3 ms·

How read-intensive is the kernel's use of RCU? (2022)

• underdeserver 3y ago
  [flagged]
  • cout 3y ago
    Why is this even possible?
  • RinTohsaka 3y ago
    Same here
  • deleted 3y ago
    [deleted]
• dist1ll 3y ago
  Great use of bpftrace! eBPF-based tracing is really useful for understanding multithreaded performance in the kernel. E.g. if you're running into kernel-level lock contention, the preemption time won't show up in the perf report (except for the few moments of optimistic spin locking). I was trying to understand a bottleneck related to concurrent page faulting, and being able to just hook into the relevant event is nice.
• travisgriggs 3y ago
  2022
  • dang 3y ago
    Added above. Thanks!
• deleted 3y ago
  [deleted]