[dalehamel]

Stack

0. LuaJIT unwinding — omnibus snapshot (tarantool + openresty, amd64/arm64) #50: production LuaJIT snapshot (f3e2115a)
1. Hack Days base: current main, LuaJIT, and Ruby JIT follow-up #59: green Hack Days base: current main + Ruby-JIT ruby: Handle Ruby JIT PC with JIT frame type open-telemetry/opentelemetry-ebpf-profiler#1102 (0a00112e)
2. [I/O profiles foundation] Integrate upstream ProbeContext API #58: upstream ProbeContext / custom-probes API (a4f279c1)
3. [I/O profiles 1/4] Add synchronous I/O latency probes #53: synchronous VFS/TCP and block queue latency (9c56b6ec)
4. [I/O profiles 2/4] Add async correlation and io_uring latency #54 (this PR): async correlation and io_uring latency (f87ae55a)
5. [I/O profiles 3/4] Add block lifecycle and TCP connect latency #55: block lifecycle and TCP connect latency (1630cf2d)
6. [I/O profiles 4/4] Add TCP sequence latency profiles #56: TCP send-to-ACK and receive-consumption latency (d046cc66)

Ancestry: #50 ← #59 ← #58 ← #53 ← #54 ← #55 ← #56.

This stack is for the Shopify fork only. No branch or PR is being submitted to upstream OpenTelemetry.

Summary

• Add a shared bounded asynchronous correlator keyed by (origin, correlation ID).
• Preserve initiating frames, PID/TID, process/resource attribution, custom labels, and APM IDs until actual completion.
• Add configurable capacity and TTL plus start, completion, duplicate, orphan, eviction, filtered, and pending metrics.
• Add io_uring SQE-to-CQE latency profiles with:
  • request-pointer correlation and (ctx,user_data) fallback
  • runtime tracepoint format parsing for Linux layout drift
  • full submitter unwind with kernel fallback for deferred/SQPOLL execution
  • 32/64-bit result handling, cancellation/error labels, completion flags, and multishot retention
• Add a raw io_uring NOP integration workload.

Base update

• Current head: f87ae55a; base: [I/O profiles 1/4] Add synchronous I/O latency probes #53 at 9c56b6ec.
• LuaJIT unwinding — omnibus snapshot (tarantool + openresty, amd64/arm64) #50 remains production-pinned; current main and Ruby-JIT ruby: Handle Ruby JIT PC with JIT frame type open-telemetry/opentelemetry-ebpf-profiler#1102 live in green base Hack Days base: current main, LuaJIT, and Ruby JIT follow-up #59.
• The updated stack was propagated with ordinary merge commits, not rebases. This PR's binary diff is identical to 780aef41..fedb3372.

Validation

• Targeted Go tests across tracer, reporter, controller, collector, probes, metrics, support, and process manager.
• go test ./... -run '^$' compile sweep.
• golangci-lint: zero issues; vanity-import and eBPF format checks pass.
• Reproducible amd64/arm64 eBPF builds with clang 17.
• Privileged arm64 TestAllTracers and io_uring submission-to-CQE integration tests pass on the restacked cumulative tip.

Current CI status

• Base Hack Days base: current main, LuaJIT, and Ruby JIT follow-up #59 is fully green: 43 passed, 1 skipped, 0 failed, including amd64/arm64 coredumps and Linux 5.10–7.1 integration jobs.
• The former Ruby-YJIT mismatch is fixed in this branch's ancestry. Full CI for f87ae55a is green: 36 passed, 1 skipped, 0 failed.

Draft / follow-ups

• Automated Linux 5.10+ validation is complete; human review and representative SQPOLL/io_uring workload validation remain.