eMMC Performance test

[stu...@gmail.com]

Dear All;

Thank you soo much for all your efforts.

I have a A20 based board, named INTERRA-3. It incorporates a SANDISK eMMC instead of a NAND Flash. I can run both stock android and sunxi kernel with debian on it.

Basically, everything is OK, but I am not happy with the SDIO interface speed.

Please see my benchmarking test against SAMSUNG NOTE-2 and SAMSUNG NOTE-3: http://s9.postimg.org/xkp1o22nz/compare.jpg

As you see, the READ speed is extremely slow when we compare with Samsung devices.

This test is done with the same application from Google Play Store, and it was using AW kernel.

However, I get same speeds when I use sunxi kernel ( I tested according to here: https://romanrm.net/dd-benchmark )

Is it a hardware limitation, or is it possible to improve speeds via kernel driver ?

FYI, here is my booting log : http://sprunge.us/YWhS

Many thanks for the answers.

BR.

Sertac

[Olliver Schinagl]

You are getting about 2 to 3 times of nand performance. I'm not sure if
the eMMC is capable of doing more, but it could be SDIO performance,
though I wouldn't bet on it. Your performance isn't horrible to be
honest really.
>
> BR.
>
> Sertac
>

[stu...@gmail.com]

Olliver, thank you very much for your reply.

However, if you see datasheet of the eMMC here: http://94.73.155.26/sdin7du2-8g.pdf

As you see ( see page 14 ), my write speed is OK, but my read speed is extremely slow.

Can you give me some idea, how to improve it?

Also, did you see error messages from kernel regarding MMC during boot ?