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First, is to do a baseline comparison of the overlay and non-overlay versions. I rigged a direct comparison through the systest interface for GR v17r7.
The GR v17r7 run shows the AllGammaOverlay test with the overlays disabled (exactly the same as normal AllGamma). The run GR v17r7OVRLY has overlays turned on. This allows an easy comparison of AllGamma against AllGammaOverlay.
See the failed plots. (Should be comparison of v17r7OVRLY against v17r7 for AllGammaOverlayTest). The AllGamma histograms have not changed for v17r7 up to v17r15. You can do the same trick to compare the later overlay tests with the normal AllGamma test using the v17r7 AllGammaOverlay version.
One thing I am trying to confirm is that the overlay test is working properly and as desired. For example, is it okay to run these with ideal calibrations? Any other configuration issues?
In general, there are more digis and less 0's for all the subsystems. Energies This evolves a bit with the later GR versions. Energy features are shifted a bit higher in some distributions. More triggers and more vetoes. These are not surprises. Examples below.
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