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About SD read/write data performance!

gomo
Genius 3400 points

Hi all:

I have download IPNC 2.0 SDK and bin file from APPRO, flash to IPNC DM368, using a software named “tiotest” to test SD and USB performance, the result is lower than introduction in document downloaded from APPRO ftp which named "SDCard_Throughput_IPNC_DM36x.pdf":

Test env: DM368, 432MHz, DDR 336MHz
SD: 16G Kington SDCard
Write block size:1M Bytes

Our result is:

 

 

Introduce in document "SDCard_Throughput_IPNC_DM36x.pdf"

Above Pic had very different result. Anybody can help me?

Thanks a lot. 

 

 

 

  • 0
    TI__Mastermind 19985 points

    Gomo,

    We do simple file write test using fwrite() and profile that operation. Can you please tell us what does "tiotest" application do?

    Regards,

    Anshuman

  • 0 in reply to Anshuman Saxena
    Genius 3400 points

    Sorry，what I said “tiotest” is test program, it's comliled from tiobench. It can be download from sourceforge web.

    The bin files (uImage and filesys) are also downloaded from APPRO FTP,   and kernel version is 2.6.18.

    whether is it need some SDHC patches?  Is it exist?

    Thanks a lot !

  • 0 in reply to gomo
    TI__Mastermind 19985 points

    Which version of IPNC release have you used for uImage and filesystem? We have already put the SDHC patch to the kernel image of IPNC ver 2.0 and hence expected the performance numbers to be matching the document in the release. Without the SDHC patch, surely you will see a lower performance.

    Regards,

    Anshuman

  • 0 in reply to Anshuman Saxena
    Genius 3400 points

    Yes. I'm sure the IPNC version is 2.0. and I'm using uImage and filesystem which  also  unzip from download file. it's named uImage_ipnc_dm368_2.0.0  and cramfsImage_ipnc_dm368_2.0.0.   I don't recompile the kernel. and using the bin of  uImage_ipnc_dm368_2.0.0 directly.

    And I compare the kernel source in IPNC version 2.0 and 1.9, It have large changes in driver of  MMC and YAFFS filesystem. 

    Need I recompile the uImage and then flash to IPNC camera?

    Thanks!