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CONFIG_RISCV_ISA_V_PREEMPTIVE: Run kernel-mode Vector with kernel preemption

General informations

The Linux kernel configuration item CONFIG_RISCV_ISA_V_PREEMPTIVE:

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Usually, in-kernel SIMD routines are run with preemption disabled. Functions which envoke long running SIMD thus must yield core's vector unit to prevent blocking other tasks for too long.

This config allows kernel to run SIMD without explicitly disable preemption. Enabling this config will result in higher memory consumption due to the allocation of per-task's kernel Vector context.



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