{
    select: {
        total_rendered_frames: [
            "INSPECT:core/ui/scenic:root/scenic/FrameScheduler/Frame\\ Stats/frame_history/total:rendered_frames",
        ],
        total_dropped_frames: [
            "INSPECT:core/ui/scenic:root/scenic/FrameScheduler/Frame\\ Stats/frame_history/total:dropped_frames",
        ],
        total_delayed_frames: [
            "INSPECT:core/ui/scenic:root/scenic/FrameScheduler/Frame\\ Stats/frame_history/total:delayed_rendered_frames",
        ],
        sample_array: [
            "INSPECT:core/ui/scenic:root/scenic/FrameScheduler/Frame\\ Stats/frame_history/minutes_ago/*:total_frames",
        ],
    },
    eval: {
        measurement_count: "Count(sample_array)",

        // We measure over 10 minutes.
        measurement_period_seconds: "60 * measurement_count",

        // Calculate average frames per second.
        // Our target is 60FPS, so we figure out how many frames fit in
        // the last measurement period, subtract the number of frames we
        // failed to fit, and then see how many we could have rendered per second.
        frames_per_second: "(60 * measurement_period_seconds - total_dropped_frames - total_delayed_frames) // measurement_period_seconds",
        delay_ratio: "total_delayed_frames / total_rendered_frames",
    },
    act: {
        dropped_frames: {
            type: "Warning",
            trigger: "total_dropped_frames > 0",
            print: "We dropped some frames in the past 10 minutes",
            file_bug: "Scenic",
        },
        delayed_frames: {
            type: "Warning",
            trigger: "delay_ratio > .05",
            print: "We delayed over 5% of frames in the past 10 minutes",
            file_bug: "Scenic",
        },
        frames_per_second: {
            type: "Gauge",
            value: "frames_per_second",
        },
        delayed_frames_percentage: {
            type: "Gauge",
            value: "delay_ratio",
            format: "percentage",
        },
    },
    test: {
        all_ok: {
            no: [
                "dropped_frames",
                "delayed_frames",
            ],
            yes: [],
            values: {
                total_rendered_frames: 1,
                total_dropped_frames: 0,
                total_delayed_frames: 0,
            },
        },
        any_dropped_frames: {
            no: [
                "delayed_frames",
            ],
            yes: [
                "dropped_frames",
            ],
            values: {
                total_rendered_frames: 1,
                total_dropped_frames: 1,
                total_delayed_frames: 0,
            },
        },
        five_percent_delay: {
            no: [],
            yes: [
                "dropped_frames",
                "delayed_frames",
            ],
            values: {
                total_rendered_frames: 100,
                total_dropped_frames: 1,
                total_delayed_frames: 6,
            },
        },
    },
}