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2026-04-07 - 14:25
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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 50 highest latencies:
System rackbslot7.osadl.org (updated Tue Apr 07, 2026 00:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
163949910251,43cyclictest0-21swapper/219:14:032
16394991023,73cyclictest3460-21apt-get22:18:572
16394991023,73cyclictest3460-21apt-get22:18:572
163769910084,10cyclictest21841-21ssh21:54:250
1639499973,80cyclictest21642-21apt-get21:54:022
16394999727,42cyclictest17606-21sh22:40:582
16394999642,47cyclictest11138-21open_files20:24:122
16386999637,7cyclictest0-21swapper/121:23:591
16386999637,7cyclictest0-21swapper/121:23:591
1578629610,57sleep015870-21sed18:59:300
1638699954,37cyclictest16865-21latency_hist20:43:441
16386999540,48cyclictest22814-21sh22:49:181
16386999442,45cyclictest0-21swapper/100:23:451
16386999442,45cyclictest0-21swapper/100:23:451
16386999424,23cyclictest17229-21fschecks_count20:44:021
1638699942,36cyclictest27594-21fschecks_time22:04:051
16394999348,38cyclictest23247-21diskmemload23:44:492
1638699932,44cyclictest4006-21idleruntime-cro23:13:421
16386999229,12cyclictest0-21swapper/100:13:451
1638699922,38cyclictest4541-21uniq23:14:011
1639499914,45cyclictest14592-21ssh23:30:022
1638699913,40cyclictest17389-21timerwakeupswit19:04:171
1638699913,34cyclictest25376-21sort23:49:031
1638699913,34cyclictest25376-21sort23:49:031
16386999131,12cyclictest0-21swapper/120:24:021
16386999130,52cyclictest0-21swapper/122:18:451
16386999130,52cyclictest0-21swapper/122:18:451
16386999125,9cyclictest0-21swapper/123:59:041
16386999125,9cyclictest0-21swapper/123:59:041
16376999161,9cyclictest181rcu_preempt19:29:170
16394999030,52cyclictest0-21swapper/220:14:162
1638699904,37cyclictest2672-21grep00:04:191
16386999039,44cyclictest0-21swapper/123:38:541
1638699903,35cyclictest19553-21unixbench_multi20:49:171
1638699903,34cyclictest23901-21seq21:04:051
1638699903,34cyclictest22726-21timerwakeupswit20:59:181
1638699903,34cyclictest22499-21grep19:19:151
1638699903,34cyclictest12616-21cut21:39:021
1638699903,33cyclictest698-21cpuspeed21:19:371
1638699903,33cyclictest23930-21seq19:24:101
1638699903,33cyclictest23930-21seq19:24:101
1638699903,33cyclictest19842-21timerwakeupswit22:44:191
1638699903,33cyclictest19842-21timerwakeupswit22:44:191
1638699903,33cyclictest13789-21/usr/sbin/munin23:29:101
1638699903,32cyclictest15368-21latency_hist20:38:451
1638699903,32cyclictest13073-21latency_hist23:28:441
16386999027,9cyclictest0-21swapper/122:29:161
16386999027,9cyclictest0-21swapper/122:29:161
1638699902,36cyclictest26931-21grep19:34:031
1638699902,35cyclictest25529-21ps22:54:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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