[orchagent] implement ring buffer feature with a flag

[a114j0y]

What I did

• add a ring thread for orchdaemon, which would be kicked off if gRingMode is turned on
• support ring buffer feature, currently only enabled for route table executor, which has a scaled use case
• fix the covariant return type issue of swss::TableBase* Consumer::getConsumerTable() const override
  • it should return swss::ConsumerTableBase *

Why I did it

• increase the speed for APP_ROUTE_TABLE consumers doing tasks

How I verified it
measure the performance with PerformanceTimer

[siqbal1986]

can you please add sone swss tests for this functionality. There are no tests mentioned in the PR. if you have created a separate PR , Please link it here.

[siqbal1986]

what is hte need of rign buffer. Can you please add some detail regarding its need.

[a114j0y]

rebased and conflict resolved @siqbal1986 could you help re-approve it? : )

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[mssonicbld]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[eddieruan-alibaba]

@prsunny do you have any more comments?

[mssonicbld]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[mssonicbld]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[mssonicbld]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[mssonicbld]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[yuezhoujk]

/azp run Azure.sonic-swss

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[mssonicbld]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[mssonicbld]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[liuh-80]

@a114j0y , I recently testing improve route performance with ring buffer/zmq/multiple-db, and the ring buffer sometimes will cause stuck when there are massive bgp routes, I check this on a lab mellanox 4600 device which has 12000+ BGP routes:

~$ sonic-db-cli ASIC_DB eval "return #redis.call('keys', 'ASIC_STATE:SAI_OBJECT_TYPE_ROUTE_ENTRY*')" 0
12951

~$ show ip bgp summary

IPv4 Unicast Summary:
BGP router identifier 10.1.0.32, local AS number 65100 vrf-id 0
BGP table version 22923
RIB entries 12851, using 1644928 bytes of memory
Peers 24, using 494208 KiB of memory
Peer groups 2, using 128 bytes of memory

Neighbhor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd NeighborName

---

10.0.0.1 4 65200 3201 5537 22923 0 0 00:00:34 6370 ARISTA01T2
10.0.0.5 4 65200 3201 5537 22923 0 0 00:00:35 6370 ARISTA03T2
10.0.0.9 4 65200 3201 5537 22923 0 0 00:00:34 6370 ARISTA05T2
10.0.0.13 4 65200 3201 5537 22923 0 0 00:00:34 6370 ARISTA07T2
,,,

Then run "sudo config bgp shutdown all" or "sudo config bgp startup all", and check the syslog, some time I get following log:

2025 Mar 17 06:56:42.396204 DEVICE_NAME WARNING swss#orchagent: :- processAnyTask: ring is full...push again
2025 Mar 17 06:56:42.439894 DEVICE_NAME INFO swss#rsyslogd: imuxsock[pid: 48, name: /usr/bin/orchagent] from bjw2-can-4600c-3:orchagent: begin to drop messages due to rate-limiting
2025 Mar 17 06:57:42.043606 DEVICE_NAME WARNING swss#supervisor-proc-exit-listener: Process 'orchagent' is stuck in namespace 'host' (1.0 minutes).
2025 Mar 17 06:58:13.002017 DEVICE_NAME INFO swss#rsyslogd: imuxsock[pid: 48, name: /usr/bin/orchagent]: 23441221 messages lost due to rate-limiting (20000 allowed within 300 seconds)
2025 Mar 17 06:58:13.082530 DEVICE_NAME INFO swss#rsyslogd: imuxsock[pid: 48, name: /usr/bin/orchagent] from <DEVICE_NAME :orchagent>: begin to drop messages due to rate-limiting

Seems there are some deadlock issue in the ring buffer code.