Add P99 method with configurable thresholds
Summary:
Update the P99 quantization method with configurable thresholds.
Add dnnlowp options for the configuration.
Test Plan: buck run mode/opt experimental/summerdeng/xray_image:test_net_quantization -- --model_path=/mnt/public/summerdeng/xray_image/models/oct_resnext101_50_2B_pretrained.mdl --batch_size=1 --test_max_images=100 --octave_conv --octave_conv_ratio=0.5 --output_dir=/mnt/public/summerdeng/xray_image/output --quantize --histogram_file=/mnt/public/summerdeng/xray_image/activation_histograms/oct_resnext101_50_2B_pretrained_hist_200k_compiled.txt --int8_model_type="mdl" --int8_model_mdl_name="int8_oct_resnext101_50_2B_l2_nongroupwise.mdl" --skip_first_conv --weight_quant="l2" --activation_quant="p99" --activation_p99_threshold=0.999 --measure_quantization_error
Reviewed By: amylittleyang
Differential Revision: D16626158
fbshipit-source-id: 7718dcf429f73aa54e82a6b6f6e631d94e3a134c
