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2026-06-25 - 04:22
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack1slot2.osadl.org (updated Thu Jun 25, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
644924443,0sleep00-21swapper/019:21:330
3220724435,0sleep20-21swapper/219:21:112
654423927,0sleep30-21swapper/319:22:403
682823627,0sleep10-21swapper/119:25:541
8305060,0irq/26-0000:00:10140-21proc_pri21:16:243
69289960,0cyclictest3765-21date20:31:032
69149960,0cyclictest0-21swapper/021:32:250
35160,0ktimersoftd/30-21swapper/321:41:483
35160,0ktimersoftd/30-21swapper/300:00:233
339960,0migration/39143-21sh22:16:063
339960,0migration/36657-21sh23:09:483
339960,0migration/331703-21timerandwakeup00:36:293
339960,0migration/321921-21sh00:14:093
339960,0migration/319587-21sh22:40:183
339960,0migration/318177-21sh00:49:463
339960,0migration/317105-21munin-node23:16:193
339960,0migration/312985-21runrttasks00:08:203
29805060,0irq/28-eth0-rx-15475-21cut23:51:223
29805060,0irq/28-eth0-rx-0-21swapper/323:01:143
149960,0migration/0891-21gltestperf20:06:170
149960,0migration/027419-21gltestperf22:26:180
149960,0migration/012704-21fschecks_time23:51:180
8305050,0irq/26-0000:00:31422-21wc00:21:042
69289955,0cyclictest0-21swapper/223:09:212
69289955,0cyclictest0-21swapper/221:41:032
69289954,0cyclictest29104-1kworker/2:0H23:28:062
69289954,0cyclictest29104-1kworker/2:0H23:28:062
69289950,0cyclictest0-21swapper/223:50:582
69289950,0cyclictest0-21swapper/223:45:272
69289950,0cyclictest0-21swapper/223:00:122
69289950,0cyclictest0-21swapper/200:42:412
69149955,0cyclictest0-21swapper/023:22:370
69149955,0cyclictest0-21swapper/000:12:350
69149953,0cyclictest3810-21kworker/0:123:44:230
69149950,0cyclictest0-21swapper/022:31:320
69149950,0cyclictest0-21swapper/022:02:030
339950,0migration/38311-21munin-node19:26:183
339950,0migration/33007-21munin-node20:26:293
339950,0migration/329531-21kthreadcore23:41:203
339950,0migration/328315-21taskset19:39:223
339950,0migration/328261-21kthreadcore00:16:233
339950,0migration/327379-21df_abs21:31:183
339950,0migration/320226-21kthreadcore19:56:203
339950,0migration/318324-21kthreadcore22:56:213
339950,0migration/31654-21munin-node22:11:213
339950,0migration/312829-21kthreadcore23:31:223
339950,0migration/31202-21kthreadcore21:51:223
329950,0watchdog/36007-21kthreadcore21:36:193
329950,0watchdog/311717-21perl19:51:183
329950,0watchdog/30-21swapper/300:41:193
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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