On 2019/7/18 10:47, ZHOU wrote:
> Dear sir or madam,
>
> ?0?2
>
> ????????????????????erofs????????????????????????????????????
>
> ?0?2
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> ????????????erofs??????????????????android p??????qcom sdm429???0?2kernel
> 4.9, ?0?2emmc5.1????????????
>
> ????????????kernel??????4.19??????????4.9??mkfs????????mkfs-dev??
>
> ????????????????xattr??capability??????????????????????????????????????
>
> ?0?2
>
> ??????????
>
> ????????????iozone??????iozone????????????????????????????????????????????????????????????????
>
> ????erofs????????????????./iozone -i 2 -s 300m -r 4k -+E -w -f
> ./vendor/tmp_file
??????????????????????????????????????fio????????
>
> ??????????????????????????????????????????ext4????????????????
>
> vendor??????????
>
> ext4 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2
> ?0?2 ?0?2 ?0?2 ?0?2 ?0?226113
>
> erofs no compress?0?2?0?2?0?2?0?2?0?2?0?2?0?2?0?2?0?2?0?2?0?2 ?0?2 ?0?220970
????????????????????????????????????direct I/O??erofs??????direct I/O??
??????
>
> erofs cp 4 ratio ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?221485
>
> erofs cp 100 ratio?0?2?0?2?0?2?0?2?0?2?0?2?0?2?0?2?0?2?0?2 ?0?2 ?0?2?0?2 19949
>
> f2fs??userdata???0?2?0?2?0?2?0?2?0?2?0?2?0?2?0?2?0?2?0?2?0?2?0?2 ?0?2 ?0?2
> 32766
>
> ?0?2
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> loop??????????????????????userdata??mount??tmp????????
>
> ext4 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?2 ?0?229561 ?0?2
> 30318?0?2 29531
>
> erofs cp 20 ratio?0?2 ?0?2?0?2 30525 ?0?2 30630?0?2 30037
>
> ?0?2
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> ??????????????erofs??ext4??????????????
>
> ?0?2
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> ??????????????????????????ext4???????????????????????????????????????????????
>
> ?0?2
>
> ??????????
>
> ?0?2
>
> --?0?2
>
> Thanks & Regards,
>
> hengguo.zhou?0?2??????
>
