[ 1.967582] ata3.00: ATA-11: KINGSTON SUV400S37120G, 0C3J96R9, max UDMA/133
make-bcache -C /dev/sdb -B /dev/sda5 --discard --writeback mkfs.ext4 /dev/bcache0
$ fio-wrapper
test users size MB/s lat(ms) min max std IO/s 50us 1ms 4ms 10ms 20ms 50ms .1s 1s 2s 2s+
randread 1 4K 0.668 5.807 0.169 333.315 7.70 171 21 18 41 19 0 0 0
randread 1 8K 20.685 0.374 0.188 0.646 0.07 2647 100
randread 8 4K 5.434 5.738 0.129 309.444 15.16 1391 76 2 5 6 7 2 0
randread 8 8K 99.109 0.591 0.218 1.680 0.15 12686 99 0
randread 16 4K 91.103 0.642 0.130 157.470 2.37 23322 97 2 0 0 0 0 0
randread 16 8K 161.564 0.754 0.262 4.190 0.19 20680 93 6 0
randread 32 4K 165.856 0.720 0.158 9.443 0.21 42459 92 7 0
randread 32 8K 170.524 1.360 0.202 698.621 4.20 21827 50 47 0 0 0 0 0
randread 64 4K 173.397 1.312 0.146 179.394 2.20 44389 55 41 1 0 0 0 0
randread 64 8K 177.577 2.505 0.216 1507.100 17.17 22729 49 46 0 0 0 0 0 0
randrw 1 4K 0.486 7.361 0.170 156.999 10.64 124 61 7 18 9 1 0 0
randrw 1 8K 5.932 0.763 0.172 232.115 6.60 759 94 4 0 0 0 0
randrw 8 4K 1.760 10.820 0.193 140.872 13.29 450 25 21 17 23 10 1 0
randrw 8 8K 8.080 4.186 0.196 481.984 14.77 1034 28 57 11 2 0 0 0
randrw 16 4K 2.532 15.457 0.198 1098.100 51.57 648 23 24 27 16 4 0 2 0
randrw 16 8K 13.766 5.781 0.226 124.912 4.54 1762 22 25 46 5 0 0 0
randrw 32 4K 1.807 43.070 3.000 410.000 70.54 462 23 0 32 22 5 2 13
randrw 32 8K 13.477 12.200 1.000 496.000 18.37 1725 24 0 36 36 2 0 0
randrw 64 4K 3.721 42.943 0.371 1973.700 121.99 952 23 0 0 33 34 2 5 0
randrw 64 8K 10.483 31.560 10.000 1168.000 77.50 1341 23 0 0 26 46 2 0 0
read 1 4K 22.614 0.169 0.057 0.435 0.04 5789 100
read 1 8K 20.407 0.378 0.077 1.736 0.11 2612 99 0
read 1 32K 42.780 0.726 0.306 1.043 0.16 1368 99 0
read 1 128K 89.136 1.396 0.586 2.020 0.32 713 12 87
read 1 1M 138.527 7.190 2.000 10.000 1.95 138 12 78 9
read 8 4K 62.515 0.471 0.148 3.361 0.14 16003 99 0
read 8 8K 103.184 0.576 0.181 1.589 0.15 13207 99 0
read 8 32K 87.730 2.614 0.401 143.435 7.43 2807 14 79 3 1 0 0 0
read 8 128K 81.580 11.971 0.817 133.877 13.36 652 0 17 51 16 11 2 0
read 8 1M 80.301 96.880 3.000 249.000 39.93 80 0 0 4 9 31 53
read 16 4K 113.500 0.507 0.147 5.810 0.13 29056 99 0 0
read 16 8K 154.636 0.781 0.191 2.643 0.20 19793 87 12
read 16 32K 86.545 5.406 0.467 446.092 15.19 2769 3 75 13 1 2 2 0
read 16 128K 76.842 25.377 0.799 397.548 28.94 614 0 1 14 33 45 2 2
read 16 1M 81.282 190.780 3.000 626.000 80.93 81 0 0 0 11 2 84
read 32 4K 164.103 0.727 0.164 39.613 0.29 42010 92 7 0 0 0
read 32 8K 148.643 1.507 0.201 798.318 6.61 19026 46 51 1 0 0 0 0
read 32 32K 86.035 11.155 0.426 660.758 28.44 2753 1 60 11 11 12 1 1
read 32 128K 80.433 47.921 0.820 1382.200 51.76 643 0 0 5 8 61 19 3 0
read 32 1M 81.076 382.880 3.000 945.000 158.90 81 0 0 0 4 5 88
read 64 4K 169.521 1.368 0.157 1044.800 3.77 43397 56 40 1 0 0 0 0 0
read 64 8K 162.114 2.716 0.202 1523.900 20.03 20750 46 48 1 1 1 0 0 0
read 64 32K 91.668 21.792 0.307 2934.600 50.31 2933 1 60 8 2 3 22 1 0 0
read 64 128K 86.144 92.655 0.824 1003.300 65.01 689 0 1 6 7 2 60 21 0
read 64 1M 85.638 739.750 3.000 2024.000 330.39 85 0 0 0 1 2 77 17 0
write 1 4K 30.446 0.124 0.064 10.201 0.35 7794 98 1 0 0
write 1 8K 25.316 0.288 0.103 130.457 3.47 3240 99 0 0 0 0
write 1 32K 52.979 0.499 0.175 64.421 2.98 1695 99 0 0 0
write 1 128K 59.040 1.820 0.516 100.316 6.92 472 89 8 0 0 0
write 1 1M 56.238 14.920 4.000 107.000 18.53 56 78 6 12 3
write 8 4K 22.054 1.287 0.065 127.871 8.35 5645 95 2 0 0 1 0 0
write 8 8K 34.707 1.441 0.074 288.215 9.90 4442 94 2 0 0 1 0 0
write 8 32K 45.600 4.708 0.187 399.924 26.16 1459 95 0 0 0 0 1 1
write 8 128K 56.042 15.127 0.542 368.501 56.10 448 85 5 0 1 1 1 5
write 8 1M 153.018 42.450 3.000 317.000 53.98 153 1 25 1 55 10 5
write 16 4K 20.227 2.904 0.060 782.684 15.13 5178 89 2 0 2 4 0 0
write 16 8K 22.972 4.832 0.081 887.560 27.85 2940 93 1 0 0 1 1 1
write 16 32K 69.188 6.384 0.158 472.211 34.79 2214 91 3 0 0 1 0 2
write 16 128K 77.458 23.405 0.492 835.556 106.08 619 76 15 1 0 0 0 4
write 16 1M 63.776 204.560 3.000 960.000 308.24 63 0 52 3 13 1 30
write 32 4K 21.705 5.740 0.062 1228.300 41.82 5556 95 2 0 0 0 0 1 0
write 32 8K 29.369 8.490 0.075 2329.800 72.66 3759 94 2 0 0 0 0 2 0 0
write 32 32K 67.160 12.800 0.151 1434.400 71.03 2149 88 5 0 0 1 0 3 0
write 32 128K 83.673 37.042 0.479 1131.700 129.53 669 64 17 3 2 1 0 9 0
write 32 1M 84.100 262.000 3.000 3074.000 476.69 84 2 52 2 3 0 36 2
write 64 4K 21.272 11.693 0.059 1888.400 97.04 5445 96 2 0 0 0 0 1 0
write 64 8K 35.676 13.936 0.079 1634.900 88.44 4566 94 3 0 0 0 0 2 0
write 64 32K 54.699 35.694 0.160 2566.900 212.01 1750 93 3 0 0 0 0 1 1 0
write 64 128K 65.756 120.562 0.471 3291.100 542.52 526 82 8 1 0 1 0 0 1 3
write 64 1M 109.186 484.480 3.000 2904.000 725.32 109 2 56 3 3 0 8 21 4