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Google Updates Patches For AutoFDO+Propeller Optimized Linux Kernel
Google engineers have been working on support for the Linux kernel to leverage AutoFDO feedback directed optimizations and Propeller optimizations when compiling the Linux kernel with LLVM/Clang
It operates by relinking the binary based on an additional round of runtime profiles, enabling precise optimizations that are not possible at compile time. Our empirical data demonstrates significant performance improvements with AutoFDO and Propeller, up to 10% on microbenchmarks and up to 5% on large warehouse-scale benchmarks. The selected microbenchmarks included Neper, a network subsystem benchmark, and UnixBench which is a comprehensive suite for assessing various kernel operations.
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