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2026-07-09 - 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 Thu Jul 09, 2026 00:44:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3231212811,88sleep23238-21modprobe18:57:252
225521259,87sleep00-21swapper/018:52:550
33979910672,13cyclictest58-21kcompactd020:57:460
33979910672,13cyclictest58-21kcompactd020:57:460
34049910349,47cyclictest0-21swapper/219:37:462
3404991033,41cyclictest15045-21cat22:52:502
239721019,62sleep12430-21ntpq18:53:001
340499962,43cyclictest11464-21ntp_states20:57:572
340499962,43cyclictest11464-21ntp_states20:57:572
340499959,64cyclictest11981-21apt-get23:42:512
3397999478,10cyclictest10522-21diskmemload21:17:280
3404999336,49cyclictest0-21swapper/200:13:012
3404999336,49cyclictest0-21swapper/200:13:012
340499923,30cyclictest9229-21ssh22:42:562
340499923,28cyclictest3743-21taskset18:57:472
3404999229,10cyclictest0-21swapper/200:22:472
340499913,66cyclictest1106-21modprobe20:27:432
340499913,37cyclictest11594-21kernelversion21:52:502
340499913,37cyclictest11594-21kernelversion21:52:502
3404999127,12cyclictest0-21swapper/220:12:132
3397999142,29cyclictest8413-21ssh23:37:160
3397999142,29cyclictest8413-21ssh23:37:160
340499903,37cyclictest28779-21/usr/sbin/munin21:27:502
340499903,34cyclictest14147-21fschecks_count19:27:472
3404999024,57cyclictest0-21swapper/219:07:452
3404999024,57cyclictest0-21swapper/219:07:452
340499893,36cyclictest8332-21cstates21:47:422
340499893,36cyclictest26073-21ssh21:22:462
3404998933,48cyclictest0-21swapper/219:52:262
340499893,32cyclictest9149-21/usr/sbin/munin20:52:512
340499893,32cyclictest5468-21fschecks_count21:42:452
340499892,60cyclictest2769-21ssh22:32:482
3404998911,27cyclictest18981-21uniq19:42:452
3402998944,11cyclictest58-21kcompactd021:00:561
3402998944,11cyclictest58-21kcompactd021:00:561
340499883,33cyclictest24019-21ntpq23:07:522
340499883,31cyclictest8626-21latency_hist23:37:282
340499883,31cyclictest8626-21latency_hist23:37:282
340499883,28cyclictest32330-21/usr/sbin/munin23:22:342
3404998829,8cyclictest0-21swapper/220:27:272
3404998821,14cyclictest1000-21sh00:17:572
3402998869,9cyclictest0-21swapper/122:12:481
3404998736,44cyclictest0-21swapper/222:58:012
340499873,35cyclictest30289-21timerandwakeup23:18:002
340499873,33cyclictest8493-21grep20:48:022
340499873,30cyclictest14871-21grep21:03:022
340499873,30cyclictest14871-21grep21:03:022
340499873,28cyclictest9779-21tail19:13:212
3404998730,12cyclictest0-21swapper/219:07:292
3404998726,11cyclictest0-21swapper/221:13:002
340499872,31cyclictest27905-21grep00:08:022
340499872,30cyclictest11900-21fschecks_time22:47:472
340499872,26cyclictest23871-21fschecks_time19:57:472
340499863,32cyclictest29121-21sendmail_mailtr20:12:582
340499863,32cyclictest25814-21latency_hist22:17:272
340499863,32cyclictest18156-21fschecks_count23:52:452
340499863,30cyclictest2962-21find21:37:582
340499863,29cyclictest352-21runrttasks19:23:162
340499863,27cyclictest30913-21timerwakeupswit20:18:012
3404998625,12cyclictest0-21swapper/223:28:082
3404998625,11cyclictest0-21swapper/220:41:042
3404998625,11cyclictest0-21swapper/220:41:042
3404998624,13cyclictest0-21swapper/222:40:512
340499862,40cyclictest22419-21cat19:52:512
340499862,33cyclictest4215-21ls20:37:272
340499862,33cyclictest4215-21ls20:37:272
340499853,37cyclictest6210-21idleruntime20:42:482
340499853,35cyclictest25198-21/usr/sbin/munin20:02:592
340499853,32cyclictest23813-21/usr/sbin/munin00:02:472
340499853,30cyclictest17329-21cat21:07:512
340499852,32cyclictest23487-21proc_pri21:17:582
340499852,32cyclictest16118-21ps19:32:552
340499852,32cyclictest16118-21ps19:32:552
340499852,31cyclictest11703-21grep19:18:462
340499852,30cyclictest32109-21sh21:32:482
340499852,29cyclictest15201-21grep23:47:462
340499852,27cyclictest11872-21apt-key23:42:282
340499844,27cyclictest17128-21ssh22:02:402
340499844,27cyclictest17128-21ssh22:02:402
340499843,34cyclictest21336-21sh23:03:002
340499843,33cyclictest26698-21fschecks_time23:12:442
340499843,30cyclictest32527-21ntpq22:27:542
340499843,30cyclictest20929-21ssh23:57:402
340499843,29cyclictest26127-21cstates22:17:422
3404998428,8cyclictest0-21swapper/221:58:022
3404998420,12cyclictest0-21swapper/222:07:552
3397998459,8cyclictest181rcu_preempt23:12:250
3402998366,11cyclictest297-21systemd-logind22:52:251
3397998362,15cyclictest26009-21fschecks_count21:22:450
340499822,30cyclictest31624-21latency_hist22:27:282
340499822,30cyclictest31624-21latency_hist22:27:282
3397998162,12cyclictest29004-21ssh22:22:400
3397998162,12cyclictest29004-21ssh22:22:400
3397998158,9cyclictest15-21ksoftirqd/022:47:510
3402998043,10cyclictest58-21kcompactd022:04:401
3402998043,10cyclictest58-21kcompactd022:04:401
3397998062,12cyclictest28554-21runrttasks22:22:090
3397998055,17cyclictest4171-21latency_hist20:37:270
3397998055,17cyclictest4171-21latency_hist20:37:270
3402997961,13cyclictest352-21runrttasks21:32:421
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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