~/talk

resctrl filesystem

on YouTube 43m
Talkat Linux Plumbers Conference 2023 · 2023-11-13..11-15· [linux-and-operating-systems]

speaker

name:Peter Newman
links:none on file

resources

video:https://youtu.be/j6SB_-CeFHo
slides:none on file

summary

Resctrl is being refactored so the filesystem and core APIs support non-x86 QoS and monitoring like MPAM on ARM and CBQRI on RISC‑V; patches split locking, move plumbing into the FS, and add a driver layer so platform drivers can register resources. Google runs resctrl at scale and reports oddities: differing topology semantics (L3 vs memory controller), scarce PMU counters (example machine has 112 ARM IDs but few monitors), and unmount/cleanup bugs. Series on the list is near consensus; next steps are driver posts and schema additions to enumerate resource types.

AI-written summary · about

chapters (9)

  1. 0:00Introduction and background
  2. 3:12Challenges with multi-architecture support
  3. 8:57Resource naming and schema design
  4. 15:19Patch series status and next steps
  5. 21:44Monitoring and control ID space issues
  6. 27:04Cleanup and unmount behavior
  7. 31:07ABI stability and future directions
  8. 38:57Hardware-specific behavior and documentation
  9. 42:37Closing remarks and Q&A

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