Krait (processor)

Krait
General information
Launched	2012
Designed by	Qualcomm
Common manufacturer	Qualcomm;
Cache
L1 cache	16 KiB/16 KiB
L2 cache	1 MiB or 2 MiB
Architecture and classification
Instruction set	ARMv7
Physical specifications
Cores	2 or 4;

Krait is an ARM-based central processing unit included in Qualcomm Snapdragon S4 and Snapdragon 400/600/800 (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 has architectural similarities to ARM Cortex-A15.

Overview^[1]

11 stage integer pipeline with 3-way decode and 4-way out-of-order speculative issue superscalar execution
Pipelined VFPv4^[2] 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)

^ 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.