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performance tests/comparisons on A20-Lime2

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Oct 30th, 2014
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  1. I/O throughput using Samsung SSD 840 EVO 120GB on Olimex A20-OLinuXino-Lime2 (cpufreq settings: ondemand/1008 MHz)
  2.  
  3. a20-lime2_debian_3.4.90_release_1.img:
  4.  
  5. root@a20-lime2 /data # iozone -a -g 2000m -s 2000m -i 0 -i 1 -r ...K
  6.  
  7. KB reclen write rewrite read reread
  8. 1024000 4 43768 44307 171975 174550
  9. 1024000 32 43232 43592 158419 157417
  10. 1024000 512 42938 43425 153626 154983
  11. 1024000 16384 42893 43844 154888 156200
  12.  
  13. Bananian:
  14.  
  15. root@a20-lime2 /data # iozone -a -g 2000m -s 2000m -i 0 -i 1 -r ...K
  16.  
  17. KB reclen write rewrite read reread
  18. 1024000 4 44838 45076 204687 206614
  19. 1024000 32 43844 44796 190840 192428
  20. 1024000 512 44148 44020 169103 167532
  21. 1024000 16384 44261 43550 173133 175084
  22.  
  23. root@a20-lime2 /data # grep sda1 /etc/mtab
  24. /dev/sda1 /data ext4 rw,relatime,discard,stripe=384,data=ordered 0 0
  25.  
  26.  
  27. Network throughput measured with iperf and some TCP tuning applied (compare with http://forum.lemaker.org/thread-7102-1-1.html for details)
  28.  
  29. Olimex image on A20-Lime: never exceeding 450 MBits/sec
  30. Bananian on A20-Lime: 470-800 MBits/sec depending on direction
  31. Bananian on Banana Pi: 670-870 MBits/sec depending on direction
  32.  
  33. Startup recorded via serial console:
  34.  
  35. a20-lime2_debian_3.4.90_release_1 booting: http://pastebin.com/QSvXiM1j
  36. Bananian 14.09 booting on A20-LIME2: http://pastebin.com/xU9wHBPP
  37.  
  38. Obviously the Olimex image failed to let U-Boot read uEnv.txt.
  39. Kernel version differs (3.4.104 vs. 3.4.90)
  40. Kernel command line differs (Bananian adds "sunxi_g2d_mem_reserve=0 sunxi_ve_mem_reserve=0")
  41. The kernel Olimex uses seems to origin from Cubietech and contains both emac/gmac stuff
  42. Voltage difference regarding axp20_buck2: 1425mV vs. 1450mV
  43. sunxi WatchDog Timer and I2S enabled in Olimex image
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