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Posted to commits@mynewt.apache.org by GitBox <gi...@apache.org> on 2021/01/15 11:17:07 UTC

[GitHub] [mynewt-nimble] andrzej-kaczmarek commented on pull request #905: dialog_cmac: update XCVF_TX_SCHED_DELAY

andrzej-kaczmarek commented on pull request #905:
URL: https://github.com/apache/mynewt-nimble/pull/905#issuecomment-760881674


   tbh I do not really see any relation between mbox size and timer interrupt latency.
   
   Larger c2s mailbox means it's less likely that CMAC will spin waiting for free space in mailbox to write data and this would only matter if writes disable interrupts, but iirc they do not.
   Larger s2c mailbox means there may be more data for CMAC to read in single interrupt, but it should be enough that LL_TIMER2LLC irq has higher priority than SYS2CMAC, iirc the former has prio 2 while the latter has default prio (lowest).
   
   So do you know what exactly causes delays here?


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