Some question about the lv_mem uesed

General discussion
1

I have three questions about memory of lvgl.

  1. LV_MEM_SIZE is defined. Then all the memory used by lvgl is whether in the LV_MEM_SIZE?
  2. How to know the heap memory of lvgl when is running?
    3.how to get the heap memory used data?

My platform is STM32H743 with limited ram .