xiaoxiang781216 commented on pull request #5432:
URL: https://github.com/apache/incubator-nuttx/pull/5432#issuecomment-1031237159


   > If this change will be rejected I will probably need to implement 
something like http://www.makelinux.net/ldd3/chp-7-sect-4.shtml and base POSIX 
timers and `timerfd` on top of it.
   
   Linux timer API even with the latest code still suffer the same issue as 
wdog since both use the tick as unit. You should add a new set API like hrtimer 
which use nanosecond unit: 
https://www.kernel.org/doc/html/latest/timers/hrtimers.html
   


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