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2026-04-21 - 00:02
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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 Mon Apr 20, 2026 12:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
224069912229,82cyclictest0-21swapper/009:48:160
224069911832,11cyclictest0-21swapper/008:13:160
224069911534,13cyclictest0-21swapper/010:18:140
22406991146,27cyclictest26293-21timerandwakeup11:38:240
21131211112,63sleep121207-21tune2fs06:58:151
224069911041,14cyclictest2481-21ntp_kernel_pll_11:53:170
224069911041,14cyclictest2481-21ntp_kernel_pll_11:53:170
22406991094,35cyclictest14891-21latency_hist09:32:500
22406991093,37cyclictest24004-21cmp09:47:500
22406991093,28cyclictest16642-21/usr/sbin/munin08:23:250
224069910818,25cyclictest16100-21modprobe11:22:470
224069910734,16cyclictest0-21swapper/010:28:250
22406991072,23cyclictest11403-21grep12:08:100
224069910653,46cyclictest2374-21systemd-journal12:07:480
224069910633,11cyclictest0-21swapper/007:38:200
22406991054,33cyclictest26126-21latency_hist07:12:510
22406991054,33cyclictest26126-21latency_hist07:12:510
224069910435,13cyclictest1-21systemd11:02:480
224069910434,9cyclictest0-21swapper/007:32:510
22406991034,39cyclictest6708-21sh11:59:450
22406991033,37cyclictest22114-21ssh11:32:470
224069910248,47cyclictest8025-21ssh09:20:320
22406991023,38cyclictest27822-21latency_hist08:57:500
22406991023,38cyclictest13263-21ssh10:23:080
224069910233,10cyclictest0-21swapper/009:07:510
22339210218,61sleep022285-21/usr/sbin/munin07:02:510
22407991003,76cyclictest24313-21apt-get09:48:161
22406991003,41cyclictest3655-21grep09:13:150
22406991003,36cyclictest4194-21wc07:43:470
22406991003,36cyclictest4194-21wc07:43:470
22406991002,35cyclictest4646-21grep10:08:160
22406991002,35cyclictest30871-21latency_hist10:52:510
22406999937,10cyclictest18745-21ssh09:38:220
2240699993,39cyclictest19235-21latency_hist11:27:500
2240699993,27cyclictest6245-21tail07:48:250
2240699992,39cyclictest1691-21sh10:03:190
2240699992,39cyclictest1691-21sh10:03:190
22407999848,44cyclictest4420-21kworker/u17:3+events_unbound11:52:471
2240699983,38cyclictest352-21runrttasks11:51:390
2240699983,36cyclictest8213-21ssh11:08:220
2240699983,36cyclictest8213-21ssh11:08:220
2240699983,31cyclictest27525-21/usr/sbin/munin09:53:510
2240699982,37cyclictest16653-21rm12:17:300
2240699982,35cyclictest18248-21/usr/sbin/munin08:28:210
2240699982,25cyclictest9746-21ntp_kernel_pll_09:23:170
2240699982,25cyclictest9746-21ntp_kernel_pll_09:23:170
22406999737,8cyclictest0-21swapper/012:27:590
22406999737,8cyclictest0-21swapper/012:27:590
2240699973,35cyclictest23941-21latency_hist07:07:500
2240699973,21cyclictest28988-21/usr/sbin/munin11:43:170
2240699972,47cyclictest24800-21latency_hist10:42:500
2240699972,47cyclictest24800-21latency_hist10:42:500
2240699972,39cyclictest4462-21/usr/sbin/munin11:03:110
2240699972,39cyclictest4462-21/usr/sbin/munin11:03:110
2240699972,37cyclictest28957-21unixbench_singl08:58:250
2240699972,37cyclictest28957-21unixbench_singl08:58:250
2240699963,37cyclictest9293-21cat07:58:230
2240699962,40cyclictest29700-21fschecks_count07:23:100
2240699962,38cyclictest352-21runrttasks09:12:100
2240699943,35cyclictest25871-21ssh10:43:230
2240699943,34cyclictest24547-21latency_hist08:47:490
2240699943,34cyclictest24547-21latency_hist08:47:490
2240699942,39cyclictest19903-21/usr/sbin/munin10:33:230
2240799934,47cyclictest29332-21diskmemload11:58:131
22407999337,49cyclictest29332-21diskmemload11:12:471
22407999337,49cyclictest29332-21diskmemload11:12:471
2240699932,35cyclictest31334-21sh09:58:230
2240799903,25cyclictest3733-21sshd07:42:591
2240799903,25cyclictest3733-21sshd07:42:591
2240699903,40cyclictest17793-21modprobe09:37:470
22407998938,44cyclictest30298-21sh09:03:201
2240799893,31cyclictest23362-21rm12:28:111
2240799893,31cyclictest23362-21rm12:28:111
22407998850,32cyclictest16163-21ssh12:16:061
2240799884,31cyclictest1063-21apt-get10:02:591
2240799884,31cyclictest1063-21apt-get10:02:591
22407998833,48cyclictest21393-21latency_hist08:37:511
2240799882,30cyclictest25777-21ssh10:43:221
22408998766,14cyclictest300-21rs:main2
22407998763,14cyclictest12672-21sh11:16:311
22407998721,23cyclictest16416-21cat11:22:571
22408998644,13cyclictest181rcu_preempt09:17:512
22407998662,18cyclictest10937-21latency_hist12:07:501
22407998658,21cyclictest6879-21latency_hist10:12:501
2240799862,44cyclictest20083-21grep10:33:251
22408998561,16cyclictest352-21runrttasks07:23:112
2240799854,31cyclictest6884-21processes09:18:211
22407998540,38cyclictest0-21swapper/107:38:161
2240799853,41cyclictest31613-21unixbench_singl09:58:261
2240799853,31cyclictest15988-21/usr/sbin/munin10:28:171
2240799853,24cyclictest352-21runrttasks09:57:251
22407998531,46cyclictest0-21swapper/111:47:491
22408998465,13cyclictest2374-21systemd-journal10:18:592
22408998465,11cyclictest0-21swapper/209:28:232
22407998460,17cyclictest4878-21apt-key11:57:511
22407998460,17cyclictest4878-21apt-key11:57:511
22407998438,38cyclictest0-21swapper/108:42:511
2130528411,41sleep20-21swapper/206:58:202
22408998363,13cyclictest14115-21proc_pri11:18:192
22407998355,20cyclictest13723-21fschecks_time08:13:101
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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