Sleeping fixture writers can expose only some updated domains to the second sample, producing false zero watts in CI. Run collection under synctest, wait for its sampling timer, update counters synchronously and join completion before assertions or cleanup.
Retain availability, routing and wraparound assertions, add exact delta checks, and apply the same ordering to AMD fallback and RAPL preference fixtures. Production collection and sampling semantics are unchanged.
Change-source: pulse-maintainer
(cherry picked from commit 2e3ff7494c)
pulse-triage[bot]
9eafd31f62