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2026-06-02 - 01:04
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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 Mon Jun 01, 2026 12:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12833217715,117sleep112897-21grep06:55:461
11919212512,71sleep211920-21/usr/sbin/munin06:55:102
134289910443,55cyclictest28337-21kworker/u18:1+events_unbound10:49:582
13428991022,47cyclictest16958-21ssh11:35:082
134289910036,12cyclictest0-21swapper/210:35:002
1342899993,37cyclictest24378-21taskset09:06:112
1342899983,41cyclictest32210-21fschecks_count07:55:232
1342899983,36cyclictest5878-21latency_hist08:15:012
1342899977,40cyclictest13625-21idleruntime-cro11:29:582
1342899974,33cyclictest1915-21/usr/sbin/munin11:10:252
1342899974,33cyclictest1915-21/usr/sbin/munin11:10:252
1342899973,33cyclictest20459-21latency_hist09:00:022
13428999674,16cyclictest22698-21sh11:45:002
13428999674,16cyclictest22698-21sh11:45:002
13428999529,11cyclictest0-21swapper/209:30:142
13428999524,25cyclictest20895-21cat07:20:242
1342899952,35cyclictest27384-21latency_hist10:05:012
1342899952,35cyclictest27384-21latency_hist10:05:012
1342899952,33cyclictest30623-21fschecks_time07:50:192
13428999452,35cyclictest3128-21systemd-run09:25:002
1342899943,37cyclictest25820-21fschecks_time07:35:212
1342899943,36cyclictest13298-21/usr/sbin/munin10:35:322
1342899943,35cyclictest8624-21latency_hist12:15:002
13428999428,12cyclictest0-21swapper/208:25:162
1342899933,34cyclictest19116-21grep07:15:202
1342899933,34cyclictest14774-21/usr/sbin/munin12:25:322
1342899933,32cyclictest365-21ntpq12:00:262
13428999330,11cyclictest0-21swapper/210:10:222
1342899932,34cyclictest27418-21tune2fs07:40:212
13428999251,34cyclictest15172-21munin-node11:05:212
1342899924,32cyclictest12578-21cstates08:35:182
13428999235,10cyclictest0-21swapper/207:50:012
13428999235,10cyclictest0-21swapper/207:50:012
1342899923,39cyclictest30329-21grep09:15:262
1342899923,39cyclictest15409-21munin-node07:05:062
1342899923,39cyclictest15409-21munin-node07:05:062
1342899923,36cyclictest352-21runrttasks10:20:242
1342899923,36cyclictest23634-21latency_hist07:30:012
1342899923,35cyclictest7282-21/usr/sbin/munin10:25:212
1342899923,35cyclictest7282-21/usr/sbin/munin10:25:212
1342899923,31cyclictest1608-21fschecks_time10:15:212
1342899923,31cyclictest1608-21fschecks_time10:15:212
13428999171,13cyclictest13916-21sshd09:40:592
1342899914,34cyclictest8420-21timerandwakeup08:20:342
1342899914,34cyclictest8420-21timerandwakeup08:20:342
13428999137,10cyclictest13405-21cyclictest10:05:242
1342899913,37cyclictest1993-21grep08:00:332
13428999126,14cyclictest0-21swapper/208:49:592
1342899912,35cyclictest28209-21latency_hist11:00:012
1342899912,34cyclictest17363-21cstates07:10:152
13428999110,55cyclictest23272-21ssh11:45:232
13415999145,33cyclictest181rcu_preempt10:31:400
1342899904,32cyclictest4902-21/usr/sbin/munin11:15:152
1342899903,35cyclictest25293-21latency_hist07:35:012
1342899903,33cyclictest13573-21/usr/sbin/munin07:00:092
1342899894,34cyclictest352-21runrttasks08:06:372
1342899893,38cyclictest10800-21latency_hist11:25:012
1342899893,35cyclictest31981-21latency_hist12:00:002
1342899893,35cyclictest31981-21latency_hist12:00:002
1342899893,35cyclictest18218-21unixbench_multi08:50:352
1342899893,33cyclictest6081-21latency_hist09:30:002
1342899893,31cyclictest16568-21fschecks_count10:40:192
1342899893,31cyclictest16568-21fschecks_count10:40:192
13428998927,15cyclictest0-21swapper/209:45:372
1342899892,34cyclictest23050-21processes10:50:322
1342899892,33cyclictest14073-21/usr/sbin/munin08:40:162
13419998914,59cyclictest23187-21apt-get11:45:161
13415998913,64cyclictest12672-21apt-get09:40:220
13415998911,68cyclictest23981-21sshd07:30:250
1342899884,38cyclictest12554-21apt-key09:40:032
1342899884,32cyclictest22140-21rm09:55:232
1342899883,32cyclictest2881-21cstates12:05:142
1342899882,37cyclictest12300-21latency_hist08:35:002
1341599883,52cyclictest12014-21grep12:20:190
1342899876,33cyclictest29533-21cron09:14:572
1342899876,33cyclictest29533-21cron09:14:572
1342899874,34cyclictest28325-21/usr/sbin/munin11:00:352
1342899873,34cyclictest6257-21fschecks_time08:15:202
1342899873,34cyclictest6257-21fschecks_time08:15:202
1342899873,33cyclictest16303-21sh11:34:032
1342899873,33cyclictest16303-21sh11:34:032
13419998762,18cyclictest13405-21cyclictest11:30:321
13419998762,18cyclictest13405-21cyclictest11:30:321
13415998766,14cyclictest4232-21latency_hist08:10:010
1342899864,32cyclictest9880-21grep12:15:362
13428998525,12cyclictest0-21swapper/209:50:202
13428998525,12cyclictest0-21swapper/209:50:202
13415998567,14cyclictest22001-21kworker/u18:3+events_unbound07:49:590
13415998567,14cyclictest22001-21kworker/u18:3+events_unbound07:49:590
13415998565,13cyclictest25742-21sh10:55:230
13419998437,36cyclictest32200-21/usr/sbin/munin12:00:201
13415998462,8cyclictest181rcu_preempt11:53:250
1342899833,31cyclictest12018-21fschecks_count12:20:192
1341599833,42cyclictest15-21ksoftirqd/008:30:110
13415998260,8cyclictest181rcu_preempt11:39:150
13419998162,13cyclictest5853-21timerwakeupswit11:15:341
1341999814,55cyclictest23846-21apt-get09:05:481
1342899804,30cyclictest29146-21latency_hist11:55:012
13419998058,13cyclictest20294-21diskmemload09:30:261
13419998022,17cyclictest0-21swapper/109:30:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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