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2026-05-10 - 08:48
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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
Characteristics of the 50 highest latencies:
System rackcslot4.osadl.org (updated Sun May 10, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26240042276184,78sleep00-21swapper/019:09:330
26236412265205,46sleep10-21swapper/119:05:391
27402352700,5sleep00-21swapper/022:40:130
2624169995516,9cyclictest2706370-21latency_hist21:55:011
26857322540,4sleep1251rcuc/121:27:021
2624169995419,12cyclictest2699945-21cut21:45:201
179699540,3rtkit-daemon1795-21rtkit-daemon23:55:420
2624169995317,13cyclictest2817904-21apt-get00:25:151
2624169995317,10cyclictest2672020-21diskmemload23:00:231
2624169995316,12cyclictest2801282-21ntpq00:00:211
2624169995315,12cyclictest2683441-21sed21:25:011
2624169995315,11cyclictest2813869-21latency_hist00:20:011
2624169995216,14cyclictest2672979-21ls21:10:211
2624169995216,10cyclictest1-21systemd22:32:591
2624169995214,17cyclictest2639324-21grep19:45:211
2624169995214,11cyclictest26260942chrt19:15:011
179699520,3rtkit-daemon1795-21rtkit-daemon00:38:241
2624169995119,16cyclictest2744789-21/usr/sbin/munin22:45:241
2624169995118,11cyclictest2643251-21sh19:55:211
2624169995117,11cyclictest2672020-21diskmemload22:40:231
2624169995115,9cyclictest2796457-21sh23:55:001
2624169995115,14cyclictest2797802-21ls23:55:221
2624169995114,11cyclictest2710000-21/usr/sbin/munin22:00:011
2624169995019,14cyclictest2809157-21taskset00:11:441
2624169995018,10cyclictest2720236-21taskset22:12:531
2624169995016,9cyclictest1-21systemd23:50:011
2624169995016,10cyclictest2821998-21gltestperf00:30:171
2624169994917,12cyclictest2725267-21apt-get22:20:131
2624169994916,10cyclictest2672020-21diskmemload22:09:561
2624169994915,14cyclictest2666726-21expr20:55:191
2624169994915,11cyclictest2645393-21mailstats20:00:221
179699490,4rtkit-daemon1795-21rtkit-daemon22:36:290
2624169994819,9cyclictest2679611-21ssh21:19:311
2624169994819,9cyclictest2651982-21taskset20:19:271
2624169994818,9cyclictest2772168-21ssh23:22:411
2624169994818,9cyclictest2772168-21ssh23:22:401
2624169994818,9cyclictest2723082-21runrttasks22:15:551
2624169994818,10cyclictest2689741-21seq21:32:101
2624169994817,10cyclictest2672020-21diskmemload21:40:071
2624169994816,13cyclictest2660489-21sed20:40:181
2624169994816,13cyclictest2631627-21ps19:25:231
2624169994815,13cyclictest2759282-21grep23:05:201
2624169994815,13cyclictest2710939-21memory22:00:201
2624169994815,13cyclictest2648899-21grep20:10:181
2624169994815,13cyclictest2635486-21grep19:35:221
2624169994815,12cyclictest2767296-21sed23:15:251
2624169994815,12cyclictest2737007-21ssh22:35:181
2624169994815,11cyclictest2814407-21fschecks_time00:20:181
2624169994815,11cyclictest2804408-21grep00:05:171
2624169994815,11cyclictest2782342-21gzip23:35:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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