TAPSET::IOSCHEDULER(3stap)

📦
version 5.6 · 9 versions
, in centos-stream 10, centos-stream 9, fedora 43, fedora 44

✨ TAPSET::IOSCHEDULER ✨

okay bestie, welcome to tapset::ioscheduler from the SystemTap Tapset Reference (3stap section, iykyk) 💅

🌸 NAME 🌸

tapset::ioscheduler — it's the systemtap ioscheduler tapset, no cap 🎀

🦋 DESCRIPTION 🦋

so basically this whole fam of probe points exists to probe IO scheduler activities. that's the vibe. every single one of them, obsessed. 💖

Here's the full roster, no skips, no cuts, all 13 of them:

  • ioscheduler.elv_next_request — fires the moment a request gets retrieved from the request queue 👑

See probe::ioscheduler.elv_next_request(3stap) for details.

  • ioscheduler.elv_next_request.return — fires when a request retrieval issues a return signal 🫶

See probe::ioscheduler.elv_next_request.return(3stap) for details.

  • ioscheduler.elv_completed_request — fires when a request is completed ✨

See probe::ioscheduler.elv_completed_request(3stap) for details.

  • ioscheduler.elv_add_request.kp — a kprobe based probe that indicates a request was added to the request queue 🔥

See probe::ioscheduler.elv_add_request.kp(3stap) for details.

  • ioscheduler.elv_add_request.tp — a tracepoint based probe that indicates a request is added to the request queue. 💜

See probe::ioscheduler.elv_add_request.tp(3stap) for details.

  • ioscheduler.elv_add_request — the probe that indicates a request is added to the request queue. 🍓

See probe::ioscheduler.elv_add_request(3stap) for details.

  • ioscheduler_trace.elv_completed_request — fires when a request is 😭

See probe::ioscheduler_trace.elv_completed_request(3stap) for details.

  • ioscheduler_trace.elv_issue_request — fires when a request is 😭

See probe::ioscheduler_trace.elv_issue_request(3stap) for details.

  • ioscheduler_trace.elv_requeue_request — fires when a request is 😭

See probe::ioscheduler_trace.elv_requeue_request(3stap) for details.

  • ioscheduler_trace.elv_abort_request — fires when a request is aborted. 💀

See probe::ioscheduler_trace.elv_abort_request(3stap) for details.

  • ioscheduler_trace.plug — fires when a request queue is plugged; 🌈

See probe::ioscheduler_trace.plug(3stap) for details.

  • ioscheduler_trace.unplug_io — fires when a request queue is unplugged; 🌈

See probe::ioscheduler_trace.unplug_io(3stap) for details.

  • ioscheduler_trace.unplug_timer — fires when unplug timer associated 🧚

See probe::ioscheduler_trace.unplug_timer(3stap) for details.

not me noticing a few of these one-liners literally just stop mid-sentence in the original — "fires when a request is" and then nothing 😭 i am NOT inventing the rest, bestie, i'm a good source-faithful girlie. the probe:: pages are where the actual tea lives, so go read those for the details. 💅

💫 SEE ALSO 💫

the whole friend group, in order, plus the two big siblings at the end:

that's the whole page, main character energy from start to finish, periodt. 🎀

mwah 💖 this was the SystemTap Tapset Reference, dated September 2026, and you were reading TAPSET::IOSCHEDULER(3stap) — go slay some IO scheduler probes, bestie 🫶

📦 where this page comes from