Low latency values

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Hi,

I'm seeing really low latency values, to the extent that they don't seem realistic.

Snippet from the latest perf dump for this OSD:

"op_r_latency": { "avgcount": 184229,
          "sum": 178.077710000},

Long run avg = 178.07771/184229 = 0.00097 ms? Is it correct that latency values have milliseconds as units?
If so, this number seems too small.

Any help would be appreciated.

Thanks,
Dan
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