The last couple of shows I have noticed a weird thing, on both Arena 6 and 7.
I usually program my show on auto frame rate, to check I'm not pushing the hardware too much and dropping below my target framerate. Once everything is programmed and working nicely I'll then change from auto to lock at 50fps, so I'm not causing any issues for the camera guys (25/50 in my country).
The last couple of jobs though, my auto framerate has been mid 50s, but when I lock at 50 the fps counter in Arena is showing a variety of numbers around 48, only occasionally reaching 50. Any idea why specifying a framerate like that would incur such a performance penalty?
(When I'm massively underutilising my hardware, say one vt of playback, the framerate lock holds 50.00 with only very occasional fluctuations above or below)