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2026-07-31 - 13:26
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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 Fri Jul 31, 2026 00:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81429913659,10cyclictest0-21swapper/022:40:580
81479912579,38cyclictest0-21swapper/121:56:281
962121170,20sleep1291rcuc/121:40:581
81479910755,46cyclictest22692-21ssh22:01:301
7987210513,60sleep18011-21munin-run18:55:551
795521056,15sleep00-21swapper/018:55:290
81429910381,16cyclictest26241-21latency_hist19:50:590
814799972,27cyclictest29693-21apt20:00:551
8147999648,41cyclictest4710-21ls21:31:311
8142999674,13cyclictest2374-21systemd-journal22:15:060
8155999375,9cyclictest0-21swapper/200:25:562
8142999377,10cyclictest16441-21ssh20:56:400
814799913,30cyclictest9864-21cpuspeed21:41:121
814799912,41cyclictest19911-21sed23:46:211
814799912,35cyclictest7853-21ntpq22:31:241
8147999024,50cyclictest0-21swapper/122:21:051
8147999024,50cyclictest0-21swapper/122:21:051
8142999063,8cyclictest181rcu_preempt19:31:280
8142999058,9cyclictest181rcu_preempt20:00:570
8155998952,27cyclictest27293-21kworker/u19:1+nfsiod22:26:162
8147998952,30cyclictest30126-21kworker/u17:3-xprtiod23:21:301
8147998952,30cyclictest30126-21kworker/u17:3-xprtiod23:21:301
814799893,53cyclictest28564-21apt-get00:01:101
814799893,36cyclictest352-21runrttasks22:08:051
814799884,27cyclictest2861-21head00:11:341
814799883,26cyclictest24423-21ssh23:54:101
8142998760,15cyclictest0-21swapper/022:06:300
8147998659,18cyclictest758-21ssh22:20:141
814799863,36cyclictest26682-21latency_hist19:51:001
814799862,42cyclictest8125-21if_eth000:21:191
814799862,38cyclictest1272-21munin-run23:15:541
8142998666,14cyclictest24572-21sh23:00:170
8142998666,14cyclictest24572-21sh23:00:170
8142998633,12cyclictest181rcu_preempt22:46:150
8155998557,20cyclictest18765-21kernelversion21:01:242
8155998557,20cyclictest18765-21kernelversion21:01:242
8147998558,19cyclictest15571-21kernelversion19:16:221
814799853,37cyclictest28821-21ssh21:17:381
814799853,37cyclictest12109-21grep20:46:121
814799853,36cyclictest30226-21fschecks_time20:01:171
814799853,36cyclictest30226-21fschecks_time20:01:171
814799853,36cyclictest17297-21ntp_kernel_err19:21:231
814799853,26cyclictest8540-21modprobe20:35:551
8147998519,44cyclictest10812-21seq19:01:241
8147998515,28cyclictest21542-21seq22:55:061
8147998513,31cyclictest1568-21sort00:10:571
8147998513,31cyclictest1568-21sort00:10:571
8155998462,11cyclictest0-21swapper/218:56:222
8155998450,20cyclictest25949-21kworker/u17:3-xprtiod20:59:092
814799843,28cyclictest1475-21switchtime20:11:291
8147998430,43cyclictest0-21swapper/121:06:501
814799842,40cyclictest5099-21/usr/sbin/munin22:26:291
814299845,24cyclictest18924-21apt-get21:56:280
8155998358,18cyclictest8129-21cyclictest22:31:182
814799833,34cyclictest9517-21switchtime20:36:281
814799833,34cyclictest9517-21switchtime20:36:281
814799833,30cyclictest13871-21cut20:51:151
814799833,30cyclictest13871-21cut20:51:151
8142998352,24cyclictest0-21swapper/023:01:310
814799829,30cyclictest855-21/usr/sbin/munin21:26:321
814799824,34cyclictest28147-21apt-key00:00:581
814799823,37cyclictest15320-21/usr/sbin/munin20:56:381
814799823,37cyclictest11397-21unixbench_singl20:41:331
814799823,36cyclictest9781-21cat19:00:581
814799823,36cyclictest18049-21ssh23:42:591
814799823,29cyclictest13086-21grep21:46:191
814799823,24cyclictest24078-21chrt19:41:321
8147998227,47cyclictest0-21swapper/123:39:391
8142998260,8cyclictest181rcu_preempt22:51:150
8142998260,15cyclictest10628-21latency_hist00:25:570
8155998166,10cyclictest8129-21cyclictest23:00:162
8155998166,10cyclictest8129-21cyclictest23:00:162
8155998165,9cyclictest0-21swapper/223:46:302
8155998148,24cyclictest7543-21cat00:20:572
8155998140,12cyclictest181rcu_preempt20:11:302
8155998137,14cyclictest181rcu_preempt19:46:232
8155998130,11cyclictest181rcu_preempt22:46:142
814799813,38cyclictest19025-21processes21:01:311
814799813,38cyclictest19025-21processes21:01:311
814799813,33cyclictest12387-21latency19:06:201
814799813,28cyclictest1-21systemd21:25:561
814799813,27cyclictest14230-21grep22:41:331
814799813,26cyclictest4698-21switchtime20:21:291
814799813,25cyclictest3694-21latency_hist20:20:581
814799812,26cyclictest18810-21apt-key21:55:591
814799812,25cyclictest11197-21sort22:36:311
8142998163,9cyclictest0-21swapper/021:36:330
8142998138,13cyclictest27293-21kworker/u19:1-rpciod23:06:220
8142998138,13cyclictest27293-21kworker/u19:1-rpciod23:06:220
8142998133,10cyclictest0-21swapper/021:35:540
8155998064,9cyclictest0-21swapper/221:16:342
814799803,38cyclictest1776-21df_inode23:16:141
814799803,36cyclictest7767-21fschecks_count23:26:171
814799803,29cyclictest16533-21fschecks_time22:46:211
8147998027,44cyclictest0-21swapper/122:56:181
8147998027,44cyclictest0-21swapper/122:56:181
8142998062,12cyclictest10834-21fschecks_time23:31:170
8142998060,9cyclictest0-21swapper/021:41:290
8142998057,16cyclictest1099-21latency_hist22:20:570
8142998047,15cyclictest181rcu_preempt19:51:340
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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