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Guide on optimizing Linux kernel with BOLT
The LLVM Project is a collection of modular and reusable compiler and toolchain technologies. - llvm/llvm-project
In our experiments, BOLT boosted database TPS by 2 percent when applied to the kernel compiled with the highest level optimizations, including PGO and LTO. BOLT runs on a linked binary and reorders the code while combining frequently executed blocks of instructions in a manner best suited for the hardware. By improving the code layout, BOLT can boost the kernel's performance by up to 5% by reducing instruction cache misses and branch mispredictions.
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