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There are two sets of three probes here. The first set of probes reports the maximum contiguous frames dropped during compositor animations. This gives us some idea of the volatility of the compositor framerate. The second set of probes reports the frame throughput, which is the number of actual frames composited divided by the expected number of frames (based on the vsync interval and wall-clock time) during compositor animations. The ratio is scaled up to 1000, so values of 1000 should indicate a "perfect score". The probes use linear bucketing with a max value of 1500 in case we get abnormal cases where we composite more frames than expected. Within each set, there is one probe for compositor animations triggered by the chrome process, one for compositor animations triggered by a content process, and one for compositor animations driven by APZ. MozReview-Commit-ID: LFJsEPnQhja --HG-- extra : rebase_source : d943b4612c2a84b0d4b85c5eafb0d0025ffba80f |
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