cms-sw
need for automatic detection of numerical underflows in histograms
In data/MC comparisons for tracking we were hit by the limits of TH1F numerical precision.
Histograms with more than around 1e7 entries in a bin will stop accumulation in that bin (because within numerical precision x + 1. == x).
It may be useful to have a generic feature in MonitorElement or DQMAnalyzers to e.g. once per lumi (or more often) to check if the histograms have any bins with entries that would underflow a fill (with some configurable weight; default of 1).
The same could be done per Fill call, but it could be a bit expensive CPU-wise.
@cms-sw/dqm-l2 @dbruschi
A new Issue was created by @slava77.
@Dr15Jones, @sextonkennedy, @rappoccio, @smuzaffar, @antoniovilela, @makortel can you please review it and eventually sign/assign? Thanks.
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New categories assigned: dqm
@rvenditti,@syuvivida,@tjavaid,@nothingface0,@antoniovagnerini you have been requested to review this Pull request/Issue and eventually sign? Thanks