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2026-08-16 - 15:02
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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 Sun Aug 16, 2026 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20955217710,112sleep020976-21unixbench_singl19:05:460
1999421459,34sleep220013-21apt-get19:05:062
214809912254,61cyclictest6325-40ogrotate23:59:550
214809912254,61cyclictest6325-40ogrotate23:59:550
214809911616,69cyclictest14394-21seq21:38:320
214809911616,69cyclictest14394-21seq21:38:320
214809911430,53cyclictest15936-21kworker/u17:2+xprtiod00:33:050
21480991142,53cyclictest30371-21ssh22:55:120
214809911212,23cyclictest1995-21sh23:51:480
214809911211,65cyclictest0-21swapper/021:15:000
214809911211,65cyclictest0-21swapper/021:15:000
21480991099,64cyclictest0-21swapper/000:05:120
214809910926,46cyclictest0-21swapper/000:00:400
21480991072,28cyclictest30980-21rm23:46:020
21485991063,71cyclictest20931-21apt-get22:40:111
21480991068,9cyclictest0-21swapper/021:18:160
21480991064,23cyclictest22547-21timerandwakeup21:50:320
21480991063,30cyclictest353-21runrttasks00:11:460
21480991062,24cyclictest29468-21ssh22:53:320
21480991062,23cyclictest4089-21ssh21:21:270
21480991062,23cyclictest4089-21ssh21:21:270
21480991062,23cyclictest353-21runrttasks00:21:480
21480991062,23cyclictest353-21runrttasks00:21:480
21480991059,23cyclictest24685-21ssh00:28:030
21480991059,23cyclictest24685-21ssh00:28:030
21480991053,29cyclictest31250-21ssh22:05:120
214809910531,43cyclictest30888-21kworker/u17:4+xprtiod22:11:470
214809910531,43cyclictest30888-21kworker/u17:4+xprtiod22:11:470
21480991052,24cyclictest29717-21ssh22:02:040
21498991042,76cyclictest6996-21chrt00:00:163
214949910456,35cyclictest26311-21kworker/u19:3+flush-179:000:00:132
21480991044,30cyclictest20661-21gpgv22:40:010
214809910412,22cyclictest29880-21sh00:36:410
21485991033,73cyclictest6945-21apt-get00:00:171
21480991034,27cyclictest353-21runrttasks22:33:000
21480991033,27cyclictest378-21sshd20:24:410
21480991033,26cyclictest14167-21sh23:20:240
21480991032,28cyclictest5563-21munin-run19:59:580
21480991032,25cyclictest30166-21taskset19:35:110
21480991024,28cyclictest26727-21latency_hist19:24:590
21480991013,9cyclictest0-21swapper/022:40:500
21480991012,22cyclictest16819-21ssh21:41:340
214809910038,39cyclictest1278-21kworker/u17:1+nfsiod23:31:520
21480991003,30cyclictest7578-21grep20:05:170
21480991003,30cyclictest7578-21grep20:05:170
21480991003,23cyclictest3134-21grep19:50:290
21480991002,36cyclictest14076-21modprobe22:29:560
21480991002,36cyclictest14076-21modprobe22:29:560
21480991002,23cyclictest10970-21ssh21:32:540
2148099993,8cyclictest0-21swapper/023:45:100
2148099993,10cyclictest0-21swapper/021:25:090
2148099993,10cyclictest0-21swapper/021:25:090
2148099992,27cyclictest5841-21runrttasks22:15:310
2148099984,34cyclictest17160-21/usr/sbin/munin23:25:140
2148099984,32cyclictest10601-21/usr/sbin/munin20:15:180
2148099983,27cyclictest25542-21/usr/sbin/munin21:55:290
2148099983,27cyclictest25542-21/usr/sbin/munin21:55:290
21485999711,69cyclictest1394-21ssh23:00:251
2148099973,24cyclictest9103-21sh23:11:450
2148099963,33cyclictest377-21snmpd23:05:490
2148099963,33cyclictest377-21snmpd23:05:490
2148099963,31cyclictest11257-21sh23:15:260
2148099963,29cyclictest6641-21timerwakeupswit20:00:340
2148099963,29cyclictest6641-21timerwakeupswit20:00:340
2148099962,33cyclictest21921-21tune2fs19:10:190
2149499953,69cyclictest29377-21ssh00:35:502
2148099955,27cyclictest31774-21/usr/sbin/munin19:40:290
21480999543,46cyclictest1-21systemd20:14:570
21480999543,46cyclictest1-21systemd20:14:570
2148099953,32cyclictest24670-21unixbench_multi20:55:310
2148099953,32cyclictest24670-21unixbench_multi20:55:310
2148099953,13cyclictest0-21swapper/021:48:530
2148099952,28cyclictest28390-21ssh21:09:560
2148099944,83cyclictest1364-21apt-get23:00:210
2148099944,31cyclictest353-21runrttasks20:52:430
2148099943,29cyclictest16998-21cmp20:34:590
2148099943,29cyclictest16998-21cmp20:34:590
2148099943,27cyclictest353-21runrttasks00:15:210
2148099942,28cyclictest24598-21fschecks_time22:45:500
2148099942,27cyclictest378-21sshd20:40:440
210442945,63sleep10-21swapper/119:06:081
2148099935,29cyclictest29083-21ntpq19:30:270
2148099935,29cyclictest29083-21ntpq19:30:270
2148099934,24cyclictest353-21runrttasks20:45:300
2148099933,32cyclictest9176-21unixbench_multi22:20:330
2148099933,30cyclictest28295-21modprobe19:29:570
2148099933,30cyclictest25954-21awk21:00:280
2148099933,24cyclictest26291-21awk23:39:560
2148099923,31cyclictest23929-21sort19:15:210
2148099923,30cyclictest13871-21taskset20:25:110
2148099923,28cyclictest926-21/usr/sbin/munin19:45:210
21494999151,12cyclictest181rcu_preempt00:09:442
21494999146,16cyclictest181rcu_preempt20:15:292
2148099914,26cyclictest353-21runrttasks20:35:110
21494998954,12cyclictest181rcu_preempt22:33:142
2149499894,71cyclictest20961-21ssh22:40:122
21494998943,19cyclictest181rcu_preempt20:10:282
21494998943,19cyclictest181rcu_preempt20:10:282
2148599883,60cyclictest29096-21apt-get00:35:121
2148599873,57cyclictest17317-21apt-get20:35:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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