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2026-06-09 - 20:00
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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 09, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1480426453,0sleep20-21swapper/207:21:172
15184994848,0cyclictest28020-21md1_resync08:47:102
1494024645,0sleep10-21swapper/107:22:521
1506324230,0sleep00-21swapper/007:24:110
15183993535,0cyclictest191ktimersoftd/108:47:101
1502723227,0sleep30-21swapper/307:23:503
15184991313,0cyclictest83050irq/26-0000:00:11:01:402
15184991212,0cyclictest18202-21sadc11:44:482
151849988,0cyclictest83050irq/26-0000:00:10:34:102
339970,0migration/38517-21sh08:00:103
151849977,0cyclictest83050irq/26-0000:00:11:36:502
151849977,0cyclictest83050irq/26-0000:00:09:56:132
151829974,0cyclictest9391-21munin-run12:34:480
8305060,0irq/26-0000:00:29104-21tr07:55:063
8305060,0irq/26-0000:00:28877-21port_sshpriv09:20:083
8305060,0irq/26-0000:00:24245-21irqstats07:30:043
8305060,0irq/26-0000:00:18986-21munin-node10:50:032
8305060,0irq/26-0000:00:13346-21munin-node10:25:092
8305060,0irq/26-0000:00:12879-21df07:45:003
8305060,0irq/26-0000:00:10198-21python11:55:102
339960,0migration/39245-21irqcore09:10:043
339960,0migration/324328-21sh11:29:543
339960,0migration/321191-21sh10:14:313
339960,0migration/31846-21sh12:45:313
339960,0migration/318230-21latency_hist11:44:483
329960,0watchdog/34473-21cut12:50:033
29805060,0irq/28-eth0-rx-5184-21iostat_ios10:05:043
29805060,0irq/28-eth0-rx-3400-21kthreadcore11:15:073
27160,0ktimersoftd/20-21swapper/210:12:002
19160,0ktimersoftd/10-21swapper/112:44:121
19160,0ktimersoftd/10-21swapper/110:39:111
179960,0migration/117040-21sh12:36:301
151849966,0cyclictest83050irq/26-0000:00:11:52:162
151849966,0cyclictest83050irq/26-0000:00:09:31:512
151849966,0cyclictest3524-21snmpd12:27:402
151849966,0cyclictest0-21swapper/211:10:012
151849966,0cyclictest0-21swapper/211:10:012
151849965,0cyclictest0-21swapper/212:01:162
151849960,0cyclictest0-21swapper/208:09:492
151839966,0cyclictest0-21swapper/112:06:031
151839960,0cyclictest29783-21diskmemload10:54:571
151839960,0cyclictest0-21swapper/111:44:081
151829960,0cyclictest1999-21md0_raid112:46:100
151829960,0cyclictest0-21swapper/012:24:050
8305050,0irq/26-0000:00:8536-21ssh12:32:312
8305050,0irq/26-0000:00:5346-21ssh09:28:092
8305050,0irq/26-0000:00:4765-21perl10:05:012
8305050,0irq/26-0000:00:31852-21tr07:35:053
8305050,0irq/26-0000:00:31252-21yum11:30:172
8305050,0irq/26-0000:00:30437-21cpu11:15:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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