Timerlat auto-analysis:

  - Timerlat is reporting thread interference time without thread noise
    events occurrence. It was caused because the thread interference variable
    was not reset after the analysis of a timerlat activation that did not
    hit the threshold.

  - The IRQ handler delay is estimated from the delta of the IRQ latency
    reported by timerlat, and the timestamp from IRQ handler start event.
    If the delta is near-zero, the drift from the external clock and the
    trace event and/or the overhead can cause the value to be negative.
    If the value is negative, print a zero-delay.

  - IRQ handlers happening after the timerlat thread event but before
    the stop tracing were being reported as IRQ that happened before the
    *current* IRQ occurrence. Ignore Previous IRQ noise in this condition
    because they are valid only for the *next* timerlat activation.

Timerlat user-space:

  - Timerlat is stopping all user-space thread if a CPU becomes
    offline. Do not stop the entire tool if a CPU is/become offline,
    but only the thread of the unavailable CPU. Stop the tool only,
    if all threads leave because the CPUs become/are offline.

man-pages:

  - Fix command line example in timerlat hist man page.
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