[Jack-Devel] Non-blocking I/O in process callback

[Xavier Mendez]

Thanks for the quick response!

El 30/11/15 a les 14:10, Harry van Haaren ha escrit:
> Hi Xavi,
>
> If the time to complete the function is deterministic, it is real time safe.
>
> System calls (blocking ones) have "unbounded execution time", and as
> such are not rt safe.
>
> If your I/O will take a significant amount of time, I suggest offloading
> to a worker thread.
>
> Hth, -Harry
>
> On 30 Nov 2015 11:11, "Xavier Mendez" <me at jmendeth.com
> <mailto:me at jmendeth.com>> wrote:
>
>     Hello,
>
>     I'm wondering whether it's safe to do non-blocking reads or writes
>     from inside the process callback.
>
>      >From what I've seen, non-blocking I/O doesn't cause the process to
>     go into blocked state, and the realtime scheduler should not switch
>     to another process. But the documentation doesn't seem to allow them:
>
>      > [...] it cannot call functions that might block for a long time. This
>      > includes all I/O functions (disk, TTY, network), [...]
>
>     So, is it safe to use non-blocking I/O in the process callback?
>
>     Thank you,
>     Xavi
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