On Arm LX2, SME's 4x peak advantage over SVE shrinks to 2.2x in tensor contractions and 1.1x in a full SPECFEM3D stiffness operator; layout and SIMD changes recover about 1.6x at high order.
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Beyond Fast Contractions: Attenuation and Recovery of Matrix-Engine Speedups in High-Order Finite Elements
On Arm LX2, SME's 4x peak advantage over SVE shrinks to 2.2x in tensor contractions and 1.1x in a full SPECFEM3D stiffness operator; layout and SIMD changes recover about 1.6x at high order.