Delay pmon non-critical daemon #4
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Signed-off-by: Yuanzhe, Liu <[email protected]>
Junchao-Mellanox
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Apr 26, 2024
yuazhe
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Dec 24, 2024
To fix a statistical issue. The original fix was done in FRRouting/frr#17297. However to accommodate 8.5.4 the patch in the PR was added. [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Core was generated by `/usr/lib/frr/zebra -A 127.0.0.1 -s 90000000 -M dplane_fpm_nl -M snmp'. Program terminated with signal SIGABRT, Aborted. #0 0x00007fccd7351e2c in ?? () from /lib/x86_64-linux-gnu/libc.so.6 [Current thread is 1 (Thread 0x7fccd6faf7c0 (LWP 36))] (gdb) bt #0 0x00007fccd7351e2c in ?? () from /lib/x86_64-linux-gnu/libc.so.6 #1 0x00007fccd7302fb2 in raise () from /lib/x86_64-linux-gnu/libc.so.6 #2 0x00007fccd72ed472 in abort () from /lib/x86_64-linux-gnu/libc.so.6 #3 0x00007fccd75bb3a9 in _zlog_assert_failed (xref=xref@entry=0x7fccd7652380 <_xref.16>, extra=extra@entry=0x0) at ../lib/zlog.c:678 #4 0x00007fccd759b2fe in route_node_delete (node=<optimized out>) at ../lib/table.c:352 #5 0x00007fccd759b445 in route_unlock_node (node=0x0) at ../lib/table.h:258 #6 route_next (node=<optimized out>) at ../lib/table.c:436 #7 route_next (node=node@entry=0x56029d89e560) at ../lib/table.c:410 #8 0x000056029b6b6b7a in if_lookup_by_name_per_ns (ns=ns@entry=0x56029d873d90, ifname=ifname@entry=0x7fccc0029340 "PortChannel1020") at ../zebra/interface.c:312 #9 0x000056029b6b8b36 in zebra_if_dplane_ifp_handling (ctx=0x7fccc0029310) at ../zebra/interface.c:1867 #10 zebra_if_dplane_result (ctx=0x7fccc0029310) at ../zebra/interface.c:2221 #11 0x000056029b7137a9 in rib_process_dplane_results (thread=<optimized out>) at ../zebra/zebra_rib.c:4810 #12 0x00007fccd75a0e0d in thread_call (thread=thread@entry=0x7ffe8e553cc0) at ../lib/thread.c:1990 #13 0x00007fccd7559368 in frr_run (master=0x56029d65a040) at ../lib/libfrr.c:1198 #14 0x000056029b6ac317 in main (argc=9, argv=0x7ffe8e5540d8) at ../zebra/main.c:478
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Why I did it
After this pull request sonic-net#18295 , the pmon has been added to the start list in fast/warm reboot scenarios. However, certain non-critical daemons of pmon could be delayed, resulting in a saving of approximately 1 second in the reboot process. For performance considerations, especially as the current time usage of fast reboot is closer to 30 seconds limitation, this change could ease the pressure.
Work item tracking
How I did it
add a script as fast/warm reboot monitor and relative supervisord rlues.
once the script exited means the reboot process has ended, other delayed daemon would then initialize.
How to verify it
check the fast/warm reboot time usage
Which release branch to backport (provide reason below if selected)
Tested branch (Please provide the tested image version)
Description for the changelog
Link to config_db schema for YANG module changes
A picture of a cute animal (not mandatory but encouraged)