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2026-06-23 - 14:06
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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 rackbslot7.osadl.org (updated Tue Jun 23, 2026 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27597216110,110sleep127668-21fschecks_time18:53:581
275762968,59sleep227582-21diskstats18:53:552
2890099922,32cyclictest13997-21apt-get23:58:530
28900999166,8cyclictest181rcu_preempt00:18:570
28900999138,30cyclictest22682-21munin-run23:18:300
28900998957,12cyclictest181rcu_preempt21:39:520
28900998947,11cyclictest181rcu_preempt22:44:370
28900998947,11cyclictest181rcu_preempt22:44:370
2890099878,46cyclictest15-21ksoftirqd/020:26:270
59472860,5sleep20-21swapper/222:49:072
2891999865,43cyclictest39-21ksoftirqd/219:18:482
2890099867,48cyclictest15-21ksoftirqd/019:46:170
28900998657,20cyclictest6274-21diskmemload23:44:190
28900998648,7cyclictest181rcu_preempt22:11:010
28900998648,7cyclictest181rcu_preempt22:11:010
28900998645,11cyclictest181rcu_preempt21:33:510
28919998568,8cyclictest0-21swapper/220:03:472
28900998558,9cyclictest181rcu_preempt23:53:510
28912998464,14cyclictest24366-21sendmail_mailqu00:14:041
28912998464,14cyclictest24366-21sendmail_mailqu00:14:041
28912998451,25cyclictest352-21runrttasks20:58:441
28919998354,7cyclictest181rcu_preempt22:14:002
28919998354,7cyclictest181rcu_preempt22:14:002
28919998353,8cyclictest181rcu_preempt22:28:162
28919998342,10cyclictest181rcu_preempt00:22:322
28919998316,35cyclictest39-21ksoftirqd/222:10:342
28919998316,35cyclictest39-21ksoftirqd/222:10:342
28912998362,15cyclictest11379-21cpu23:53:471
28900998365,7cyclictest181rcu_preempt22:24:050
28900998356,7cyclictest181rcu_preempt00:14:340
28900998356,7cyclictest181rcu_preempt00:14:340
28900998348,12cyclictest29422-21ssh22:34:060
28900998348,12cyclictest29422-21ssh22:34:060
28900998347,9cyclictest181rcu_preempt22:17:480
28900998347,9cyclictest181rcu_preempt22:17:480
28900998345,13cyclictest181rcu_preempt21:02:080
28900998314,51cyclictest10693-21ssh22:03:450
28900998314,51cyclictest10693-21ssh22:03:450
105002830,3sleep0211rcuc/022:03:360
28919998268,8cyclictest0-21swapper/220:14:042
28919998268,8cyclictest0-21swapper/220:14:042
28919998259,8cyclictest181rcu_preempt21:54:102
28919998212,40cyclictest39-21ksoftirqd/200:09:232
28912998266,10cyclictest19348-21kworker/u17:0-rpciod23:44:211
28900998262,11cyclictest0-21swapper/020:19:060
28919998135,12cyclictest181rcu_preempt19:49:542
28900998156,16cyclictest14385-21unixbench_singl19:49:100
28919998053,8cyclictest181rcu_preempt21:26:102
28919998050,15cyclictest181rcu_preempt20:23:332
28919998035,22cyclictest8243-21ssh21:04:432
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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