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2025-12-10 - 21:53
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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 Wed Dec 10, 2025 12:44:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2477421090,8sleep30-21swapper/309:43:483
398121020,7sleep00-21swapper/011:10:040
3028321006,15sleep20-21swapper/207:06:342
30561999971,15cyclictest0-21swapper/011:03:400
30581999465,21cyclictest8869-21ntp_kernel_err09:13:402
30581999465,21cyclictest8869-21ntp_kernel_err09:13:402
3056199917,72cyclictest7113-21apt-get10:13:280
30571998862,19cyclictest18588-21latency_hist09:33:431
30581998753,11cyclictest181rcu_preempt07:28:152
3058199873,23cyclictest39-21ksoftirqd/209:58:302
30581998715,45cyclictest39-21ksoftirqd/212:10:492
30561998751,11cyclictest181rcu_preempt12:33:320
30581998568,12cyclictest26417-21latency_hist11:53:112
3056199856,66cyclictest15120-21apt-get07:58:270
30561998554,10cyclictest181rcu_preempt10:33:260
30561998552,13cyclictest181rcu_preempt09:28:250
30581998463,14cyclictest6263-21unixbench_singl11:13:502
30581998414,44cyclictest39-21ksoftirqd/207:37:262
30581998360,15cyclictest29285-21ssh11:58:132
30581998351,7cyclictest181rcu_preempt12:23:472
30581998315,45cyclictest39-21ksoftirqd/210:56:512
30581998313,44cyclictest39-21ksoftirqd/209:24:042
30581998312,45cyclictest39-21ksoftirqd/207:45:402
30581998242,23cyclictest17261-21ssh10:33:132
30581998237,12cyclictest18790-21ssh11:38:272
30581998237,12cyclictest18790-21ssh11:38:272
3057199822,66cyclictest2024-21apt-get08:58:241
30561998257,17cyclictest14626-21ssh12:30:360
30561998257,17cyclictest14626-21ssh12:30:360
30561998256,17cyclictest5518-21diskmemload09:53:340
2943728211,41sleep30-21swapper/307:03:423
30581998159,8cyclictest181rcu_preempt11:01:032
30581998157,11cyclictest181rcu_preempt10:38:362
30571998137,35cyclictest27080-21modprobe10:53:091
3057199813,61cyclictest24547-21apt-get08:28:251
3057199812,61cyclictest31998-21apt-get11:03:241
30561998156,16cyclictest7777-21fschecks_count12:18:310
30561998156,16cyclictest5518-21diskmemload10:48:410
3042628112,43sleep030434-21munin-run07:08:110
30581998050,9cyclictest181rcu_preempt12:18:562
30581998048,9cyclictest181rcu_preempt08:38:492
30581998014,35cyclictest39-21ksoftirqd/209:10:552
30561998054,9cyclictest0-21swapper/010:08:320
30561998054,9cyclictest0-21swapper/010:08:320
3056199802,38cyclictest742-21latency07:13:380
30581997937,20cyclictest32600-21timerwakeupswit07:13:202
30581997914,38cyclictest39-21ksoftirqd/208:04:562
30581997914,38cyclictest39-21ksoftirqd/208:04:562
30561997923,28cyclictest4857-21sort12:13:280
30581997827,13cyclictest0-21swapper/210:33:162
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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