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2026-04-22 - 08:52
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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 Apr 22, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16480217110,27sleep20-21swapper/218:58:032
16668212911,76sleep18637-21kworker/u18:1+ext4-rsv-conversion18:58:351
17920991172,45cyclictest2731-21apt-get19:52:550
17920991172,45cyclictest2731-21apt-get19:52:550
17920991103,42cyclictest7560-21apt-get20:07:530
179209910954,49cyclictest297-21systemd-logind19:07:420
179209910954,49cyclictest297-21systemd-logind19:07:420
17920991095,27cyclictest14672-21/usr/sbin/munin22:33:200
17920991073,36cyclictest27131-21latency_hist23:47:440
179209910643,56cyclictest0-21swapper/021:17:410
17920991063,33cyclictest17918-21cyclictest19:02:460
179309910577,19cyclictest25060-21diskmemload00:23:061
179209910536,61cyclictest0-21swapper/023:37:560
17920991053,37cyclictest352-21runrttasks00:16:020
17920991047,16cyclictest9360-21ssh23:18:090
17920991043,21cyclictest19695-21cut00:28:380
17920991033,32cyclictest20147-21/usr/sbin/munin19:08:190
17920991033,32cyclictest20147-21/usr/sbin/munin19:08:190
17920991033,31cyclictest30727-21ssh22:04:170
17920991033,31cyclictest30727-21ssh22:04:170
179209910313,12cyclictest0-21swapper/021:23:160
17920991024,32cyclictest31727-21latency_hist19:42:430
17920991023,29cyclictest15855-21fschecks_count20:33:030
17920991023,13cyclictest0-21swapper/000:08:310
17920991023,13cyclictest0-21swapper/000:08:310
17920991022,32cyclictest15168-21/usr/sbin/munin23:28:190
17920991014,39cyclictest28238-21sendmail-msp19:32:420
17920991013,32cyclictest1078-21/usr/sbin/munin19:48:160
17920991013,31cyclictest20823-21sendmail_mailst21:48:160
17920991013,30cyclictest352-21runrttasks22:47:350
179209910110,11cyclictest0-21swapper/021:12:060
179209910110,11cyclictest0-21swapper/021:12:060
17920991004,31cyclictest13281-21/usr/sbin/munin00:18:030
17920991004,31cyclictest13281-21/usr/sbin/munin00:18:030
17920991003,40cyclictest26717-21latency_hist19:27:440
17920991003,32cyclictest12561-21taskset23:23:040
1792099994,28cyclictest352-21runrttasks21:34:520
1792099992,39cyclictest24247-21/usr/sbin/munin22:48:140
17920999847,45cyclictest25456-21ssh21:03:000
1792099984,39cyclictest6390-21ntp_states22:18:130
1792099984,30cyclictest14115-21/usr/sbin/munin21:38:410
1792099983,46cyclictest2525-21ssh22:12:430
1792099983,36cyclictest30322-21/usr/sbin/munin23:53:020
1792099983,31cyclictest32201-21cron23:02:400
1792099983,31cyclictest32201-21cron23:02:400
1792099982,31cyclictest2935-21ls21:18:180
1792099982,24cyclictest17289-21ssh21:43:000
17930999767,19cyclictest26479-21latency_hist22:52:441
1792099973,25cyclictest8492-21/usr/sbin/munin21:28:100
1792099964,33cyclictest6106-21cpu23:12:580
17920999639,52cyclictest0-21swapper/023:58:040
17920999637,51cyclictest0-21swapper/023:33:030
1792099963,31cyclictest3815-21/usr/sbin/munin00:03:000
1792099963,31cyclictest3815-21/usr/sbin/munin00:03:000
1792099963,31cyclictest14190-21fschecks_count20:28:040
1792099963,20cyclictest28060-21runrttasks22:00:070
17920999622,67cyclictest0-21swapper/022:28:030
17920999622,67cyclictest0-21swapper/022:28:030
1792099954,29cyclictest436-21head19:43:180
17920999534,54cyclictest339-21cut23:03:030
1792099953,35cyclictest352-21runrttasks19:32:520
1792099953,30cyclictest23520-21ssh21:53:070
1792099952,39cyclictest352-21runrttasks22:37:470
1792099952,33cyclictest23534-21latency_hist20:57:430
1792099952,29cyclictest5455-21idleruntime-cro22:17:410
1792099952,29cyclictest5455-21idleruntime-cro22:17:410
17931999470,16cyclictest26041-21latency_hist21:57:442
1793099942,66cyclictest21460-21dpkg23:38:071
1792099943,32cyclictest3036-21/usr/sbin/munin23:08:160
1792099942,21cyclictest16459-21latency00:23:060
1792099939,11cyclictest0-21swapper/023:52:440
1792099933,32cyclictest20673-21grep20:48:030
1792099933,31cyclictest11230-21latency20:18:080
1792099933,30cyclictest14176-21kworker/u18:2+flush-179:019:13:030
1792099933,29cyclictest12622-21fschecks_count20:23:030
1792099933,10cyclictest0-21swapper/022:23:000
1792099925,35cyclictest6781-21timerwakeupswit20:03:170
1792099925,35cyclictest6781-21timerwakeupswit20:03:170
1792099923,25cyclictest19076-21fschecks_count20:43:040
1792099923,25cyclictest19076-21fschecks_count20:43:040
17920999231,55cyclictest17669-21sort20:38:060
1792099922,32cyclictest4614-21fschecks_time19:58:050
1792099922,32cyclictest4614-21fschecks_time19:58:050
1792099922,32cyclictest26893-21sh22:53:030
17931999150,13cyclictest181rcu_preempt20:23:032
1792099914,27cyclictest25074-21latency_hist19:22:440
1792099913,29cyclictest9183-21/usr/sbin/munin20:13:160
1793199907,42cyclictest13591-21apt-get21:38:072
1792099903,31cyclictest24622-21grep20:58:190
17931998965,15cyclictest17651-21rm22:37:522
1793099893,73cyclictest13591-21apt-get21:37:561
1793099863,51cyclictest954-21ssh23:03:171
17931998460,18cyclictest28344-21apt-key19:32:442
17931998454,20cyclictest4657-21switchtime00:03:172
17931998454,20cyclictest4657-21switchtime00:03:172
17930998464,13cyclictest2374-21systemd-journal21:46:461
17931998363,14cyclictest8418-21sh22:22:412
17931998353,21cyclictest484-21kworker/u18:0+events_unbound20:52:412
17930998365,11cyclictest26204-21apt-key21:57:461
17931998255,19cyclictest22085-21kworker/u19:2+nfsiod00:22:152
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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