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2026-06-02 - 15:03
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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 02, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31612997171,0cyclictest8847-21md0_resync09:34:412
3133926261,0sleep10-21swapper/107:21:581
31610996161,0cyclictest8846-21md1_resync09:34:410
3117525049,0sleep00-21swapper/007:20:090
3139523228,0sleep30-21swapper/307:22:363
3122322826,0sleep20-21swapper/207:20:392
8305070,0irq/26-0000:00:0-21swapper/311:54:293
316129970,0cyclictest0-21swapper/209:42:452
8305060,0irq/26-0000:00:8735-21munin-plugin-st09:39:133
8305060,0irq/26-0000:00:3874-21chrt07:49:223
8305060,0irq/26-0000:00:32285-21diskstats09:14:273
8305060,0irq/26-0000:00:30442-21kthreadcore09:49:313
8305060,0irq/26-0000:00:29247-21python11:19:413
8305060,0irq/26-0000:00:25710-21fschecks_time12:34:273
8305060,0irq/26-0000:00:22695-21rm09:28:353
8305060,0irq/26-0000:00:18393-21ps12:48:293
8305060,0irq/26-0000:00:15383-21grep10:34:403
4160,0ktimersoftd/00-21swapper/008:16:380
339960,0migration/328226-21sh10:06:273
339960,0migration/317672-21irqrtprio12:29:303
339960,0migration/310135-21sh11:48:203
316129964,0cyclictest3524-21snmpd11:44:112
316119960,0cyclictest0-21swapper/111:51:181
316119960,0cyclictest0-21swapper/111:17:051
316119960,0cyclictest0-21swapper/107:54:301
316109960,0cyclictest0-21swapper/012:44:580
316109960,0cyclictest0-21swapper/012:14:330
29805060,0irq/28-eth0-rx-6152-21ssh09:54:313
29805060,0irq/28-eth0-rx-0-21swapper/311:34:373
19160,0ktimersoftd/10-21swapper/111:09:501
149960,0migration/03988-21sh12:02:590
149960,0migration/024996-21sh11:38:340
149960,0migration/019778-21sh10:59:090
8305050,0irq/26-0000:00:9331-21cpuspeed_turbos09:39:253
8305050,0irq/26-0000:00:8744-21sed10:49:343
8305050,0irq/26-0000:00:8704-21iostat12:24:313
8305050,0irq/26-0000:00:8591-21cut09:19:293
8305050,0irq/26-0000:00:5205-21cut11:09:143
8305050,0irq/26-0000:00:4988-21kthreadcore12:39:303
8305050,0irq/26-0000:00:3858-21irqcore08:54:313
8305050,0irq/26-0000:00:31593-21aten_r1power_fr11:24:243
8305050,0irq/26-0000:00:28381-21gltestperf08:49:273
8305050,0irq/26-0000:00:27407-21cut11:39:313
8305050,0irq/26-0000:00:24263-21perl10:24:273
8305050,0irq/26-0000:00:23141-21aten_r1power_vo08:24:233
8305050,0irq/26-0000:00:20279-21netstat07:34:323
8305050,0irq/26-0000:00:19438-21ssh10:01:103
8305050,0irq/26-0000:00:1862-21tr12:19:323
8305050,0irq/26-0000:00:11761-21sensors08:34:333
8305050,0irq/26-0000:00:0-21swapper/311:59:303
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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