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New Linux Patches Enhance Single-Threaded Performance on Many-Core CPUs

13 days ago
https://www.phoronix.com/news/Better-ST-Perf-Many-Core-CPUs
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  • #CPU
  • #Linux
  • #Performance
  • New Linux patches aim to improve single-threaded performance on many-core CPUs.
  • Optimization focuses on the 'rss_stat' structure in the Linux kernel, which tracks memory usage statistics.
  • The patch series addresses performance issues with per-CPU memory allocation in high-core-count systems.
  • Special handling for single-threaded applications reduces overhead by using local counters for most updates and atomic counters for remote updates.
  • Performance improvements include 6-15% in synthetic benchmarks and 1.5% in realistic benchmarks like kernbench.
  • The patches could benefit high-core-count systems like AMD EPYC and Threadripper.
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