Hi Dave,
Thank you for your response and help.
Please find the additional details below.
VPP Version *21.10*
We are creating a process node* rtb-vpp-epoll-process *to handle control
plane events like interface add/delete, route add/delete.
This process node waits for *10ms* of time (Not Interested in any events )
once 10ms is expired it will process control plane events mentioned above.
code snippet looks like below
```
static uword
rtb_vpp_epoll_process (vlib_main_t *vm,
vlib_node_runtime_t *rt,
vlib_frame_t *f)
{
...
...
while (1) {
vlib_process_wait_for_event_or_clock (vm, 10e-3);
vlib_process_get_events (vm, NULL);
rtb_event_loop_run_once(); *<---- controlplane events handling*
}
}
```
What we observed is that sometimes (when there is a high controlplane load
like request to install more routes) "rtb-vpp-epoll-process" is suspended
and not scheduled furever. this we found by using "show runtime
rtb-vpp-epoll-process"* (*in "show runtime rtb-vpp-epoll-process" command
output suspends counter is not incrementing.)
*show runtime output in working case :*
```
DBGvpp# show runtime rtb-vpp-epoll-process
Name State Calls Vectors
*Suspends* Clocks Vectors/Call
rtb-vpp-epoll-process any wait 0 0
*192246* 1.91e6 0.00
DBGvpp#
DBGvpp# show runtime rtb-vpp-epoll-process
Name State Calls Vectors
*Suspends* Clocks Vectors/Call
rtb-vpp-epoll-process any wait 0 0
*193634* 1.89e6 0.00
DBGvpp#
```
*show runtime output in issue case :```*
DBGvpp# show runtime rtb-vpp-epoll-process
Name State Calls Vectors
*Suspends* Clocks Vectors/Call
rtb-vpp-epoll-process any wait 0
0 *81477* 7.08e6 0.00
DBGvpp# show runtime rtb-vpp-epoll-process
Name State Calls Vectors
*Suspends * Clocks Vectors/Call
rtb-vpp-epoll-process any wait 0
0 *81477* 7.08e6 0.00
*```*
Other process nodes like lldp-process,
ip4-neighbor-age-process, ip6-ra-process running without any issue. only
"rtb-vpp-epoll-process" process node suspended forever.
Please let me know if any additional information is required.
Hi Jinsh,
Thanks for pointing me to the issue you faced. The issue I am facing looks
similar.
I will verify with the given patch.
Thanks and Regards,
Sudhir
On Sun, Feb 19, 2023 at 6:19 AM jinsh11 <[email protected]> wrote:
> HI：
>
> -
>
> I have the same problem，
> bfd process node stop running. I raised this issue,
>
> https://lists.fd.io/g/vpp-dev/message/22380
> I think there is a problem with the porcess scheduling module when using
> the time wheel.
>
>
>
>
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