note: support asynchronous sched_note_printf output#13949
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Do not format immediately when calling sched_note_printf, but delay formatting until dump trace. After turning on SYSTEM_NOTE, similar asynchronous syslog functions can be achieved. Signed-off-by: yinshengkai <yinshengkai@xiaomi.com>
Signed-off-by: yinshengkai <yinshengkai@xiaomi.com>
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Summary
Change 1: Replace sched_note_printf with sched_note_bprintf to delay string formatting and improve sched_note_printf execution speed (bprintf does not format parameters, but only parses the format string and saves parameters for delayed formatting)
Change 2: Supports obtaining variable parameter types at compile time and saving function parameters at runtime without parsing the format string. This method does not require parsing the format string, so the execution speed will be faster than bprintf
These two functions can use sched_note_printf to replace syslog, providing a faster log storage method.
And it does not rely on the format string. The format string in syslog can be removed to reduce the size of the final bin file.
Impact
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Testing
sim