[root@eight ~]# uname -a Linux eight 4.18.0-408.el8.x86_64 #1 SMP Mon Jul 18 17:42:52 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux [root@eight ~]# perf kwork record sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.328 MB perf.data (374 samples) ] [root@eight ~]# perf evlist irq:irq_handler_entry irq:irq_handler_exit irq:softirq_raise irq:softirq_entry irq:softirq_exit dummy:HG # Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events [root@eight ~]# perf kwork report -b libbpf: elf: skipping unrecognized data section(15) .eh_frame libbpf: elf: skipping relo section(25) .rel.eh_frame for section(15) .eh_frame Starting trace, Hit to stop and report ^C Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end | -------------------------------------------------------------------------------------------------------------------------------- (s)TIMER:1 | 0002 | 0.496 ms | 65 | 0.013 ms | 2382.698020 s | 2382.698033 s | (s)BLOCK:4 | 0000 | 0.288 ms | 19 | 0.030 ms | 2384.865354 s | 2384.865384 s | (s)SCHED:7 | 0000 | 0.262 ms | 92 | 0.013 ms | 2382.707003 s | 2382.707016 s | (s)SCHED:7 | 0002 | 0.252 ms | 68 | 0.015 ms | 2384.863056 s | 2384.863071 s | (s)TIMER:1 | 0000 | 0.248 ms | 31 | 0.013 ms | 2384.868004 s | 2384.868018 s | (s)NET_RX:3 | 0003 | 0.164 ms | 8 | 0.048 ms | 2385.907972 s | 2385.908020 s | ahci[0000:00:1f.2]:47 | 0000 | 0.161 ms | 19 | 0.015 ms | 2382.703154 s | 2382.703169 s | (s)SCHED:7 | 0001 | 0.123 ms | 46 | 0.005 ms | 2384.020008 s | 2384.020013 s | (s)SCHED:7 | 0003 | 0.074 ms | 18 | 0.007 ms | 2384.840080 s | 2384.840087 s | (s)RCU:9 | 0003 | 0.072 ms | 17 | 0.008 ms | 2384.866045 s | 2384.866053 s | (s)TIMER:1 | 0001 | 0.066 ms | 10 | 0.009 ms | 2383.391080 s | 2383.391089 s | (s)TIMER:1 | 0003 | 0.065 ms | 11 | 0.009 ms | 2384.735081 s | 2384.735090 s | (s)RCU:9 | 0002 | 0.045 ms | 12 | 0.011 ms | 2382.695008 s | 2382.695019 s | enp0s25:46 | 0003 | 0.037 ms | 8 | 0.006 ms | 2385.907958 s | 2385.907964 s | (s)RCU:9 | 0000 | 0.008 ms | 7 | 0.002 ms | 2382.695003 s | 2382.695005 s | (s)RCU:9 | 0001 | 0.005 ms | 5 | 0.002 ms | 2382.696003 s | 2382.696005 s | -------------------------------------------------------------------------------------------------------------------------------- [root@eight ~]# perf kwork latency -b libbpf: elf: skipping unrecognized data section(15) .eh_frame libbpf: elf: skipping relo section(25) .rel.eh_frame for section(15) .eh_frame Starting trace, Hit to stop and report ^C Kwork Name | Cpu | Avg delay | Count | Max delay | Max delay start | Max delay end | -------------------------------------------------------------------------------------------------------------------------------- (s)RCU:9 | 0000 | 0.011 ms | 10 | 0.022 ms | 2394.894047 s | 2394.894069 s | (s)RCU:9 | 0002 | 0.010 ms | 6 | 0.026 ms | 2395.103080 s | 2395.103106 s | (s)TIMER:1 | 0002 | 0.007 ms | 3 | 0.009 ms | 2397.663079 s | 2397.663087 s | (s)TIMER:1 | 0001 | 0.007 ms | 24 | 0.008 ms | 2397.912078 s | 2397.912086 s | (s)RCU:9 | 0001 | 0.007 ms | 13 | 0.015 ms | 2396.943080 s | 2396.943095 s | (s)TIMER:1 | 0000 | 0.006 ms | 67 | 0.013 ms | 2396.759020 s | 2396.759033 s | (s)TIMER:1 | 0003 | 0.006 ms | 5 | 0.008 ms | 2394.877043 s | 2394.877051 s | (s)SCHED:7 | 0000 | 0.006 ms | 93 | 0.013 ms | 2396.892081 s | 2396.892094 s | (s)RCU:9 | 0003 | 0.005 ms | 28 | 0.012 ms | 2394.868026 s | 2394.868038 s | (s)SCHED:7 | 0002 | 0.005 ms | 7 | 0.011 ms | 2397.663083 s | 2397.663094 s | (s)SCHED:7 | 0003 | 0.005 ms | 26 | 0.009 ms | 2396.703084 s | 2396.703093 s | (s)SCHED:7 | 0001 | 0.004 ms | 59 | 0.011 ms | 2397.151081 s | 2397.151092 s | (s)NET_RX:3 | 0003 | 0.004 ms | 8 | 0.010 ms | 2397.920385 s | 2397.920394 s | -------------------------------------------------------------------------------------------------------------------------------- [root@eight ~]#