Currently, we're sampling every 250ms -- as a result, when we encounter a code that doesn't do much work and takes less than 250ms, energy deltas get reported as zero.
IBM documentation (Section 6.3 and 11.3.2.2) and says that the in-band power sensors get updated every 500us (0.5ms), but our previous correspondence with IBM collaborators recommended sampling at 50ms or slower (>50ms) for reliable data through OPAL.
We'll update the sampling rate in the IBM Port to be 50ms.
Currently, we're sampling every 250ms -- as a result, when we encounter a code that doesn't do much work and takes less than 250ms, energy deltas get reported as zero.
IBM documentation (Section 6.3 and 11.3.2.2) and says that the in-band power sensors get updated every 500us (0.5ms), but our previous correspondence with IBM collaborators recommended sampling at
50msor slower (>50ms) for reliable data through OPAL.We'll update the sampling rate in the IBM Port to be
50ms.