Krait (CPU)

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Krait
Produced 2012
Designed by Qualcomm
Common manufacturer(s)
Instruction set ARMv7
Cores 2 or 4
L1 cache 16 KiB/16 KiB
L2 cache 1 MiB or 2 MiB

Krait is an ARM-based central processing unit included in Qualcomm Snapdragon S4 and Snapdragon 400/600/800 (Krait 200, Krait 300 and Krait 400) 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][edit]

  • 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)

See also[edit]

References[edit]

  1. ^ Brian Klug; Anand Lal Shimpi (October 7, 2011). "Qualcomm's New Snapdragon S4: MSM8960 & Krait Architecture Explored". Anandtech. Retrieved 2013-07-28. 
  2. ^ 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. 
  3. ^ Linley Gwennap (December 18, 2012). "Krait 300 Bumps Up Performance". Linley on Mobile. The Linley Group. Retrieved 2013-07-28. 

External links[edit]