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• #6004 S_x96x_S addikt

  Új Válasz 2021-12-02 04:52:05 #6004

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  S_x96x_S

  addikt

  A Linux 5.17 -ben hegesztik a ZEN procik NUMA-s teljesítményét.
  ( javulás várható egyes estekben )
  Persze ez főleg a Szervereknél ( EPYC ) lesz hasznos.

  ----------------------
  "New Linux Scheduler Patches Can Improve AMD Zen Performance For Some Workloads"
  https://www.phoronix.com/scan.php?page=news_item&px=Linux-Sched-NUMA-Imbalance-Zen

  "A set of two patches under review on the kernel mailing list for tweaking some kernel scheduler behavior can provide noticeable performance benefits to those using AMD EPYC and Ryzen processors on various workloads.

  Last year the Linux kernel scheduler code was adapted to allow a floating imbalance between NUMA nodes until 25% of the CPU cores are occupied while higher than that the balancing behaves as normal. Prior to that an imbalance between NUMA nodes was only allowed when the destination node was effectively idle."

  ". With benchmarks carried out by Gorman, on an AMD Zen 3 system when running the Stream OpenMP-based memory benchmark he saw improvements between 180% and 268%. For the Coremark CPU synthetic benchmark he saw the harmonic mean and maximum performance go up by 15% while the minimum score improved by nearly 10% too. With SPECjbb Java workloads he also generally saw better performance too."
  

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