Qualcomm Krait is an ARM-based central processing unit included in the Snapdragon S4 and earlier models of Snapdragon 400/600/800 series SoCs. 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it has architectural similarities, Krait is not a Cortex-A15 core, but it was designed in-house.[1] In 2015, Krait was superseded by the 64-bit Kryo architecture, first introduced in Snapdragon 820 SoC.
| General information | |
|---|---|
| Launched | 2012 |
| Designed by | Qualcomm |
| Common manufacturer |
|
| Performance | |
| Max. CPU clock rate | 1 GHz to 2.7 GHz |
| Cache | |
| L1 cache | 16 KiB and 16 KiB |
| L2 cache | 1 MiB or 2 MiB |
| Architecture and classification | |
| Instruction set | ARMv7-A, Thumb-2 |
| Physical specifications | |
| Cores |
|
| History | |
| Predecessor | Scorpion |
| Successor | Kryo |
Overview
edit- 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 (dual-core) or 2 MB (quad-core) 8-way set-associative 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)
See also
editReferences
edit- ^ Brian Klug; Anand Lal Shimpi (October 7, 2011). "Qualcomm's New Snapdragon S4: MSM8960 & Krait Architecture Explored". Anandtech. Retrieved 2013-07-28.
- ^ Brian Klug; Anand Lal Shimpi (February 21, 2012). "Qualcomm Snapdragon S4 (Krait) Performance Preview - 1.5 GHz MSM8960 MDP and Adreno 225 Benchmarks". Anandtech. Retrieved 2013-07-28.
- ^ Linley Gwennap (December 18, 2012). "Krait 300 Bumps Up Performance". Linley on Mobile. The Linley Group. Retrieved 2013-07-28.