[GitHub] [incubator-nuttx] hartmannathan commented on pull request #5424: timer: fix operation of periodic timers

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hartmannathan commented on pull request #5424:
URL: https://github.com/apache/incubator-nuttx/pull/5424#issuecomment-1030898525


   I'm not pushing back; I am thinking about what @patacongo wrote (also at [here](https://cwiki.apache.org/confluence/display/NUTTX/Short+Time+Delays)) about the API contract being to wait at least the given time and not knowing whether the (in that case delay, but in other cases non-delay usage) is starting in phase with the tick timer or not. I also see what you're saying about the timing being off by (in this case) 10%, which also seems wrong. I'm not sure what to suggest here. All I know if what I've always done: since software execution is sequential in nature and (with compiled code + multiple threads + CPU caches + other factors) it is not possible to predict what its timing will be, so my go-to solution is a hardware timer when I care about timing and software timers when all I want is to ensure that some time passes without caring too much about accuracy. I appreciate that this is not a good solution for everyone.


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