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2026-03-23 - 00:18
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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 Sun Mar 22, 2026 12:44:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12084218213,44sleep212105-21systemd-run07:04:462
10731215313,107sleep10-21swapper/107:00:211
12300991142,35cyclictest23191-21runrttasks11:53:100
123009911315,27cyclictest352-21runrttasks10:47:540
123009911235,66cyclictest0-21swapper/011:09:470
123009911235,66cyclictest0-21swapper/011:09:470
11489211131,50sleep30-21swapper/307:00:563
12300991084,32cyclictest31012-21timerwakeupswit12:05:200
12300991084,32cyclictest31012-21timerwakeupswit12:05:200
123009910430,67cyclictest0-21swapper/009:12:020
12300991042,41cyclictest24108-21ssh11:54:570
12300991042,27cyclictest22585-21latency_hist09:09:460
123009910238,58cyclictest352-21runrttasks11:15:250
123009910238,58cyclictest352-21runrttasks11:15:250
12300991023,35cyclictest16194-21grep11:40:210
12300991023,29cyclictest32260-21sed11:14:450
123009910135,57cyclictest0-21swapper/010:54:470
123009910135,57cyclictest0-21swapper/010:54:470
12300991013,25cyclictest15148-21munin-plugin-st12:34:420
123009910131,63cyclictest0-21swapper/009:39:460
123529910059,9cyclictest181rcu_preempt08:05:052
123529910059,9cyclictest181rcu_preempt08:05:052
12300991004,30cyclictest11907-21fschecks_count10:40:080
123009910042,51cyclictest0-21swapper/009:34:460
123009910042,51cyclictest0-21swapper/009:34:460
123009910041,52cyclictest0-21swapper/007:20:080
12300991003,35cyclictest7539-21grep08:25:160
12300991002,30cyclictest352-21runrttasks10:08:490
1230099993,31cyclictest1-21systemd09:59:440
12300999923,7cyclictest0-21swapper/011:59:580
1230099984,32cyclictest6461-21ssh10:30:170
1230099984,32cyclictest6461-21ssh10:30:170
12300999842,50cyclictest13669-21ssh11:36:270
12300999842,50cyclictest13669-21ssh11:36:270
1230099983,34cyclictest28737-21/usr/sbin/munin09:20:030
1230099983,34cyclictest12336-21proc_pri09:45:580
1230099983,32cyclictest3884-21fschecks_time12:15:050
1230099983,32cyclictest3884-21fschecks_time12:15:050
1230099982,32cyclictest21041-21latency_hist07:29:430
12300999737,54cyclictest0-21swapper/011:30:200
12300999736,54cyclictest22726-21ssh10:04:000
12300999736,54cyclictest22726-21ssh10:04:000
1230099973,32cyclictest3413-21proc_pri10:25:160
1230099973,31cyclictest352-21runrttasks08:57:340
1230099973,30cyclictest31230-21/usr/sbin/munin08:00:120
1230099973,30cyclictest31230-21/usr/sbin/munin08:00:120
1230099973,28cyclictest8179-21/usr/sbin/munin09:40:110
1230099973,28cyclictest8179-21/usr/sbin/munin09:40:110
12300999731,57cyclictest0-21swapper/011:24:440
12300999722,10cyclictest0-21swapper/009:15:170
12300999718,30cyclictest12069-21uname08:40:100
1230099964,32cyclictest18032-21latency_hist07:19:470
1230099964,31cyclictest27027-21mailstats10:10:170
1230099964,31cyclictest27027-21mailstats10:10:170
1230099964,29cyclictest877-21fschecks_time12:10:060
1230099963,33cyclictest9205-21latency_hist12:24:450
1230099963,32cyclictest10354-21fschecks_time08:35:050
1230099963,31cyclictest16503-21ssh09:53:140
1230099963,28cyclictest352-21runrttasks09:26:410
1230099963,24cyclictest2555-21cat10:24:460
1230099963,24cyclictest2555-21cat10:24:460
1230099962,35cyclictest14097-21switchtime07:09:530
1230099962,33cyclictest22637-21modprobe07:34:430
1230099962,31cyclictest15941-21cron07:14:430
1230099962,31cyclictest15941-21cron07:14:430
1230099954,35cyclictest24327-21mailstats11:00:180
12300999539,48cyclictest0-21swapper/009:04:440
1230099953,36cyclictest3499-21latency_hist08:14:460
1230099953,33cyclictest24368-21apt-key07:39:450
12300999532,56cyclictest12459-21latency_hist07:04:490
1230099953,24cyclictest6189-21/usr/sbin/munin11:25:110
1230099953,24cyclictest6189-21/usr/sbin/munin11:25:110
1230099952,33cyclictest662-21fschecks_time08:05:050
1230099952,33cyclictest662-21fschecks_time08:05:050
1230099952,24cyclictest13569-21tune2fs08:45:070
12300999521,27cyclictest277-21dbus-daemon07:49:450
1230099944,32cyclictest29244-21/usr/sbin/munin10:15:070
1230099943,32cyclictest19164-21unixbench_singl11:45:210
1230099943,27cyclictest8680-21/usr/sbin/munin10:35:190
1230099943,26cyclictest30967-21cron07:59:430
1230099943,26cyclictest30967-21cron07:59:430
1230099943,25cyclictest15174-21cut08:50:050
12300999414,23cyclictest11765-21sh12:28:370
12352999349,26cyclictest181rcu_preempt08:34:452
12352999349,26cyclictest181rcu_preempt08:34:452
1230099933,31cyclictest5239-21/usr/sbin/munin08:20:180
1230099933,28cyclictest20569-21/usr/sbin/munin10:55:160
1230099932,35cyclictest28260-21fschecks_time07:50:070
1230099923,31cyclictest25063-21fschecks_count07:41:050
1230099914,29cyclictest9978-21seq08:34:460
1230099914,29cyclictest9978-21seq08:34:460
1230099912,31cyclictest3634-21/usr/sbin/munin08:15:040
12352999045,7cyclictest181rcu_preempt09:55:192
1232899893,64cyclictest11408-21apt-get09:45:111
1235299884,66cyclictest352-21runrttasks11:20:232
12352998840,17cyclictest181rcu_preempt12:29:552
12352998825,14cyclictest0-21swapper/209:24:502
12328998871,11cyclictest12269-21cyclictest07:20:071
12352998651,9cyclictest181rcu_preempt11:40:312
12352998448,8cyclictest181rcu_preempt10:00:232
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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