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common, osd, tools: Add histograms to performance counters #12829
This change adds new performance counter type: histogram.
Currently it does measure latency + request size (in bytes) of an op similarly to
Since new data could break existing tools and the amount of data dumped is rather large,
Current configuration of histograms is hard-coded and should cover all common cases.
Signed-off-by: Bartłomiej Święcki firstname.lastname@example.org
OKed by @sageweil1 to merge