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2026-05-16 - 08:53
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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 Sat May 16, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29318216814,23sleep00-21swapper/018:56:510
28747214310,94sleep228787-21sort18:56:322
2970321036,15sleep10-21swapper/118:58:311
30064999978,15cyclictest21415-21sh23:16:050
30064999874,14cyclictest0-21swapper/019:41:450
30069999772,19cyclictest5191-21diskmemload23:46:381
3006999969,67cyclictest7629-21apt-get19:31:231
30069999531,9cyclictest0-21swapper/123:51:201
3006999952,86cyclictest18470-21kworker/u18:3+ext4-rsv-conversion22:17:221
30069999469,19cyclictest12104-21sh21:11:361
30069999469,16cyclictest23186-21systemctl21:31:051
3006999943,40cyclictest2434-21grep19:11:431
3006999943,36cyclictest30145-21latency_hist22:36:081
30069999430,7cyclictest0-21swapper/120:56:381
30069999428,20cyclictest22310-21grep20:11:481
3006499944,69cyclictest9890-21apt-get23:51:230
3006999938,23cyclictest18413-21sendmail23:11:041
3006999934,36cyclictest8811-21fschecks_time21:06:281
3006999934,36cyclictest8811-21fschecks_time21:06:281
30069999333,8cyclictest0-21swapper/121:56:401
30076999255,15cyclictest181rcu_preempt23:21:162
30069999139,44cyclictest0-21swapper/100:01:061
3006999913,35cyclictest6571-21latency_hist22:51:081
3006999913,35cyclictest19697-21apt-config20:06:081
3006999913,35cyclictest19697-21apt-config20:06:081
30069999126,12cyclictest0-21swapper/119:30:401
3006999904,36cyclictest27674-21/usr/sbin/munin23:26:341
30069999037,46cyclictest1132-21sh00:30:161
3006999903,27cyclictest14997-21/usr/sbin/munin22:11:441
30069998934,47cyclictest0-21swapper/123:11:431
3006999893,41cyclictest32518-21cut19:06:291
3006999893,35cyclictest23382-21seq23:18:141
3006999893,34cyclictest15064-21awk21:16:321
3006999883,34cyclictest4852-21cut19:21:271
3006999883,30cyclictest31193-21idleruntime-cro20:41:051
3006999883,24cyclictest31114-21sort00:26:081
30069998832,45cyclictest0-21swapper/121:41:091
30069998827,7cyclictest0-21swapper/121:41:431
3006999878,34cyclictest5191-21diskmemload23:31:411
3006999873,40cyclictest19373-21apt-get20:06:191
3006999873,40cyclictest19373-21apt-get20:06:191
3006999873,34cyclictest17597-21cpuspeed21:21:211
3006999873,32cyclictest1467-21fschecks_count23:36:261
3006999873,32cyclictest1467-21fschecks_count23:36:261
3006999873,28cyclictest11552-21latency_hist19:41:101
30069998732,8cyclictest0-21swapper/123:01:381
3006999873,27cyclictest22327-21/usr/sbin/munin00:11:411
3006999873,27cyclictest22327-21/usr/sbin/munin00:11:411
3006999872,34cyclictest2998-21sort20:51:411
3006999872,34cyclictest2998-21sort20:51:411
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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