[Bug 105106] [CI] igt at perf_pmu@busy-start-vcs0 - Failed assertion: (double)(val) <= (1.0 + (tolerance)) * (double)(ts[1] - ts[0]) && (double)(val) >= (1.0 - (tolerance)) * (double)(ts[1] - ts[0]) (perf_pmu:1787) CRITICAL: 'val' != 'ts[1] - ts[0]' (455000000.000000 not

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105106

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
What's telling about this is the

(perf_pmu:1787) DEBUG: slept=506588707 perf=506593737
(perf_pmu:1787) CRITICAL: 'val' != 'ts[1] - ts[0]' (455000000.000000 not within
+5.000000%/-5.000000% tolerance of 506593737.000000)

so it's not just a timing issue of how long we slept as we had hoped.

Plan B was to wait for the spin batch to start.

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