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2026-06-10 - 15:22
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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 Jun 10, 2026 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4678213120,65sleep24704-21munin-run06:59:222
352421249,74sleep13543-21fschecks_count06:54:491
48569910590,10cyclictest7907-21apt-get10:39:462
48569910590,10cyclictest7907-21apt-get10:39:462
4840991036,87cyclictest18625-21ssh09:09:430
4840991036,87cyclictest18625-21ssh09:09:430
4840991023,79cyclictest8009-21diskmemload10:39:480
4840991023,79cyclictest8009-21diskmemload10:39:480
4840999862,28cyclictest297-21systemd-logind10:39:230
4856999769,20cyclictest15812-21ssh09:59:212
4856999468,20cyclictest22683-21netstat10:09:482
4856999353,33cyclictest0-21swapper/209:09:372
4856999353,33cyclictest0-21swapper/209:09:372
4848999172,12cyclictest2262-21cron08:29:221
4848999169,15cyclictest6778-21sh09:44:211
4848999169,15cyclictest6778-21sh09:44:211
4840999156,8cyclictest181rcu_preempt12:07:240
4840999156,8cyclictest181rcu_preempt12:07:240
4856999073,10cyclictest11981-21fschecks_time11:39:432
4856999073,10cyclictest11981-21fschecks_time11:39:432
4848999072,12cyclictest352-21runrttasks09:29:491
4856998963,18cyclictest6706-21unixbench_singl08:39:562
4848998970,12cyclictest297-21systemd-logind08:54:221
4848998970,12cyclictest297-21systemd-logind08:54:221
4856998765,16cyclictest18060-21gpgv09:09:252
4856998765,16cyclictest18060-21gpgv09:09:252
4840998514,46cyclictest15-21ksoftirqd/009:44:430
484099842,64cyclictest4692-21kworker/u18:1+ext4-rsv-conversion07:05:070
4856998360,16cyclictest15791-21kworker/u17:3+events_unbound10:04:212
4848998315,32cyclictest17966-21ps10:55:181
4848998315,32cyclictest17966-21ps10:55:181
4840998343,7cyclictest181rcu_preempt09:54:160
4856998236,28cyclictest10894-21apt-get10:44:322
4848998261,14cyclictest27678-21sh11:11:101
4848998260,15cyclictest22637-21sh11:03:551
484899824,57cyclictest7907-21apt-get10:39:381
484899824,57cyclictest7907-21apt-get10:39:381
4840998256,8cyclictest181rcu_preempt11:44:010
4840998256,8cyclictest181rcu_preempt11:44:010
4840998255,18cyclictest4503-21kernelversion08:34:470
4856998164,12cyclictest4827-21cyclictest10:38:252
4856998163,13cyclictest27394-21latency_hist09:24:252
4856998161,13cyclictest2374-21systemd-journal10:29:362
4848998162,13cyclictest277-21dbus-daemon09:09:231
4848998162,13cyclictest277-21dbus-daemon09:09:231
4840998155,8cyclictest181rcu_preempt10:30:240
4840998150,9cyclictest181rcu_preempt08:54:240
4840998150,9cyclictest181rcu_preempt08:54:240
4840998149,9cyclictest181rcu_preempt07:59:240
4840998149,9cyclictest181rcu_preempt07:59:240
4840998141,8cyclictest181rcu_preempt12:23:540
4840998136,16cyclictest181rcu_preempt11:02:440
364928110,38sleep00-21swapper/006:54:520
4856998061,14cyclictest10786-21proc_pri09:49:542
4840998049,7cyclictest181rcu_preempt07:44:380
4840998047,9cyclictest181rcu_preempt08:04:250
4856997956,14cyclictest23854-21ssh11:59:392
4856997949,21cyclictest19031-21cut07:39:422
4856997944,13cyclictest181rcu_preempt09:24:372
484899792,60cyclictest7313-21runrttasks07:04:501
4848997913,23cyclictest10093-21seq07:12:151
4848997913,23cyclictest10093-21seq07:12:151
4840997969,6cyclictest0-21swapper/010:47:070
4840997944,12cyclictest181rcu_preempt11:29:400
4840997944,12cyclictest181rcu_preempt11:29:400
484099793,31cyclictest15-21ksoftirqd/010:06:110
484099793,31cyclictest15-21ksoftirqd/010:06:110
4856997860,12cyclictest29670-21acpi12:09:302
4840997845,12cyclictest181rcu_preempt07:34:570
484099783,37cyclictest15-21ksoftirqd/007:33:390
4856997756,14cyclictest25529-21kworker/u17:3-nfsiod09:34:262
4856997742,10cyclictest58-21kcompactd011:14:212
4856997713,31cyclictest14696-21ssh11:44:382
4848997735,31cyclictest18865-21sh09:10:241
4848997735,31cyclictest18865-21sh09:10:241
4848997713,32cyclictest3278-21grep12:19:371
4848997713,25cyclictest1302-21head12:14:571
4840997745,12cyclictest181rcu_preempt08:09:390
484099774,41cyclictest29665-21/usr/sbin/munin12:09:450
4840997742,15cyclictest181rcu_preempt08:43:520
4840997732,17cyclictest181rcu_preempt10:10:100
4856997655,11cyclictest0-21swapper/207:29:432
4856997652,9cyclictest39-21ksoftirqd/209:42:322
4856997652,9cyclictest39-21ksoftirqd/209:42:322
4856997646,20cyclictest5675-21/usr/sbin/munin11:29:572
4856997646,20cyclictest5675-21/usr/sbin/munin11:29:572
4856997640,7cyclictest181rcu_preempt10:20:052
485699762,42cyclictest25543-21fschecks_time07:59:432
484899769,36cyclictest352-21runrttasks07:57:581
484899769,36cyclictest352-21runrttasks07:57:581
4848997657,13cyclictest1-21systemd07:04:241
4848997654,14cyclictest14422-21ssh11:44:241
4848997654,14cyclictest14422-21ssh11:44:241
4848997650,17cyclictest13761-21apt-key07:24:261
4848997650,17cyclictest13761-21apt-key07:24:261
4848997618,17cyclictest11967-21diskmemload11:53:101
4848997612,24cyclictest6988-21seq08:43:061
4840997661,8cyclictest24796-21ssh09:19:420
4840997646,13cyclictest181rcu_preempt07:49:450
4840997646,13cyclictest181rcu_preempt07:49:450
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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