ptrendx commented on issue #9774: mx.io.ImageRecordIter does not respect dtype argument / FP16 performance on Volta URL: https://github.com/apache/incubator-mxnet/issues/9774#issuecomment-367150719 Just in case try synthetic data with `--benchmark 1` - with 24 threads I bet you are still limited by the IO. Try also adding index file to speed up the IO with the `--data-train-idx` parameter (although depending on whether your data is cached in RAM or not, you may need to run it twice to get the actual speedup from this as it introduces global random shuffling).
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