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DrGuenter

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Posts posted by DrGuenter

  1. Hello Digilent,

    How can one replace the installed micro sd-card?

    Background: I have setup a second one to easily switch between projects....

    I fact - it seems to be quite impossible... or is there a trick buried in the docs?
    Q: Is there some spring mechanism inside, where one requires a needle/screwdriver to push? 
     

    In fact - this is a severe drawback assuming that a removable media (SD Card) is removable...

    Consider this also as a mechanical complaint (which might lead to a one star comment) ...

    • next to the installation place of the micro sd-card 
    • the slot is located right in the middle of the board
    • AND points directly on neighbouring electronics,
    • on removal of the SD card, the resistors infront seem to have a high risk to get removed 
    • neglecting the fact, that there is sufficient space on the board
    • And a removable media is not to be used as a removable media
    • And it seems to be firmly attached

     

    Regards,

    Günter

  2. Hello everybody,

    I am curious, whether and how it is posible to increase the (Linux) clock frequency from 1.2gHz to 1.5gHz -
    as the xilinx chip can execute that fast. 

    Are there limitations - like cooling - which would inhibit the freqnency increase -> what are the reasons to limit the clock frequency down in an eval board? 

    thanks in advance,

    DrGuenter

    PS: Background - we are executing core mark pro (https://github.com/eembc/coremark-pro/) benchmark tests - and would love to see the full range - even if the cooling concept should be modified.

    /sys/devices/system/cpu# cat cpufreq/policy0/cpuinfo_max_freq
    1199999

    /sys/devices/system/cpu# cat cpufreq/policy0/scaling_available_frequencies
    299999 399999 599999 1199999

     

    WORKLOAD RESULTS TABLE

                                                     MultiCore SingleCore
    Workload Name                                     (iter/s)   (iter/s)    Scaling
    ----------------------------------------------- ---------- ---------- ----------
    cjpeg-rose7-preset                                  142.86      36.50       3.91
    core                                                  1.02       0.25       4.08
    linear_alg-mid-100x100-sp                            48.26      12.55       3.85
    loops-all-mid-10k-sp                                  1.89       0.65       2.91
    nnet_test                                             3.10       0.93       3.33
    parser-125k                                          20.51       8.33       2.46
    radix2-big-64k                                      134.14      82.20       1.63
    sha-test                                            238.10      70.42       3.38
    zip-test                                             75.47      20.00       3.77

    MARK RESULTS TABLE

    Mark Name                                        MultiCore SingleCore    Scaling
    ----------------------------------------------- ---------- ---------- ----------
    CoreMark-PRO                                       2682.54     851.67       3.15

     

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