yamt commented on PR #15604:
URL: https://github.com/apache/nuttx/pull/15604#issuecomment-2601425747

   > > > Linux experts don't understand the hard real-time requirements, which 
is why key scheduling performance of nuttx is better than ThreadX.
   > > 
   > > 
   > > i guess we should avoid talking too much bad about other projects in a 
forum like this.
   > 
   > To be honest, this is also why it took 20 years for PREEMPT_RT to be 
merged into the master branch, and even then, PREEMPT_RT still fails to meet 
the requirements of determinism and hard real time system.
   
   just curious; are you using read/write in a hard-realtime logic?
   how do you estimate the upper cost of a read/write call?
   disable caches and count cpu-cycles?
   


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