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2026-06-23 - 18:03
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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 Tue Jun 23, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1422627371,0sleep20-21swapper/207:21:512
1426425958,0sleep10-21swapper/107:22:151
14664995050,0cyclictest83050irq/26-0000:00:09:35:202
1444325039,0sleep30-21swapper/307:24:173
1457223524,0sleep00-21swapper/007:25:460
14662991515,0cyclictest3524-21snmpd11:18:220
146629999,0cyclictest3524-21snmpd11:53:280
8305060,0irq/26-0000:00:28121-21diskstats08:41:103
8305060,0irq/26-0000:00:27293-21perl07:56:093
8305060,0irq/26-0000:00:25436-21python07:51:183
8305060,0irq/26-0000:00:13610-21grep09:11:213
339960,0migration/330052-21sh11:53:443
339960,0migration/327114-21sh11:31:523
339960,0migration/325272-21sh12:26:563
339960,0migration/310532-21fschecks_time12:21:123
29805060,0irq/28-eth0-rx-7117-21timerwakeupswit11:01:243
29805060,0irq/28-eth0-rx-30143-21ssh09:42:003
29805060,0irq/28-eth0-rx-2678-21ssh10:21:393
146629960,0cyclictest0-21swapper/009:38:200
149960,0migration/04403-21sh11:39:350
149960,0migration/031528-21sh12:11:350
149960,0migration/030718-21sh09:43:190
149960,0migration/023156-21turbostat.cron08:15:560
149960,0migration/021432-21kthreadcore12:26:160
8305050,0irq/26-0000:00:95532chrt08:48:243
8305050,0irq/26-0000:00:4194-21kthreadcore08:01:143
8305050,0irq/26-0000:00:32434-21grep09:06:093
8305050,0irq/26-0000:00:25748-21if_eth009:01:143
8305050,0irq/26-0000:00:24485-21kthreadcore09:21:113
8305050,0irq/26-0000:00:21130-21taskset09:18:083
8305050,0irq/26-0000:00:15069-21sensors08:06:183
8305050,0irq/26-0000:00:10270-21ls08:51:103
8305050,0irq/26-0000:00:10010-21kthreadcore08:26:143
8305050,0irq/26-0000:00:0-21swapper/308:36:143
8305050,0irq/26-0000:00:0-21swapper/308:21:093
8305050,0irq/26-0000:00:0-21swapper/307:46:113
8305050,0irq/26-0000:00:0-21swapper/307:26:083
339950,0migration/37438-21kthreadcore10:06:153
339950,0migration/34687-21munin-node10:41:233
339950,0migration/34406-21taskset09:29:473
339950,0migration/33732-21gltestperf11:21:093
339950,0migration/33549-21switchtime07:36:203
339950,0migration/330972-21kthreadcore10:01:153
339950,0migration/323546-21munin-node08:56:183
339950,0migration/320367-21kthreadcore12:06:143
339950,0migration/313751-21munin-node10:31:113
339950,0migration/313311-21cpuspeed_turbos08:31:093
339950,0migration/311800-21cpuspeed_turbos11:26:113
329950,0watchdog/315251-21awk09:36:113
329950,0watchdog/310179-21cut12:01:163
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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