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Benchmarks with and without UASP on A20 device

a guest Jul 21st, 2015 341 Never
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  1. root@pcduino3nano:~# lsusb
  2. Bus 001 Device 002: ID 174c:55aa ASMedia Technology Inc.
  3. Bus 002 Device 002: ID 174c:55aa ASMedia Technology Inc.
  4. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  5. Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  6. Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  7. Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  8.  
  9.  
  10. sda: Samsung EVO 840
  11. sdb: Seagate Barracuda
  12.  
  13. Unfortunately both enclosures containing ASMedia bridge chips that are blacklisted. I simply disabled the blacklisting for the UAS tests.
  14.  
  15. Sequential speed tests performed utilising "iozone -a -g 2000m -s 2000m -i 0 -i 1 -r4k" and "iozone -a -g 2000m -s 2000m -i 0 -i 1 -r1024k". Test system was a pcDuino3 Nano with 960MHz max. cpufreq and performance governor.
  16.  
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  19.  
  20. Kernel 4.1.1 without UAS:
  21.  
  22. sda: 2048000       4   36401   35694    31885    31975
  23. sdb: 2048000       4   33973   33736    34872    35000
  24.  
  25. RAID-0 (mkfs.btrfs -f -m raid1 -d raid0 /dev/sda1 /dev/sdb4):
  26.  
  27. raid-0: 2048000       4   55898   54675    58267    58371
  28. raid-0: 2048000       4   56823   55144    58399    58713
  29. raid-0: 2048000    1024   55325   54431    56796    57085
  30.  
  31. RAID-0 (mkfs.btrfs -f -m raid0 -d raid0 /dev/sda1 /dev/sdb4):
  32.  
  33. raid-0: 2048000       4   56580   54841    57956    58326
  34. raid-0: 2048000    1024   55766   54589    56926    57229
  35.  
  36. MD-RAID-0 (mdadm --create /dev/md0 --level=0 --raid-devices=2 --assume-clean /dev/sdb4 /dev/sda1 && mkfs.ext4 -b 4096 /dev/md0):
  37.  
  38. raid-0: 2048000       4   67100   67866    67527    67519
  39. raid-0: 2048000    1024   64186   66277    66112    66217
  40.  
  41.  
  42.  
  43.  
  44.  
  45. Kernel 4.1.2 with CONFIG_USB_UAS=m and disabled UAS blacklisting for ASM1051/ASM1053:
  46.  
  47. sda: 2048000       4   35991   37753    37129    37297
  48. sdb: 2048000       4   37532   37942    37412    37778
  49.  
  50. Accessing both disks at the same time:
  51.  
  52. sda: 2048000       4   34475   36279    35799    36478
  53. sdb: 2048000       4   36266   36561    37689    37958
  54.  
  55. RAID-0 (mkfs.btrfs -f -m raid1 -d raid0 /dev/sda1 /dev/sdb4):
  56.  
  57. raid-0: 2048000       4   72920   73634    75031    77766
  58. raid-0: 2048000       4   72505   73182    72964    71941
  59.  
  60. RAID-0 (mkfs.btrfs -f -m raid0 -d raid0 /dev/sda1 /dev/sdb4):
  61.  
  62. raid-0: 2048000       4   72435   73808    77563    74847
  63. raid-0: 2048000    1024   73877   73593    76350    74143
  64.  
  65. MD-RAID-0 (mdadm --create /dev/md0 --level=0 --raid-devices=2 --assume-clean /dev/sdb4 /dev/sda1 && mkfs.ext4 -b 4096 /dev/md0):
  66.  
  67. raid-0: 2048000       4   69961   71162    72975    69516
  68. raid-0: 2048000    1024   68981   70714    71832    70780
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