HistogramObserver#

class HistogramObserver(bins=2048, upsample_rate=128, mode=QuantMode.SYMMERTIC, eps=0.00001, dtype='qint8', **kwargs)[source]#

A MinMaxObserver using running histogram of tensor values for min/max updating. Usually used for calibration quantization.

Parameters:

  • bins (int) – number of bins to use for the histogram.

  • upsample_rate (int) – which ratio to interpolate histograms in.

  • mode (QuantMode) – set quantization mode.

  • eps (float) – a initial maximum value to avoid division by zero problem.

  • dtype (Union[str, QuantDtypeMeta]) – a string indicating which dtype to collect scale and zero_point of.