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2026-06-19 - 01:15
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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 Thu Jun 18, 2026 12:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9297219470,18sleep30-21swapper/306:54:093
990321094,20sleep29958-21wc06:54:342
106389910357,8cyclictest181rcu_preempt07:14:131
106389910357,8cyclictest181rcu_preempt07:14:131
93132998,65sleep19319-21/usr/sbin/munin06:54:121
245522980,6sleep20-21swapper/207:39:162
10634999619,41cyclictest26874-21ssh09:12:520
10634999619,41cyclictest26874-21ssh09:12:520
10638999468,9cyclictest181rcu_preempt09:14:171
10638999461,8cyclictest181rcu_preempt08:04:051
10638999254,8cyclictest181rcu_preempt07:39:171
10634999271,15cyclictest5884-21sh10:25:200
10634999271,15cyclictest5884-21sh10:25:200
10638998837,11cyclictest0-21swapper/107:21:541
10638998837,11cyclictest0-21swapper/107:21:541
10634998817,46cyclictest0-21swapper/008:50:290
10644998760,18cyclictest31438-21gpgv11:08:542
10644998748,9cyclictest181rcu_preempt10:19:002
10638998667,10cyclictest31817-21ssh12:03:121
10638998655,11cyclictest181rcu_preempt10:44:211
10634998667,13cyclictest18002-21diskmemload10:04:230
10644998557,22cyclictest12155-21fschecks_time12:24:092
10638998555,8cyclictest181rcu_preempt11:04:031
10638998549,18cyclictest181rcu_preempt10:19:241
10638998548,12cyclictest181rcu_preempt07:49:251
10634998554,10cyclictest0-21swapper/012:19:250
10634998526,19cyclictest1592-21latency_hist08:08:510
1063499851,39cyclictest0-21swapper/007:48:520
10638998443,17cyclictest181rcu_preempt08:35:101
1063499849,23cyclictest7019-21users12:14:280
10634998410,36cyclictest22403-21users09:04:280
10638998347,7cyclictest181rcu_preempt11:14:231
10638998347,7cyclictest181rcu_preempt11:14:231
10638998324,13cyclictest0-21swapper/108:13:481
10634998363,14cyclictest16468-21latency_hist10:43:510
10644998251,9cyclictest181rcu_preempt07:34:042
10638998253,8cyclictest181rcu_preempt07:13:511
10638998253,8cyclictest181rcu_preempt07:13:511
10634998264,12cyclictest14579-21sendmail12:28:490
1063499824,36cyclictest20071-21tune2fs10:49:110
1064499818,47cyclictest18002-21diskmemload11:09:062
10644998154,18cyclictest15483-21sh11:34:262
10638998151,8cyclictest181rcu_preempt11:24:111
10638998151,8cyclictest181rcu_preempt11:24:111
10638998143,9cyclictest181rcu_preempt07:59:351
10638998141,10cyclictest181rcu_preempt12:24:081
10638998136,9cyclictest0-21swapper/107:48:531
10634998160,15cyclictest300-21rs:main0
10634998160,13cyclictest32348-21ssh12:04:000
10634998157,18cyclictest8896-21open_inodes08:29:200
1063499812,58cyclictest11832-21/usr/sbin/munin11:29:130
10638998048,7cyclictest181rcu_preempt12:17:581
10634998058,15cyclictest300-21rs:main0
10634998025,32cyclictest5612-21ssh12:13:490
10634998016,15cyclictest10077-21ssh09:39:050
10644997965,10cyclictest10624-21cyclictest07:04:292
1064499793,38cyclictest19226-21df09:54:082
1064499793,38cyclictest19226-21df09:54:082
1064499792,53cyclictest23993-21apt-get09:09:082
1064499792,53cyclictest23993-21apt-get09:09:082
1064499792,50cyclictest9839-21grep08:33:532
1063899795,42cyclictest31-21ksoftirqd/110:25:141
1063899795,42cyclictest31-21ksoftirqd/110:25:141
10638997946,12cyclictest181rcu_preempt07:08:531
10638997941,9cyclictest0-21swapper/110:54:231
1063499795,33cyclictest20193-21/usr/sbin/munin07:24:260
1063499793,44cyclictest19177-21switchtime08:59:240
10634997920,19cyclictest22008-21/usr/sbin/munin09:59:080
10634997919,39cyclictest31138-21ssh09:19:190
10634997913,9cyclictest4840-21munin-run08:18:490
10634997913,30cyclictest8032-21unixbench_multi09:34:240
1064499787,44cyclictest58-21kcompactd007:54:512
1064499787,44cyclictest58-21kcompactd007:54:512
10644997854,15cyclictest2374-21systemd-journal10:35:002
10644997843,12cyclictest181rcu_preempt09:53:492
10644997838,14cyclictest181rcu_preempt10:54:152
1064499782,48cyclictest425-21tune2fs08:04:102
1064499782,39cyclictest3399-21latency12:09:132
10638997849,9cyclictest18002-21diskmemload10:03:301
10638997848,8cyclictest181rcu_preempt08:39:221
10638997847,9cyclictest4456-21ssh12:10:371
10634997857,15cyclictest16752-21ssh11:37:530
1063499783,41cyclictest12998-21latency_hist08:43:520
10634997821,14cyclictest27019-21sh11:54:190
10644997757,8cyclictest181rcu_preempt07:49:062
10644997750,10cyclictest181rcu_preempt11:48:592
10644997750,10cyclictest181rcu_preempt11:48:592
10644997745,23cyclictest25954-21cut07:44:112
10638997760,10cyclictest6249-21kworker/u17:3-rpciod09:50:341
10638997753,10cyclictest181rcu_preempt11:03:051
10638997753,10cyclictest181rcu_preempt11:03:051
10638997752,8cyclictest181rcu_preempt07:24:101
1063899772,45cyclictest31-21ksoftirqd/111:38:121
10634997760,11cyclictest15312-21timerwakeupswit07:09:240
10634997760,11cyclictest15312-21timerwakeupswit07:09:240
10634997759,11cyclictest58-21kcompactd007:39:070
10634997758,13cyclictest30574-21cron07:58:490
10634997758,13cyclictest30574-21cron07:58:490
10634997757,14cyclictest29200-21sshd09:16:000
10634997756,13cyclictest8625-21diskmemload11:24:090
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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