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cpu_delta_us

khive_runtime::resource

Function cpu_delta_us 

Source 
pub fn cpu_delta_us(
    start: Option<ProcessResourceUsage>,
    end: Option<ProcessResourceUsage>,
) -> Option<i64>
Expand description

CPU time consumed strictly between two ProcessResourceUsage snapshots, in microseconds.

cpu_us on a snapshot is cumulative process CPU time since process start, not CPU consumed by any one phase, so per-phase attribution needs the delta between an entry and exit snapshot. The result is floored at zero so a spurious (should-never-happen) decrease in cumulative CPU between two reads never surfaces as a negative delta.