rte_exit() does not terminate the program -- is it a bug or a new feature?
Gabor LENCSE
lencse at hit.bme.hu
Sun Sep 17 21:37:30 CEST 2023
Dear Stephen,
Thank you very much for your answer. Please see my answers inline.
> Not sure what the tx and rx polling loops look like in your application.
In short: they surely finish.
In more details:
- The receivers finish due to timeout. In my case the receiving threads
finished OK. (Their CPU cores became idle.)
- The sender threads check if sending happened within timeout time only
AFTER all test frames were sent, that is, the sending loop finished. (It
is done so to spare 1 branch instruction in the innermost sending loop.)
So the sending loop is already finished when the rte_exit() is called.
*My problem is that calling the rte_exit() function does not terminate
the application.*
> But they need to have some way of forcing exit, and you need to set that
> flag before calling rte_exit().
>
> See l2fwd and force_quit flag for an example.
I have looked into its source code. I understand that it sets the
"force_quit" flag when it receives a SIGINT or SIGTERM signal, and the
nonzero value of the "force_quit" flag causes to finish the while cycle
of the "l2fwd_main_loop(void)".
However, l2fwd also uses the "rte_exit()" function to terminate the
program. The only difference is that it calls the "rte_exit()" function
from the main program, and I do so in a thread started by the
"rte_eal_remote_launch()" function.
Is there any constraint for usage the "rte_eal_remote_launch()"
function? (E.g., it may be called only from the main thread? I did not
see anything like that int the documentation.)
Best regards,
Gábor
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