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2026-07-15 - 16:16
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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 Jul 15, 2026 12:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1229226670,38sleep30-21swapper/306:56:583
11166214913,92sleep211217-21fschecks_time06:52:502
12385991134,95cyclictest30338-21apt-get11:02:140
1219921136,86sleep00-21swapper/006:56:150
12385991052,84cyclictest19755-21kworker/u19:1+ext4-rsv-conversion09:07:280
12388999961,21cyclictest6462-21taskset10:22:281
12388999961,21cyclictest6462-21taskset10:22:281
12385999972,17cyclictest277-21dbus-daemon07:27:000
274542960,8sleep30-21swapper/307:41:343
1238599963,74cyclictest10127-21runrttasks08:27:230
1238599963,74cyclictest10127-21runrttasks08:27:230
1238599961,56cyclictest21525-21ssh11:42:010
1238599961,56cyclictest21525-21ssh11:42:010
1238599949,66cyclictest5803-21apt-get10:22:140
1238599949,66cyclictest5803-21apt-get10:22:140
12392999171,14cyclictest9826-21latency_hist08:27:012
12392999171,14cyclictest9826-21latency_hist08:27:012
1238599883,64cyclictest13931-21apt07:01:590
1238599883,64cyclictest13931-21apt07:01:590
12392998767,14cyclictest26966-21latency_hist10:57:002
1238599873,41cyclictest23968-21grep09:57:200
12392998667,13cyclictest10694-21sh12:17:422
12392998667,13cyclictest10694-21sh12:17:422
12388998620,28cyclictest0-21swapper/110:10:321
12388998523,23cyclictest7632-21seq08:17:491
12388998523,23cyclictest7632-21seq08:17:491
12388998521,27cyclictest30970-21seq09:14:051
12388998521,27cyclictest30970-21seq09:14:051
1091328514,45sleep110433-21apt-get06:52:121
12388998423,22cyclictest9095-21ssh11:20:591
12388998422,25cyclictest25710-21seq07:34:431
1238599845,60cyclictest16801-21apt-get08:47:130
12388998361,15cyclictest32485-21latency_hist07:57:011
12388998355,19cyclictest17735-21sh09:47:051
12388998333,39cyclictest0-21swapper/110:17:111
12388998329,23cyclictest20651-21seq10:46:191
1239299822,53cyclictest10100-21apt-get08:27:142
1239299822,53cyclictest10100-21apt-get08:27:142
12388998232,37cyclictest0-21swapper/107:12:131
12388998221,24cyclictest352-21runrttasks08:38:181
12385998229,11cyclictest181rcu_preempt08:53:000
12392998163,12cyclictest2850-21/usr/sbin/munin09:22:182
12392998163,12cyclictest2850-21/usr/sbin/munin09:22:182
12388998125,22cyclictest20701-21ssh11:40:121
12388998125,22cyclictest20701-21ssh11:40:121
12388998123,22cyclictest14522-21seq11:29:281
12385998159,14cyclictest14627-21ssh09:42:010
12385998138,16cyclictest181rcu_preempt12:07:080
12385998125,30cyclictest8525-21kworker/0:1-cgroup_destroy10:17:000
12388998042,8cyclictest181rcu_preempt11:22:321
12388998042,8cyclictest181rcu_preempt11:22:321
12388998038,16cyclictest181rcu_preempt08:57:211
12388998019,26cyclictest0-21swapper/112:03:401
12388998019,26cyclictest0-21swapper/112:03:401
12385998029,10cyclictest181rcu_preempt08:12:300
12392997956,15cyclictest20851-21sort09:52:162
12392997956,15cyclictest20851-21sort09:52:162
12388997923,26cyclictest352-21runrttasks12:13:291
12388997921,26cyclictest0-21swapper/108:50:051
12388997921,24cyclictest23010-21seq07:27:501
12385997955,15cyclictest17664-21ssh11:35:010
12385997945,11cyclictest181rcu_preempt09:32:130
12385997945,11cyclictest181rcu_preempt09:32:130
12385997944,14cyclictest181rcu_preempt09:47:240
12385997940,21cyclictest181rcu_preempt10:56:130
12385997936,20cyclictest12377-21cyclictest08:22:220
12385997936,20cyclictest12377-21cyclictest08:22:220
1238599793,38cyclictest9625-21fschecks_time10:27:210
1238599792,47cyclictest16015-21sendmail-msp07:06:580
12392997860,12cyclictest19771-21diskmemload09:19:562
12388997858,14cyclictest16953-21apt-config09:45:411
12388997858,14cyclictest16953-21apt-config09:45:411
12388997824,43cyclictest0-21swapper/108:22:101
12388997824,43cyclictest0-21swapper/108:22:101
12385997859,13cyclictest27339-21latency_hist11:52:000
12385997858,13cyclictest12377-21cyclictest09:27:210
12385997855,14cyclictest31275-21ssh10:09:010
1238599785,15cyclictest13374-21ntp_states11:27:280
12385997849,12cyclictest181rcu_preempt09:17:100
12385997843,12cyclictest181rcu_preempt07:57:160
1238599783,45cyclictest23114-21ssh09:02:120
12385997833,10cyclictest181rcu_preempt07:30:120
12392997762,11cyclictest12377-21cyclictest11:55:202
12392997762,11cyclictest12377-21cyclictest11:55:202
12392997758,12cyclictest300-21rs:main2
12392997755,15cyclictest18431-21latency_hist11:37:002
12392997746,9cyclictest181rcu_preempt07:32:342
12388997753,16cyclictest19771-21diskmemload10:57:371
12388997728,44cyclictest0-21swapper/112:17:121
12388997728,44cyclictest0-21swapper/112:17:121
12388997720,24cyclictest23151-21runrttasks09:56:181
12388997720,24cyclictest23151-21runrttasks09:56:181
12388997718,27cyclictest20390-21unixbench_multi07:17:361
12385997753,8cyclictest181rcu_preempt09:15:320
12385997753,8cyclictest181rcu_preempt09:15:320
12385997752,9cyclictest181rcu_preempt08:02:210
12385997748,9cyclictest181rcu_preempt11:15:520
12385997748,9cyclictest181rcu_preempt11:15:520
12385997747,13cyclictest181rcu_preempt07:07:120
12385997738,12cyclictest181rcu_preempt08:32:550
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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