-core) L2 cache
- Dual or quad-core configurations
- Performance (DMIPS/MHz):
- Krait 200: 3.3 (28 nm LP)
- Krait 300: 3.39[3] (28 nm LP)
- Krait 400: 3.39 (28 nm HPm)
- Krait 450: 3.51 (28 nm HPm)
