540c028d60
Signed-off-by: pengyiqiang <pengyiqiang@xiaomi.com> Co-authored-by: pengyiqiang <pengyiqiang@xiaomi.com>
43 lines
1.2 KiB
ReStructuredText
43 lines
1.2 KiB
ReStructuredText
.. _profiler:
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========
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Profiler
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========
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As the complexity of the application increases, performance issues
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such as low FPS and frequent cache misses causing lag may arise.
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LVGL has internally set up some hooks for performance measurement
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to help developers analyze and locate performance issues.
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Porting
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*******
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To enable profiler, set :c:macro:`LV_USE_PROFILER` in ``lv_conf.h`` and configure the following options:
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- :c:macro:`LV_PROFILER_INCLUDE`: Provides a header file for the performance measurement function.
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- :c:macro:`LV_PROFILER_BEGIN`: Performance measurement start point function.
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- :c:macro:`LV_PROFILER_END`: Performance measurement end point function.
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Example
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*******
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The following is an example of output performance measurements using LVGL logging systems:
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Configure ``lv_conf.h``:
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.. code:: c
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#define LV_USE_PROFILER 1
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#define LV_PROFILER_INCLUDE "lvgl/src/hal/lv_hal_tick.h"
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#define LV_PROFILER_BEGIN uint32_t profiler_start = lv_tick_get()
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#define LV_PROFILER_END LV_LOG_USER("cost %" LV_PRIu32 "ms", lv_tick_elaps(profiler_start))
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Users can add the measured functions themselves:
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.. code:: c
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LV_PROFILER_BEGIN;
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my_func();
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LV_PROFILER_END;
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