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2026-05-31 - 08:54
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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 May 31, 2026 00:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
185329912160,55cyclictest18520-21cyclictest21:40:460
185329911553,10cyclictest31043-40logrotate23:50:080
18376210612,58sleep018400-21munin-run19:00:050
185329910484,12cyclictest25899-21diskmemload22:53:250
18532991033,52cyclictest12691-21apt-get22:25:240
18427210110,65sleep218446-21unin-run19:00:072
18532999770,10cyclictest181rcu_preempt23:20:050
18542999667,9cyclictest181rcu_preempt21:24:472
281852950,7sleep20-21swapper/222:50:302
18532999572,14cyclictest18520-21cyclictest00:06:240
18532999358,18cyclictest181rcu_preempt00:00:190
1853799923,79cyclictest22627-21apt-get19:10:181
1853799923,79cyclictest22627-21apt-get19:10:181
18532999171,14cyclictest20842-21apt-key20:45:080
18532999153,28cyclictest0-21swapper/021:05:060
18532998958,13cyclictest181rcu_preempt19:15:150
18532998954,15cyclictest181rcu_preempt22:15:280
18532998954,15cyclictest181rcu_preempt22:15:280
18537998862,20cyclictest27481-21sh21:55:311
1853799882,77cyclictest28355-21apt-get23:45:291
1853799873,77cyclictest7480-21kworker/u17:1+ext4-rsv-conversion22:25:301
18532998756,14cyclictest181rcu_preempt21:30:200
18542998632,16cyclictest0-21swapper/219:30:302
18532998651,16cyclictest181rcu_preempt21:24:180
18542998467,10cyclictest27131-21timerandwakeup21:00:412
18537998467,11cyclictest19773-21ssh00:25:041
18537998467,11cyclictest19773-21ssh00:25:041
18532998463,13cyclictest24891-21ssh22:45:260
18532998463,13cyclictest24891-21ssh22:45:260
18532998460,18cyclictest24047-21latency_hist20:55:070
18532998460,18cyclictest24047-21latency_hist20:55:070
18542998363,11cyclictest0-21swapper/200:15:262
18542998362,14cyclictest1-21systemd21:30:162
18537998357,19cyclictest26338-21kworker/u18:2+nfsiod23:29:351
18532998364,12cyclictest18520-21cyclictest23:35:590
18532998358,17cyclictest15934-21fschecks_count22:30:250
1854299824,59cyclictest13006-21ssh22:26:082
18537998261,15cyclictest20664-21apt-key21:45:071
18537998261,14cyclictest0-21swapper/122:25:071
18537998261,14cyclictest0-21swapper/122:25:071
18537998257,19cyclictest14598-21latency_hist21:35:071
18532998165,8cyclictest0-21swapper/023:10:320
18532998165,8cyclictest0-21swapper/023:10:320
18542998045,12cyclictest181rcu_preempt20:50:202
18542998045,12cyclictest181rcu_preempt20:50:202
18542998034,17cyclictest18520-21cyclictest21:19:002
1853299807,57cyclictest21059-21apt-get20:45:250
18532998059,10cyclictest0-21swapper/019:20:390
18532998052,10cyclictest181rcu_preempt23:25:160
18542997959,10cyclictest0-21swapper/223:35:552
18542997948,22cyclictest22972-21latency_hist00:30:072
18542997933,10cyclictest181rcu_preempt19:10:082
18532997960,10cyclictest0-21swapper/022:01:120
18532997956,17cyclictest21600-21sh21:46:290
18532997956,17cyclictest21600-21sh21:46:290
18532997955,12cyclictest0-21swapper/019:55:260
18532997937,7cyclictest181rcu_preempt00:10:190
18532997936,23cyclictest11630-21latency_hist21:30:070
1854299789,51cyclictest21352-21ssh21:46:202
1854299789,51cyclictest21352-21ssh21:46:202
18537997858,13cyclictest297-21systemd-logind21:55:051
18537997850,21cyclictest1374-21kworker/u18:1+nfsiod23:58:201
1853299783,45cyclictest27962-21dpkg23:45:060
1854299774,51cyclictest8150-21apt-get00:05:222
18532997759,8cyclictest0-21swapper/021:50:310
18532997749,11cyclictest181rcu_preempt19:25:200
18542997629,21cyclictest20885-21apt-key20:45:082
18537997655,14cyclictest28161-21kworker/u17:0-writeback22:55:261
18537997654,15cyclictest25899-21diskmemload23:20:391
18537997650,19cyclictest21883-21latency_hist23:35:061
1853799763,42cyclictest20420-21apt-get21:45:191
1853799763,42cyclictest20420-21apt-get21:45:191
18532997658,12cyclictest1-21systemd23:23:170
18532997643,23cyclictest30558-21latency_hist19:35:070
18532997640,8cyclictest0-21swapper/022:40:220
18542997556,9cyclictest0-21swapper/223:30:292
18542997525,11cyclictest181rcu_preempt23:10:222
18542997525,11cyclictest181rcu_preempt23:10:222
18537997558,12cyclictest18520-21cyclictest22:05:411
18537997557,10cyclictest29416-21diskmemload22:52:271
18537997552,18cyclictest12381-21kworker/u17:1+events_unbound20:50:041
18537997544,22cyclictest5526-21grep21:20:061
1853299756,55cyclictest18694-21/usr/sbin/munin19:00:320
18532997543,12cyclictest181rcu_preempt19:45:290
18532997537,12cyclictest181rcu_preempt23:57:120
18532997534,33cyclictest14380-21cpu20:25:210
18542997456,8cyclictest0-21swapper/223:20:072
18542997450,18cyclictest11434-21cut21:30:062
18542997450,12cyclictest31043-40logrotate23:50:062
1854299742,39cyclictest32467-21fschecks_count19:40:262
18537997455,14cyclictest18520-21cyclictest00:19:161
18537997454,14cyclictest26004-21timerandwakeup23:40:401
18537997448,19cyclictest6466-21sh22:15:151
18537997448,19cyclictest6466-21sh22:15:151
18537997437,12cyclictest181rcu_preempt19:45:261
1853799743,56cyclictest8150-21apt-get00:05:591
1853799743,51cyclictest24547-21apt-get20:55:231
1853799743,51cyclictest24547-21apt-get20:55:231
18532997460,8cyclictest0-21swapper/000:20:200
18532997460,8cyclictest0-21swapper/000:20:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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