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ARM Cortex-X2

Summary

The ARM Cortex-X2 is a central processing unit implementing the ARMv9-A 64-bit instruction set designed by ARM Holdings' Austin design centre as part of ARM's Cortex-X Custom (CXC) program.[2] It forms part of Arm's Total Compute Solutions 2021 (TCS21) along with Arm's Cortex-A710, Cortex-A510, Mali-G710 and CoreLink CI-700/NI-700.[3]

ARM Cortex-X2
General information
Launched2021
Designed byARM Ltd.
Performance
Max. CPU clock rate2.85 GHz[1]  to 3.00 GHz[1] 
Cache
L1 cache128 KiB (64 KiB I-cache with parity, 64 KiB D-cache) per core
L2 cache512–1024 KiB per core
L3 cache512 KiB – 8 MiB (optional)
Architecture and classification
MicroarchitectureARM Cortex-X2
Instruction setARMv9.0-A
Products, models, variants
Product code name(s)
  • Matterhorn ELP
Variant(s)
History
Predecessor(s)ARM Cortex-X1
Successor(s)ARM Cortex-X3

Architecture changes in comparison with ARM Cortex-X1 edit

The processor implements the following changes:[4][5][6]

  • 10 cycle pipeline down from 11, created by reducing the dispatch stage from 2 cycles to 1
  • Reorder buffer (ROB) increased by 30% from 224 entries to 288
  • dTLB increased by 20% from 40 entries to 48
  • SVE2 SIMD support
  • Bfloat16 data type support
  • Support for Aarch32 removed
  • DSU-110
    • Up to 12 cores (up from 8 cores)
    • Up to 16M L3 cache (up from 8 MB)
  • CoreLink CI-700/NI-700
    • Up to 32MB SLC
  • ARMv9.0

Performance claims:

  • Comparing the Cortex-X2 to the Cortex-X1 with the same process, clock speed, and 4MB of L3 cache (also known as ISO-process):
    • 16% greater integer performance / IPC
    • 100% greater ML performance
  • 30% peak performance improvement over the Cortex-X1 in smartphones (3.3 GHz, 1MB L2, 8MB L3)
  • 40% faster than an Intel Core i5-1135G7 at 15W (3.5 GHz, 1MB L2, 16MB L3)

Usage edit

See also edit

References edit

  1. ^ a b Dr. Ian Cutress (December 14, 2021). "The Snapdragon 8 Gen 1 Performance Preview: Sizing Up Cortex-X2". anandtech.com. AnandTech. Retrieved March 3, 2022.
  2. ^ Ltd, Arm. "Cortex-X Custom CPU program". Arm | The Architecture for the Digital World. Retrieved 2021-12-02.
  3. ^ "Arm Total Compute solutions powering decade of compute - Architectures and Processors blog - Arm Community blogs - Arm Community". community.arm.com. 2021-05-25. Retrieved 2023-09-16.
  4. ^ "Arm Launches Its New Flagship Performance Armv9 Core: Cortex-X2". WikiChip Fuse. 2021-05-25. Retrieved 2021-12-03.
  5. ^ Frumusanu, Andrei. "Arm Announces Mobile Armv9 CPU Microarchitectures: Cortex-X2, Cortex-A710 & Cortex-A510". www.anandtech.com. Retrieved 2021-12-03.
  6. ^ "Documentation – Arm Developer". developer.arm.com. Archived from the original on 2021-12-03. Retrieved 2021-12-03.
  7. ^ "Summit Dimensity9000| Latest 5G Snapdragon Processor | Qualcomm". i.mediatek.com. 17 November 2021. Retrieved 2021-12-02.
  8. ^ "Snapdragon 7+ Gen 2 Mobile Platform". Qualcomm. Retrieved 17 March 2023.
  9. ^ "Qualcomm Snapdragon 8 Gen 1 Mobile Platform | Latest 5G Snapdragon Processor | Qualcomm". www.qualcomm.com. 17 November 2021. Retrieved 2021-12-02.
  10. ^ "Exynos 2200 | Processor".