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2026-06-12 - 10:54
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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 Fri Jun 12, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1458624031,0sleep10-21swapper/119:23:371
1447423927,0sleep20-21swapper/219:22:182
1435923725,0sleep00-21swapper/019:20:560
1446523223,0sleep30-21swapper/319:22:113
14779991111,0cyclictest3524-21snmpd21:55:060
147819970,0cyclictest0-21swapper/222:35:202
339960,0migration/36898-21munin-node23:05:193
339960,0migration/332190-21gltestperf23:20:143
339960,0migration/33029-21ntp_offset19:35:203
339960,0migration/321748-21sh00:26:343
339960,0migration/321409-21sh21:57:233
339960,0migration/319325-21sh00:06:233
339960,0migration/316967-21sh22:32:053
29805060,0irq/28-eth0-rx-26535-21irqstats23:35:183
29805060,0irq/28-eth0-rx-0-21swapper/321:43:333
147819960,0cyclictest0-21swapper/223:11:162
147799960,0cyclictest0-21swapper/022:28:450
149960,0migration/07713-21sh00:39:080
149960,0migration/01555-21sh23:55:320
149960,0migration/012913-21kthreadcore23:45:180
339950,0migration/38239-21latency_hist00:40:013
339950,0migration/36749-21kthreadcore00:00:183
339950,0migration/34075-21fschecks_time22:45:153
339950,0migration/33978-21kthreadcore22:05:183
339950,0migration/33595-21switchtime20:20:253
339950,0migration/328224-21kthreadcore20:40:163
339950,0migration/328060-21munin-node22:40:213
339950,0migration/326317-21kthreadcore20:15:173
339950,0migration/325750-21kthreadcore00:10:193
339950,0migration/325725-21kthreadcore21:00:173
339950,0migration/321336-21munin-node20:10:203
339950,0migration/314766-21kthreadcore20:30:173
329950,0watchdog/39194-21kthreadcore21:50:193
329950,0watchdog/35999-21sh00:35:243
329950,0watchdog/35086-21seq00:18:243
329950,0watchdog/331954-21cut21:25:193
329950,0watchdog/321078-21fschecks_count22:55:153
329950,0watchdog/318174-21python22:50:233
329950,0watchdog/316188-21iostat_ios19:25:153
329950,0watchdog/311277-21kthreadcore00:20:203
329950,0watchdog/30-21swapper/323:30:203
29815050,0irq/29-eth0-tx-6481-21ssh22:07:502
29815050,0irq/29-eth0-tx-3159-21munin-node22:45:242
29815050,0irq/29-eth0-tx-24838-21munin-node22:20:262
29815050,0irq/29-eth0-tx-20327-21cut23:50:182
29815050,0irq/29-eth0-tx-18956-21munin-node20:35:210
29815050,0irq/29-eth0-tx-15237-21munin-node20:10:210
29815050,0irq/29-eth0-tx-0-21swapper/223:28:592
29815050,0irq/29-eth0-tx-0-21swapper/021:25:230
29815050,0irq/29-eth0-tx-0-21swapper/020:44:540
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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