IBM Unveils World's First Dual-Architecture Mainframe Processor with Nanosecond ARM-Z Switching

IBM announced at the HotChips conference the launch of the world's first dual-architecture mainframe processor. The processor natively supports both ARM and IBM's proprietary Z instruction set, and can switch between architectures within nanoseconds. This mechanism is built on the open-source KVM hypervisor, allowing enterprises to run Arm64 Linux virtual machines and Z virtual machines in parallel. When the hypervisor schedules virtual machines to physical cores, the cores automatically switch modes with near-zero performance overhead.

The processor is manufactured on a 2nm process, featuring an 11-core CPU architecture with a frequency of up to 5.7GHz. IBM mainframes have long served as core infrastructure for banks, insurers, and other enterprises, relying on IBM's proprietary Z-series processors. With the development of the ARM+Linux ecosystem, IBM has introduced this processor to adapt to evolving market conditions.