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2025-12-08 - 22:48
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack0slot2.osadl.org (updated Mon Dec 08, 2025 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
229160126151,7sleep40-21swapper/415:22:124
229157625747,7sleep60-21swapper/615:21:506
2291930995553,2cyclictest2749386-21kworker/u16:5+events_unbound19:22:535
229158425545,7sleep50-21swapper/515:21:575
2291930995250,2cyclictest2788357-21kworker/u16:0+events_unbound20:22:555
229143024815,29sleep70-21swapper/715:19:517
2291937994539,5cyclictest2608396-21latency_hist17:57:277
2291937994140,0cyclictest0-21swapper/718:24:377
2291937994039,0cyclictest0-21swapper/716:12:307
2291935994037,2cyclictest2657801-21kworker/u16:1+flush-8:018:32:296
2291930993836,2cyclictest2739716-21kworker/u16:1+flush-8:019:08:385
2291937993734,2cyclictest2315963-21munin-run15:32:287
2291935993735,2cyclictest2291457-21kworker/u16:1+flush-8:015:42:516
2291930993735,2cyclictest2597357-21kworker/u16:3+flush-8:017:48:375
2291937993629,5cyclictest589235-21systemd-journal20:12:267
2291935993634,2cyclictest2577830-21kworker/u16:0+events_unbound18:44:396
2291930993634,2cyclictest2788357-21kworker/u16:0+events_unbound20:09:245
2291937993534,0cyclictest0-21swapper/720:41:397
2291937993534,0cyclictest0-21swapper/718:51:377
2291937993534,0cyclictest0-21swapper/717:35:387
2291937993534,0cyclictest0-21swapper/717:30:377
2291935993533,2cyclictest2788357-21kworker/u16:0+flush-8:020:22:516
2291935993533,2cyclictest2788357-21kworker/u16:0+events_unbound19:59:146
2291935993533,2cyclictest2291457-21kworker/u16:1+events_unbound15:24:266
2291930993533,2cyclictest2873240-21kworker/u16:3+flush-8:020:14:455
2291930993533,2cyclictest2395908-21kworker/u16:4+flush-8:016:40:065
2291926993532,2cyclictest2860717-21kworker/u16:1+events_unbound20:32:454
2291937993433,0cyclictest0-21swapper/719:54:397
2291935993432,2cyclictest2476894-21kworker/u16:2+events_unbound17:39:426
2291935993432,2cyclictest2261613-21kworker/u16:2+flush-8:015:57:386
2291930993432,2cyclictest2749386-21kworker/u16:5+flush-8:020:03:395
2291930993432,2cyclictest2749386-21kworker/u16:5+events_unbound19:22:225
2291930993432,2cyclictest2395908-21kworker/u16:4+flush-8:016:57:385
2291935993331,2cyclictest2688166-21kworker/u16:3+events_unbound19:01:376
2291930993331,2cyclictest2788357-21kworker/u16:0+flush-8:019:42:575
2291930993331,2cyclictest2788357-21kworker/u16:0+events_unbound19:36:405
2291930993331,2cyclictest2577830-21kworker/u16:0+events_unbound18:24:455
2291930993331,1cyclictest2588225-21kworker/u16:1+flush-8:017:57:425
2291937993231,0cyclictest0-21swapper/715:32:387
2291937993230,1cyclictest0-21swapper/718:00:537
2291935993230,2cyclictest2749386-21kworker/u16:5+events_unbound20:33:426
2291930993230,2cyclictest2476917-21kworker/u16:3+events_unbound17:36:405
2291930993230,2cyclictest2476894-21kworker/u16:2+flush-8:017:08:065
2291930993230,2cyclictest2281397-21kworker/u16:0+flush-8:015:49:465
2291930993230,2cyclictest2261613-21kworker/u16:2+events_unbound15:37:265
2291937993131,0cyclictest0-21swapper/718:54:377
2291937993130,0cyclictest0-21swapper/719:33:407
2291935993129,2cyclictest2920801-21kworker/u16:2+flush-8:020:31:366
2291935993129,2cyclictest2739716-21kworker/u16:1+flush-8:019:06:226
2291935993129,2cyclictest2688166-21kworker/u16:3+events_unbound19:14:456
2291935993129,2cyclictest2577830-21kworker/u16:0+events_unbound18:49:226
2291935993129,2cyclictest2546953-21kworker/u16:5+events_unbound17:54:456
2291935993129,2cyclictest2291457-21kworker/u16:1+events_unbound16:31:436
2291930993129,2cyclictest2577830-21kworker/u16:0+events_unbound18:30:335
2291930993129,2cyclictest2546953-21kworker/u16:5+events_unbound18:17:415
2291930993129,2cyclictest2546953-21kworker/u16:5+events_unbound17:44:295
2291930993129,2cyclictest2476917-21kworker/u16:3+events_unbound16:55:425
2291937993029,0cyclictest0-21swapper/719:46:407
2291937993029,0cyclictest0-21swapper/719:16:407
2291935993028,2cyclictest2657801-21kworker/u16:1+flush-8:018:31:456
2291935993028,2cyclictest2546953-21kworker/u16:5+flush-8:018:02:386
2291935993028,2cyclictest2546953-21kworker/u16:5+events_unbound18:14:416
2291935993028,2cyclictest2291457-21kworker/u16:1+events_unbound15:56:586
2291935993028,2cyclictest2291457-21kworker/u16:1+events_unbound15:56:586
2291935993027,2cyclictest2788357-21kworker/u16:0+events_unbound19:27:276
2291930993029,1cyclictest2395908-21kworker/u16:4+flush-8:016:28:505
2291930993028,2cyclictest2920801-21kworker/u16:2+flush-8:020:37:095
2291930993028,2cyclictest2873240-21kworker/u16:3+flush-8:020:20:255
2291930993028,2cyclictest2800067-21kworker/u16:2+events_unbound19:55:025
2291930993028,2cyclictest2800067-21kworker/u16:2+events_unbound19:51:295
2291930993028,2cyclictest2749386-21kworker/u16:5+events_unbound20:41:135
2291930993028,2cyclictest2710169-21kworker/u16:4+events_unbound18:58:375
2291930993028,2cyclictest2688166-21kworker/u16:3+events_unbound19:16:305
2291930993028,2cyclictest2395908-21kworker/u16:4+flush-8:016:14:345
2291930993028,2cyclictest2291457-21kworker/u16:1+flush-8:015:46:055
2291930993028,2cyclictest2261613-21kworker/u16:2+flush-8:015:58:335
2291937992928,0cyclictest0-21swapper/719:29:367
2291937992928,0cyclictest0-21swapper/717:07:187
2291937992923,5cyclictest589235-21systemd-journal15:49:257
2291937992923,5cyclictest2598275-21latency_hist17:52:287
2291935992927,2cyclictest2739716-21kworker/u16:1+events_unbound19:25:266
2291935992927,2cyclictest2597357-21kworker/u16:3+flush-8:017:49:426
2291935992927,2cyclictest2476894-21kworker/u16:2+events_unbound17:03:376
2291935992927,2cyclictest2395908-21kworker/u16:4+flush-8:017:07:546
2291935992927,2cyclictest2395908-21kworker/u16:4+events_unbound16:54:456
2291935992927,2cyclictest2346318-21kworker/u16:4+flush-8:015:48:346
2291935992926,2cyclictest2546953-21kworker/u16:5+flush-8:017:26:426
2291935992926,2cyclictest2546953-21kworker/u16:5+flush-8:017:26:426
2291930992927,2cyclictest2788357-21kworker/u16:0+flush-8:020:01:085
2291930992927,2cyclictest2710169-21kworker/u16:4+events_unbound18:52:065
2291930992927,2cyclictest2688166-21kworker/u16:3+events_unbound19:30:345
2291930992927,2cyclictest2688166-21kworker/u16:3+events_unbound18:35:415
2291930992927,2cyclictest2657801-21kworker/u16:1+events_unbound18:46:055
2291930992927,2cyclictest2577830-21kworker/u16:0+events_unbound17:55:345
2291930992927,2cyclictest2291457-21kworker/u16:1+events_unbound16:44:305
2291930992927,2cyclictest2291457-21kworker/u16:1+events_unbound15:26:115
2291937992828,0cyclictest0-21swapper/716:30:377
2291935992826,2cyclictest2800067-21kworker/u16:2+flush-8:019:56:306
2291935992826,2cyclictest2788357-21kworker/u16:0+events_unbound19:42:556
2291935992826,2cyclictest2749386-21kworker/u16:5+events_unbound19:11:336
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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