Scheduling Model in LLVM

The blog post provides an introduction to the LLVM scheduling model, its significance in performance tuning, and details on specifying scheduling information for individual instructions. The write-up delves into the modeling of microarchitecture, types of processor buffer layouts, and their implications.

• LLVM scheduling model impacts instruction scheduling and target-specific optimizations.
• Multiple processors can share the same LLVM scheduling model.
• Scheduling information is characterized by operand reads and writes.
• Effective scheduling aims to minimize latency and maximize throughput.
• Different processor resource buffers have distinct roles in scheduling.