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2026-04-04 - 09:14
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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 Sat Apr 04, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23140211411,70sleep023196-21sort18:59:390
238669911057,46cyclictest14598-21threads21:29:270
23866991092,22cyclictest107472grep00:04:200
23866991053,47cyclictest19261-21mailstats23:24:270
23866991053,47cyclictest19261-21mailstats23:24:270
23866991044,28cyclictest2618-21taskset23:50:270
23866991044,28cyclictest2618-21taskset23:50:270
23866991043,43cyclictest19767-21/usr/sbin/munin00:19:250
23866991043,27cyclictest9460-21/usr/sbin/munin23:09:270
23866991043,27cyclictest9460-21/usr/sbin/munin23:09:270
23866991043,27cyclictest10764-21grep19:59:310
23866991033,28cyclictest30829-21diskmemload22:39:210
23866991033,28cyclictest29727-21latency_hist22:48:570
23866991033,28cyclictest29727-21latency_hist22:48:570
23866991033,26cyclictest2036-21rm21:09:170
238669910322,24cyclictest6552-21sort19:48:570
23290210310,63sleep223378-21unixbench_singl18:59:412
238669910244,52cyclictest363-21fschecks_time19:29:150
23866991022,31cyclictest19765-21/usr/sbin/munin21:39:170
238669910218,77cyclictest0-21swapper/019:04:170
23866991014,29cyclictest352-21runrttasks22:53:090
23866991013,30cyclictest10437-21latency_hist21:23:560
238669910029,50cyclictest0-21swapper/023:48:140
2386699999,32cyclictest26589-21processes20:49:250
2386699999,32cyclictest26589-21processes20:49:250
2386699993,31cyclictest21241-21/usr/sbin/munin22:34:180
2386699993,25cyclictest27887-21latency_hist00:33:560
2386699993,23cyclictest2952-21systemd-journal20:48:540
2386699992,34cyclictest87-21kswapd022:19:470
2386699992,24cyclictest3412-21runrttasks22:58:570
2386699992,24cyclictest3412-21runrttasks22:58:570
2386699984,38cyclictest22116-21/usr/sbin/munin23:29:210
2386699984,29cyclictest17208-21grep00:14:320
2386699984,29cyclictest17208-21grep00:14:320
2386699984,28cyclictest7430-21modprobe21:18:540
23866999842,50cyclictest7314-21ssh23:59:110
2386699982,32cyclictest13184-21proc_pri23:14:250
2386699973,83cyclictest6929-21ssh23:58:560
2386699973,37cyclictest352-21runrttasks22:04:590
2386699973,22cyclictest15516-21/usr/sbin/munin22:24:260
2386699972,21cyclictest14713-21apt-get20:14:060
23866999718,24cyclictest30137-21seq23:43:380
23873999656,20cyclictest181rcu_preempt22:56:012
23873999656,20cyclictest181rcu_preempt22:56:012
23866999673,18cyclictest0-21swapper/022:14:180
23866999673,18cyclictest0-21swapper/022:14:180
2386699964,33cyclictest8301-21ls22:13:570
2386699963,38cyclictest30048-21switchtime19:19:260
2386699963,34cyclictest17464-21uname21:34:270
2386699962,26cyclictest13149-21runrttasks21:28:080
2386699953,33cyclictest9595-21latency_hist19:58:570
2386699953,33cyclictest352-21runrttasks00:25:540
2386699953,33cyclictest352-21runrttasks00:25:540
2386699953,32cyclictest28241-21sendmail_mailqu20:54:260
2386699953,29cyclictest13110-21/usr/sbin/munin00:09:290
2386699953,28cyclictest12802-21latency_hist20:08:540
2386699953,21cyclictest26161-21ssh23:35:550
2386699953,21cyclictest26161-21ssh23:35:550
2386699953,19cyclictest16341-21/usr/sbin/munin23:19:280
2386699952,29cyclictest28895-21/usr/sbin/munin21:54:100
2386699952,29cyclictest28895-21/usr/sbin/munin21:54:100
23866999514,26cyclictest31172-21taskset21:04:080
23866999514,26cyclictest31172-21taskset21:04:080
2386699944,32cyclictest26539-21grep21:49:270
2386699943,31cyclictest6653-21expr23:04:100
2386699943,18cyclictest13067-21apt-get20:09:040
2386699942,28cyclictest6793-21fschecks_count19:49:140
2386699942,27cyclictest31884-21cpu21:59:100
23873999347,15cyclictest181rcu_preempt22:29:152
2386699937,11cyclictest0-21swapper/022:59:310
2386699934,31cyclictest4867-21latency_hist19:43:570
2386699933,35cyclictest17260-21unixbench_singl20:19:300
2386699933,32cyclictest21175-21cpu20:34:090
2386699933,32cyclictest21175-21cpu20:34:090
2386699933,31cyclictest3259-21latency_hist19:38:570
2386699932,32cyclictest19627-21cstates20:29:110
2386699932,32cyclictest19627-21cstates20:29:110
2386699932,26cyclictest18449-21awk22:29:230
23873999260,16cyclictest16836-21ssh22:26:572
23866999237,48cyclictest0-21swapper/021:44:100
2386699923,31cyclictest31855-21grep19:24:280
2386699923,31cyclictest22751-21/usr/sbin/munin20:39:290
2386699923,27cyclictest18330-21latency20:24:190
23870999117,37cyclictest670-21ssh22:00:051
2386699913,32cyclictest28018-21fschecks_time19:14:170
2386699913,30cyclictest352-21runrttasks20:59:090
2386699912,31cyclictest26385-21fschecks_time19:09:180
23873999026,45cyclictest30829-21diskmemload22:19:102
23873998862,17cyclictest10160-21ssh23:09:252
23873998862,17cyclictest10160-21ssh23:09:252
23873998848,9cyclictest181rcu_preempt22:53:572
23873998839,17cyclictest181rcu_preempt19:19:092
23873998761,10cyclictest181rcu_preempt22:44:292
23873998761,10cyclictest181rcu_preempt22:44:292
23873998758,9cyclictest181rcu_preempt21:33:142
23873998756,12cyclictest181rcu_preempt21:11:222
23873998747,11cyclictest181rcu_preempt21:15:092
225782877,55sleep122579-21diskstats18:59:191
23873998655,8cyclictest181rcu_preempt21:38:002
23873998639,14cyclictest0-21swapper/221:46:142
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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