why imx6q is so slow????

[利伟庄]

why it is so slow ????

when I use imx6sdk to develop a project,I set the program run in ocram and write the code like this:

arm_set_interrupt_state(false);

start_time=time_get_microseconds();

  for(idx=0;idx<1000000;idx++)

  {

     c=0xaaaaaaaa;

  }

  end_time=time_get_microseconds();

  arm_set_interrupt_state(true);

  used_time=end_time-start_time;

used_time=1213144;

so simple program it used one second!!!

why it is so slow???

[igorpadykov · Accepted solution]

Hi 利伟 庄

one needs to have caches enabled and the MMU to have

fastest execution. Note that internal OCRAM runs only at 132MHz.

Best regards

igor

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