Hi Dave,
Thank you very much for your inputs. I will try this out and get back to
you with the results.
Regards,
Sudhir
On Mon, Feb 20, 2023 at 6:01 PM Dave Barach <v...@barachs.net> wrote:
> Please try something like this, to eliminate the possibility that some bit
> of code is sending this process an event. It’s not a good idea to skip the
> vec_reset_length (event_data) step.
>
>
>
> while (1)
>
> {
>
> uword event_type, * event_data = 0;
>
> int i;
>
>
>
> vlib_process_wait_for_event_or_clock (vm, 1e-2 /* 10 ms */);
>
>
>
> event_type = vlib_process_get_events (vm, &event_data);
>
>
>
> switch (event_type) {
>
> case ~0: /* handle timer expirations */
>
> rtb_event_loop_run_once ();
>
> break;
>
>
>
> default: /* bug! */
>
> ASSERT (0);
>
> }
>
>
>
> vec_reset_length(event_data);
>
> }
>
>
>
> *From:* vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> *On Behalf Of *Sudhir
> CR via lists.fd.io
> *Sent:* Monday, February 20, 2023 4:02 AM
> *To:* vpp-dev@lists.fd.io
> *Subject:* Re: [vpp-dev] process node suspended indefinitely
>
>
>
> 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 <jins...@chinatelecom.cn> 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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