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Last Post 24 Apr 2014 09:06 AM by  bradb
Display performance with larger displays DM3730/AM3703
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Faizal Abdeen
New Member
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Posts:7


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21 Apr 2014 07:24 PM
    When driving a display at a high resolution (say 1024 x 768), how much performance is left on the module? Are there any estimates of worst case bus usage when the framebuffers are on the L3 ddr? It would be useful if someone could point me in the right direction on this topic.

    bradb
    Basic Member
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    Posts:203


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    24 Apr 2014 09:06 AM

    Here are the results of performance numbers based on running df_andi and LMBench more.    More information on df_andi is available at elinux.org/DirectFB and LMBench information is described at lmbench.sourceforge.net.

     

    DM37x Torpedo + Wireless SOM
    Linux BSP 2.4-2
    CPU Frequency = 1GHz
    Display 15 Display xga-16 Display xga-24
    480 x 272 @ 16bpp 1024x768 @ 16bpp 1024x768 @ 24bpp
    DirectFB Demo FPS 58.3 30.7 20.4
    df_andi
    Population 200 CPU Idle [%] 18.3 16 2.3
    DirectFB Demo FPS 29.6 15.3 10.1
    df_andi
    Population 200 CPU Idle [%] 2 0 0
    w/ LMBench*
    Mem Read/Write    		 MB/s 134.49 128.01 99.42
    *./bw_mem 7M rdwr
    Note: All while running serial debug (running df_andi) and two ssh terminals (one to launch 'top' and the other to launch 'bw_mem')

     

     
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