>The Following is experiment environment: > - kernel version: 4.4.0 > - RAM: 8GB > - UFS 2.1 (64GB) > >Result: >+-------+----------+----------+-------+ >| cycle | baseline | with HPB | diff | >+-------+----------+----------+-------+ >| 1 | 272.4 | 264.9 | -7.5 | >| 2 | 250.4 | 248.2 | -2.2 | >| 3 | 226.2 | 215.6 | -10.6 | >| 4 | 230.6 | 214.8 | -15.8 | >| 5 | 232.0 | 218.1 | -13.9 | >| 6 | 231.9 | 212.6 | -19.3 | >+-------+----------+----------+-------+ > >We also measured HPB performance using iozone. >Here is my iozone script: >iozone -r 4k -+n -i2 -ecI -t 16 -l 16 -u 16 >-s $IO_RANGE/16 -F mnt/tmp_1 mnt/tmp_2 mnt/tmp_3 mnt/tmp_4 mnt/tmp_5 >mnt/tmp_6 mnt/tmp_7 mnt/tmp_8 mnt/tmp_9 mnt/tmp_10 mnt/tmp_11 mnt/tmp_12 >mnt/tmp_13 mnt/tmp_14 mnt/tmp_15 mnt/tmp_16 > >Result: >+----------+--------+---------+ >| IO range | HPB on | HPB off | >+----------+--------+---------+ >| 1 GB | 294.8 | 300.87 | >| 4 GB | 293.51 | 179.35 | >| 8 GB | 294.85 | 162.52 | >| 16 GB | 293.45 | 156.26 | >| 32 GB | 277.4 | 153.25 | >+----------+--------+---------+ According to Samsung's iozone test result, HPB is going to boost random performance of rom on mobile, we believe it will help our customers on several occasions. WangQing
