ARM Cortex-X4
{{Short description|High-performance CPU core design}}
{{Infobox CPU
|name=ARM Cortex-X4
|fast-unit=
|image_size=
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|caption=
|produced-start=2023
|produced-end=
|soldby=
|designfirm=ARM Ltd.
|manuf1=
|cpuid=
|code=
|slowest=
|fastest=
|image=
|slow-unit=
|instructions=
|address-width=40-bit
|virtual-width=
|l1cache={{Nowrap|128 KiB}}
{{Small|({{Nowrap|64 KiB}} I-cache with parity,
{{Nowrap|64 KiB}} D-cache) per core}}
|l2cache={{Nowrap|512–2048 KiB}} {{Small|per core}}
|l3cache={{Nowrap|512 KiB – 32 MiB}} {{Small|(optional)}}
|l4cache=
|llcache=
|application=
|size-from=
|size-to=
|arch=ARMv9.2-A
|microarch=ARM Cortex-X4
|data-width=
|extensions=
|transistors=
|numcores=1–10 (per cluster)
|gpu=
|co-processor=
|pack1=
|sock1=
|core1=
|pcode1="Hunter ELP"
|model1=
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|variant=ARM Cortex-A720
|predecessor=ARM Cortex-X3
|successor=ARM Cortex-X925
}}
The ARM Cortex-X4 is a high-performance CPU core from Arm, released in 2023{{Cite web |date=2023-06-02 |title=Arm Total Compute Solution 2023 targets premium smartphones |url=https://www.embedded.com/arm-launches-total-compute-solution-2023-for-premium-smartphones/ |access-date=2024-01-17 |website=embedded.com |language=en-US}} as part of Arm's "total compute solution".{{Cite web |date=2023-05-29 |title=TCS23: The complete platform for consumer computing - Arm Community |url=https://community.arm.com/arm-community-blogs/b/announcements/posts/third-generation-total-compute-solutions |access-date=2023-09-16 |website=community.arm.com |language=en }} It serves as the successor of ARM Cortex-X3.{{Cite web |date=2023-05-28 |title=Arm introduces the Cortex-X4, its newest flagship performance core |url=https://fuse.wikichip.org/news/7531/arm-introduces-the-cortex-x4-its-newest-flagship-performance-core/ |access-date=2023-05-30 |website=WikiChip Fuse |language=en-US}}
X-series CPU cores generally focus on high performance, and can be grouped with other ARM cores, such as ARM Cortex-A720 or/and ARM Cortex-A520 in a System-on-Chip (SoC).{{Cite web |date=2023-05-29 |title=Arm Cortex-X4 advances frontiers of CPU performance - Arm Community |url=https://community.arm.com/arm-community-blogs/b/announcements/posts/cortex-x4-cpu-performance |access-date=2023-09-16 |website=community.arm.com |language=en }}{{Cite web |title=Arm Unveils 2023 Mobile CPU Core Designs: Cortex-X4, A720, and A520 - the Armv9.2 Family |url=https://www.anandtech.com/show/18871/arm-unveils-armv92-mobile-architecture-cortex-x4-a720-and-a520-64bit-exclusive |access-date=2023-05-30 |website=www.anandtech.com}}
Architecture changes in comparison with ARM Cortex-X3
The processor implements the following changes:
- ARMv9.2
- micro-op (MOP) cache removed (previously 1.5k entries)
- Decode width: 10
- Rename / Dispatch width: 10 (increased from 8)
- Reorder buffer (ROB): 384 entries (increased from 320)
- Execution ports: 21 (increased from 15)
- Pipeline length: 10 (increased from 9)
- Up to 2 MiB of private L2 cache (increased from 1 MiB)
- DSU-120
- Up to 14 cores (up from 12 cores)
- Up to 32 MiB of shared L3 cache (increased from 16 MiB)
Performance claims:
- 15% peak performance improvement over the Cortex-X3 in smartphones
- 13% IPC uplift over the Cortex-X3, when based on the same process, clock speed,
:and L3 cache (but 2 MiB L2 vs 1 MiB L2) setup (also known as ISO-process).
Architecture comparison
:;"Prime" core
| class="wikitable sortable" cellpadding="3px" style="border: 1px solid black; border-spacing: 0px; width: 100%; text-align:center; |
| uArch |
|---|
| Code name
|Hercules |Hera |Matterhorn-ELP |Makalu-ELP |Hunter-ELP |Blackhawk |Travis |
| Architecture
| colspan="2" |ARMv8.2 | colspan="2" |ARMv9 | colspan="3" |ARMv9.2 |
| Peak clock speed
| colspan="3" |~3.0 GHz |~3.3 GHz |~3.4 GHz |~3.8 GHz |~4.2 GHz |
| Decode width
|4 | colspan="2" |5 |6 |10 | |
| Dispatch
|6/cycle | colspan="3" |8/cycle | colspan="2" |10/cycle | |
| Max in-flight
|2x 160 |2x 224 |2x 288 |2x 320 |2x 384 |2x 768 | |
| L0 (Mops entries)
|1536 | | |
| L1-I + L1-D
|32+32 KiB | colspan="2" |64+64 KiB | colspan="2" |64+64 KiB |64+64 KiB | |
| L2
|128–512 KiB | colspan="3" |0.25–1 MiB |0.5–2 MiB |2–3 MiB | |
| L3
| colspan="2" |0–16 MiB | colspan="2" |0–32 MiB | |
Usage
- Google • Tensor G4{{Cite web |date=2024-06-01 |title=Latest Pixel 9 leak gives us a look at the Tensor G4 specs and benchmarks |url=https://www.androidauthority.com/tensor-g4-benchmarks-leak-3448100/ |access-date=2024-06-01 |website=Android Authority |language=en}}
- MediaTek • Dimensity 9300/9300+{{Cite web |date=2023-05-29 |title=MediaTek says its Snapdragon 8 Gen 3 rival will be a beast (Updated) |url=https://www.androidauthority.com/mediatek-dimensity-chipset-arm-3330100/ |access-date=2023-09-16 |website=Android Authority |language=en}}
- Qualcomm • Snapdragon 8 Gen 3 (2023){{Cite web |date=2023-05-29 |title=Qualcomm Snapdragon Tech Summit Live Blog: Compute Spotlight |url=https://www.anandtech.com/show/21109/qualcomm-snapdragon-tech-summit-live-blog-compute-spotlight/ |access-date=2023-09-16 |website=Android Authority |language=en}}
See also
- ARM Cortex-A520, related high efficient microarchitecture
- ARM Cortex-A720, related efficient sustained performance microarchitecture
- Comparison of ARMv8-A cores