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2026-07-28 - 21:15
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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 Tue Jul 28, 2026 12:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2789921379,100sleep00-21swapper/006:51:320
29220991323,87cyclictest3157-21apt-get11:36:241
29220991323,87cyclictest3157-21apt-get11:36:241
292209912010,94cyclictest21245-21apt-get12:06:201
292209910813,88cyclictest8417-21ls09:57:201
27901210610,66sleep127929-21fschecks_count06:51:331
29226999563,11cyclictest181rcu_preempt07:41:342
2808629319,40sleep20-21swapper/206:51:382
2922099907,61cyclictest13608-21apt-get10:06:201
2922099907,61cyclictest13608-21apt-get10:06:201
29220999064,7cyclictest181rcu_preempt11:56:181
29226998961,19cyclictest2737-21apt-config11:36:072
29226998961,19cyclictest2737-21apt-config11:36:072
29208998854,28cyclictest29137-21sendmail11:26:050
29208998854,28cyclictest29137-21sendmail11:26:050
29226998639,34cyclictest6767-21kworker/u19:1+nfsiod11:44:172
2922099868,17cyclictest31-21ksoftirqd/112:21:221
2922099862,43cyclictest22490-21fschecks_time09:26:271
29226998565,8cyclictest181rcu_preempt09:32:312
29226998538,12cyclictest28987-21ssh10:31:082
29226998454,20cyclictest0-21swapper/209:56:392
29226998449,10cyclictest181rcu_preempt07:01:152
29226998446,12cyclictest29195-21cyclictest09:52:042
29226998446,12cyclictest29195-21cyclictest09:52:042
2922099847,66cyclictest24242-21kworker/u18:1+flush-179:007:11:331
2920899843,34cyclictest15-21ksoftirqd/012:05:160
29226998350,7cyclictest181rcu_preempt11:37:022
29226998350,7cyclictest181rcu_preempt11:37:022
29226998341,11cyclictest24242-21kworker/u18:1-rpciod09:11:372
29220998341,9cyclictest181rcu_preempt09:16:261
29208998366,11cyclictest315-21idleruntime-cro07:06:050
29226998266,10cyclictest31137-21rm09:41:142
29226998266,10cyclictest31137-21rm09:41:142
29226998163,13cyclictest5630-21latency_hist07:21:092
2922699812,42cyclictest39-21ksoftirqd/211:21:222
2922699812,42cyclictest39-21ksoftirqd/211:21:222
2920899819,46cyclictest15-21ksoftirqd/007:16:390
29208998111,39cyclictest16837-21/usr/sbin/munin09:16:370
29226998059,15cyclictest29947-21ssh12:21:072
29226998049,10cyclictest181rcu_preempt10:02:432
29226998045,28cyclictest24035-21kworker/u19:2+nfsiod11:31:072
29226998044,17cyclictest0-21swapper/210:46:262
29226998040,10cyclictest58-21kcompactd010:14:102
2922699803,39cyclictest39-21ksoftirqd/209:04:012
2922699803,39cyclictest39-21ksoftirqd/209:04:012
29226998032,14cyclictest0-21swapper/211:51:312
29226998032,14cyclictest0-21swapper/211:51:312
29220998050,11cyclictest181rcu_preempt10:27:501
2920899808,44cyclictest15-21ksoftirqd/007:40:190
2920899808,44cyclictest15-21ksoftirqd/007:40:190
29208998012,39cyclictest15-21ksoftirqd/010:51:360
29208998012,39cyclictest15-21ksoftirqd/010:51:360
14032800,8sleep01405-21munin-run09:46:050
14032800,8sleep01405-21munin-run09:46:050
29226997963,10cyclictest277-21dbus-daemon07:11:072
29226997963,10cyclictest277-21dbus-daemon07:11:072
29226997957,15cyclictest15555-21fschecks_count07:51:272
29226997950,8cyclictest181rcu_preempt09:50:172
29226997950,10cyclictest181rcu_preempt12:10:192
29226997936,9cyclictest14874-21sshd07:48:222
29208997963,12cyclictest27183-21kworker/u19:1-nfsiod10:16:380
2920899793,37cyclictest15-21ksoftirqd/012:19:390
29226997863,9cyclictest3882-21diskmemload11:20:242
29226997858,15cyclictest11269-21threads07:36:412
29226997858,15cyclictest11269-21threads07:36:412
29226997856,9cyclictest181rcu_preempt10:55:212
29226997856,9cyclictest181rcu_preempt10:55:212
29226997854,16cyclictest17236-21unixbench_singl09:16:422
2920899786,36cyclictest15-21ksoftirqd/009:40:060
29226997761,10cyclictest28972-21kworker/u17:3-rpciod12:22:242
29226997759,13cyclictest0-21swapper/211:56:412
29226997758,14cyclictest25598-21sh12:12:302
29226997758,14cyclictest25598-21sh12:12:302
29226997753,9cyclictest181rcu_preempt10:23:392
29226997753,9cyclictest181rcu_preempt10:23:392
29220997753,17cyclictest29195-21cyclictest07:06:271
29220997753,17cyclictest29195-21cyclictest07:06:271
29220997753,16cyclictest0-21swapper/108:01:071
29220997753,14cyclictest0-21swapper/107:06:051
29208997761,10cyclictest23299-21ssh09:26:430
29226997661,10cyclictest29195-21cyclictest09:06:322
29220997660,11cyclictest3882-21diskmemload12:02:021
29220997655,16cyclictest30531-21unixbench_singl11:26:421
29220997655,10cyclictest0-21swapper/109:56:091
29220997655,10cyclictest0-21swapper/109:56:091
29220997645,9cyclictest181rcu_preempt07:21:061
29220997610,48cyclictest26226-21cat11:21:071
2920899766,28cyclictest15-21ksoftirqd/010:08:150
2920899766,28cyclictest15-21ksoftirqd/010:08:150
29208997657,13cyclictest8941-21latency_hist11:46:080
29208997656,14cyclictest30128-21unixbench_multi10:31:410
29208997656,14cyclictest30128-21unixbench_multi10:31:410
2920899762,52cyclictest15-21ksoftirqd/009:05:370
2920899762,52cyclictest15-21ksoftirqd/009:05:370
2920899762,40cyclictest22228-21ssh12:07:520
2922699756,37cyclictest39-21ksoftirqd/208:58:172
2922699756,37cyclictest39-21ksoftirqd/208:58:172
29226997559,11cyclictest29195-21cyclictest08:26:052
29226997544,8cyclictest181rcu_preempt10:56:142
29226997535,10cyclictest31839-21systemd-run10:36:062
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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