need suggestion to debug CPU 100%

[calvin2021y]

I start 3 node raft node with a simple fsm store a count (so total 8 byte snapshot size).

after run some random leadership test, I can not start raft anymore.

I build with debug, and set LIBRAFT_TRACE=1, no print from app.

I run perf top -g -p pid, get this.

    30.51%     3.54%  libc.so.6           [.] epoll_pwait
    29.89%     9.77%  [kernel]            [k] do_epoll_wait
    20.77%     0.03%  [kernel]            [k] __schedule
    20.77%     0.00%  [kernel]            [k] schedule
    17.27%     0.00%  libc.so.6           [.] __libc_connect
    17.27%     0.00%  [kernel]            [k] tcp_v4_connect
    11.64%     0.00%  test_raft  [.] uv__run_timers
    10.38%    10.36%  test_raft  [.] uv__io_poll
    10.30%    10.30%  [kernel]            [k] tcp_select_initial_window
    10.30%     0.00%  [kernel]            [k] entry_SYSCALL_64_after_hwframe
    10.30%     0.00%  [kernel]            [k] do_syscall_64
    10.30%     0.00%  [kernel]            [k] __x64_sys_connect
    10.30%     0.00%  [kernel]            [k] __sys_connect
    10.30%     0.00%  [kernel]            [k] inet_stream_connect
    10.30%     0.00%  [kernel]            [k] __inet_stream_connect
    10.30%     0.00%  [kernel]            [k] tcp_connect
     8.19%     1.29%  test_raft  [.] uvClientTimerCb
     7.88%     7.88%  [kernel]            [k] pick_next_task_fair
     7.41%     7.41%  [unknown]           [.] 0000000000000000
     6.90%     6.90%  test_raft  [.] uv__stream_init
     6.75%     6.75%  [kernel]            [k] sock_alloc
     6.04%     6.04%  [kernel]            [k] finish_task_switch.isra.0
     4.96%     0.05%  [kernel]            [k] ctx_sched_in

any tips how to debug this case?

[calvin2021y]

I trace it done to raft_start with a lot logs(not snapshot yet), like around 44517 take long time in debug mode (12962ms), not slow in release mode.

how can I speed up raft_start process in debug mode?

my command is only 8 byte so I like to set the threshold to 64K or 128K