Cortex-X4 cores are the most powerful ARM has created to date, Substitutes for Armv9-based Cortex-X3, Cortex-X4 embraces the new architecture Armv9.2 with all the improvements and novelties that we have reviewed in this extensive article and that will be accompanied by the new 5th generation GPUs.
One of the improvements of this architecture is increased scalability that allows more cores to be added in combinations of different types. In addition, the DSU-120 microarchitectureheiress of the DSU-110 and that allows you to create clusters of different cores working at the same time sharing L3 cache.
In general, especially if we talk about SoCs for smartphones, it is usual to see high-performance 1-core combinations (Cortex-X4 in this new generation), along with 7 more cores that would be divided between the different architectures ARM Cortex-A720 and ARM Cortex-A520). However, the design of the power system and the cores themselves, in addition to the DSU-120, allows the new ARM SoCs to add combinations never seen before, which include, for example, SoCs with 10 Cortex-X4 cores together to four Cortex-A720 cores for example, to have a 14 core SoC.
What’s more, they could design processors with 14 high-performance Cortex-X4 cores with much higher performance than conventional big.LITTLE SoCs. Naturally, this type of solution will not be aimed at smartphones, and its creation (if any SoC manufacturer is committed to it), will be aimed at devices such as laptops with more powerful power and cooling systems.
The DSU-120 is capable of handling up to 32 MB L3 cache and its design allows the consumption of each core, and even parts of the associated L3, to be adjusted independently in order to achieve a processor that increases its performance proportionally to the number of cores that are integrated.
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