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2026-09-10 - 01:57
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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 rackbslot7.osadl.org (updated Wed Sep 09, 2026 12:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22797216914,106sleep222855-21fschecks_time07:05:002
24225999974,14cyclictest0-21swapper/207:34:372
238322996,75sleep00-21swapper/007:08:040
24225999876,16cyclictest28294-21apt-key07:19:372
24225999875,16cyclictest24171-21cyclictest12:15:262
24225999875,16cyclictest24171-21cyclictest12:15:262
24180999775,15cyclictest24171-21cyclictest08:59:570
24180999775,15cyclictest24171-21cyclictest08:59:570
24225999644,38cyclictest12753-21sh12:10:172
24225999570,14cyclictest0-21swapper/209:25:232
24225999556,15cyclictest30270-21ssh11:45:052
24225999556,15cyclictest30270-21ssh11:45:052
24180999570,17cyclictest23526-21latency_hist08:44:360
2418099953,72cyclictest8883-21ssh09:24:520
24180999456,13cyclictest181rcu_preempt09:10:050
24180999456,13cyclictest181rcu_preempt09:10:050
24180999456,10cyclictest181rcu_preempt07:19:590
24202999272,13cyclictest15215-21munin-plugin-st12:14:331
2418099923,63cyclictest26882-21cpu07:15:280
24180999170,8cyclictest181rcu_preempt12:30:020
24180999169,15cyclictest24171-21cyclictest12:05:110
24180999169,15cyclictest24171-21cyclictest12:05:110
24225998971,10cyclictest0-21swapper/211:34:572
24225998971,10cyclictest0-21swapper/211:34:572
24225998965,17cyclictest24171-21cyclictest11:55:072
24225998965,14cyclictest0-21swapper/208:40:082
24180998940,11cyclictest181rcu_preempt12:12:240
24225998866,12cyclictest0-21swapper/208:59:382
24225998863,16cyclictest31532-21diskmemload10:43:202
24202998861,20cyclictest30725-21latency_hist12:39:361
24202998825,29cyclictest9055-21seq11:10:061
24180998856,12cyclictest181rcu_preempt11:42:390
24180998848,29cyclictest0-21swapper/010:19:550
24180998848,29cyclictest0-21swapper/010:19:550
24202998724,28cyclictest6030-21seq11:05:041
24202998724,28cyclictest6030-21seq11:05:041
24180998765,16cyclictest26899-21latency_hist09:54:380
24180998765,16cyclictest26899-21latency_hist09:54:380
24180998763,18cyclictest5329-21latency_hist09:19:360
24225998670,9cyclictest0-21swapper/209:24:372
24202998628,45cyclictest0-21swapper/112:04:481
24202998628,45cyclictest0-21swapper/112:04:481
24202998620,29cyclictest27256-21runrttasks11:40:061
24180998664,14cyclictest14646-21munin-run09:34:340
2418099863,61cyclictest24532-21runrttasks07:09:550
24225998555,9cyclictest9706-21ssh10:18:492
24225998545,19cyclictest181rcu_preempt09:48:402
24202998565,13cyclictest3073-21ssh11:54:361
24180998565,11cyclictest0-21swapper/011:56:200
24180998564,14cyclictest31532-21diskmemload11:25:060
24180998564,14cyclictest31532-21diskmemload11:25:060
24180998549,15cyclictest181rcu_preempt11:32:010
24225998462,12cyclictest0-21swapper/212:34:372
24225998462,12cyclictest0-21swapper/210:30:112
24202998466,10cyclictest0-21swapper/110:34:471
24202998418,28cyclictest0-21swapper/110:30:061
24202998410,26cyclictest0-21swapper/112:00:061
24180998463,8cyclictest181rcu_preempt11:39:210
24180998463,8cyclictest181rcu_preempt11:39:210
24225998365,14cyclictest24171-21cyclictest09:55:402
24225998362,12cyclictest24171-21cyclictest09:14:492
24225998330,9cyclictest181rcu_preempt07:44:562
2420299837,35cyclictest0-21swapper/111:31:181
24202998367,9cyclictest0-21swapper/108:44:351
24180998364,12cyclictest0-21swapper/010:45:100
24180998359,14cyclictest31532-21diskmemload10:15:030
24180998355,7cyclictest181rcu_preempt10:32:480
2308228317,36sleep10-21swapper/107:05:071
24225998261,11cyclictest0-21swapper/210:59:582
24202998221,29cyclictest16024-21head09:35:111
24180998262,13cyclictest0-21swapper/008:29:360
24180998261,10cyclictest0-21swapper/007:44:560
24225998152,8cyclictest181rcu_preempt07:39:352
24225998152,8cyclictest181rcu_preempt07:39:352
24225998150,9cyclictest11936-21ssh12:09:222
24225998150,9cyclictest11936-21ssh12:09:222
24225998146,14cyclictest10054-21ssh11:11:382
24225998139,18cyclictest11773-21kworker/u17:2+xprtiod09:10:222
24225998139,18cyclictest11773-21kworker/u17:2+xprtiod09:10:222
24225998127,11cyclictest181rcu_preempt07:14:382
24202998160,14cyclictest343-21runrttasks07:10:211
24202998159,14cyclictest15297-21kworker/u17:0-ext4-rsv-conversion10:29:371
24202998158,17cyclictest2315-21latency_hist09:14:371
24202998158,17cyclictest2315-21latency_hist09:14:371
2420299813,68cyclictest8993-21ssh09:25:091
24202998119,20cyclictest31532-21diskmemload09:20:281
24180998163,12cyclictest526-21rs:main0
24180998163,12cyclictest526-21rs:main0
24180998160,14cyclictest30663-21kernelversion07:24:590
24180998156,13cyclictest0-21swapper/008:49:560
24225998060,14cyclictest200-21systemd-journal10:08:012
24202998060,13cyclictest16523-21kworker/u17:2-rpciod10:39:581
2420299803,62cyclictest26832-21runrttasks07:15:071
24202998022,22cyclictest30196-21ntp_kernel_err11:45:021
24202998022,22cyclictest30196-21ntp_kernel_err11:45:021
24180998064,11cyclictest200-21systemd-journal12:03:010
24180998048,8cyclictest181rcu_preempt11:46:290
24180998048,8cyclictest181rcu_preempt11:46:290
24180998039,10cyclictest0-21swapper/009:35:370
24180998038,12cyclictest181rcu_preempt09:59:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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