/sys/kernel/debug/xfs/sdf/timestats//blocked::buflock :
count: 3199237
                       since mount        recent
duration of events
  min:                           54 ns
  max:                           24 ms
  total:                         33 s
  mean:                          10 us      30 us
  stddev:                       158 us     258 us
time between events
  min:                            1 ns
  max:                          999 ms
  mean:                          10 us      35 us
  stddev:                       637 us     331 us
/sys/kernel/debug/xfs/sdf/timestats//blocked::buflock.json :
{
        "count":    3199237,
        "duration_ns": {
                "min":    54,
                "max":    24384317,
                "total":  33733652136,
                "mean":   10544,
                "stddev": 158776
        },
        "duration_ewma_ns": {
                "mean":   30048,
                "stddev": 258211
        },
        "frequency_ns": {
                "min":    1,
                "max":    999155096,
                "mean":   10029,
                "stddev": 637916
        },
        "frequency_ewma_ns": {
                "mean":   35374,
                "stddev": 331794
        }
}