Bad performance for int8 inference on XuanTie 906 (RISC-V)

[vassilijnadarajah]

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I was wondering if maybe anyone knows or might have an idea as to why the inference time on the XuanTie 906 (RISC-V) processor is so slow for int8 models?
The image can easily be reproduced by running the NCNN benchmark on the Alwinner D1 (1x XuanTie 906). The displayed numbers are the runtimes in milliseconds.

Thanks!

[nihui]

Currently ncnn lacks good optimization for int8 models using risc-v and rvv

You may be interested in contributions here
plctlab#2