GCC Link Time Optimization and the Linux Kernel
summary
GCC 4.7 introduced Link Time Optimization (LTO), which enables whole-program aggressive optimizations. The talk covers applying LTO to the large Linux kernel, detailing necessary changes to GCC, the kernel, and binutils, describing experiences and the current status of the LTO-enabled kernel, and highlighting remaining problems in GCC's LTO implementation.
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chapters (8)
- 0:00GCC LTO and Linux Kernel
- 3:27How GCC LTO works
- 9:00Parallel LTO compilation
- 15:55LTO memory consumption
- 24:01Debugging LTO symbol issues
- 31:36LTO performance trade-offs
- 37:24GCC LTO future optimizations
- 44:48Q&A
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