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2026-03-28 - 10:21
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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 Sat Mar 28, 2026 00:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3183722530,24sleep20-21swapper/219:04:252
3183722530,24sleep20-21swapper/219:04:252
1029721090,3sleep1271irq_work/123:50:521
118392940,5sleep00-21swapper/022:05:140
3190899935,30cyclictest87-21kswapd019:04:332
3190899935,30cyclictest87-21kswapd019:04:332
31899999363,22cyclictest15326-21sh23:04:591
31899999360,25cyclictest20622-21fschecks_count23:14:431
3190899923,10cyclictest0-21swapper/223:29:372
3190899923,10cyclictest0-21swapper/223:29:372
31908999146,38cyclictest373-21lldpd21:29:242
3190899913,31cyclictest21360-21cstates00:10:002
3190899905,34cyclictest2604-21modprobe23:39:212
31908999049,35cyclictest31885-21cyclictest21:35:462
3190899903,41cyclictest29053-21/usr/sbin/munin21:40:122
3190899895,9cyclictest0-21swapper/223:54:332
3190899894,43cyclictest27240-21/usr/sbin/munin00:19:322
3190899894,38cyclictest14548-21modprobe19:49:212
3190899893,41cyclictest722-21cpu00:29:372
31908998844,37cyclictest0-21swapper/222:24:212
3190899884,38cyclictest4793-21cstates21:54:392
3190899884,38cyclictest4332-21munin-run21:54:222
31908998827,51cyclictest0-21swapper/219:29:252
3190899882,38cyclictest20510-21cpuspeed23:14:382
31899998864,16cyclictest27263-21timerandwakeup23:24:581
3190899875,36cyclictest11384-21/usr/sbin/munin22:59:552
3190899874,40cyclictest29468-21latency_hist20:34:242
3190899874,39cyclictest352-21runrttasks22:17:202
3190899874,39cyclictest352-21runrttasks22:17:202
3190899874,37cyclictest24503-21latency_hist20:19:252
3190899874,36cyclictest28490-21apt-config22:34:242
3190899874,35cyclictest352-21runrttasks21:22:502
3190899874,33cyclictest5376-21/usr/sbin/munin22:49:562
3190899874,33cyclictest5376-21/usr/sbin/munin22:49:562
3190899873,41cyclictest2910-21ssh23:39:332
3190899873,41cyclictest2910-21ssh23:39:332
3190899873,39cyclictest368-21cron00:29:212
3190899873,38cyclictest21709-21fschecks_count20:09:422
3190899873,34cyclictest24957-21taskset00:14:572
3190899873,34cyclictest24957-21taskset00:14:572
318212879,52sleep131832-21grep19:04:251
318212879,52sleep131832-21grep19:04:251
306962876,51sleep030415-21/usr/sbin/munin18:59:520
306962876,51sleep030415-21/usr/sbin/munin18:59:520
3190899866,10cyclictest0-21swapper/221:59:362
3190899865,35cyclictest27089-21awk23:24:562
3190899865,11cyclictest0-21swapper/223:59:382
3190899863,43cyclictest32244-21if_eth022:39:452
3190899863,41cyclictest15057-21apt-get19:49:342
3190899863,35cyclictest9738-21find23:49:562
31908998570,8cyclictest0-21swapper/200:09:212
31908998564,15cyclictest277-21dbus-daemon22:29:222
3190899854,9cyclictest0-21swapper/220:54:372
3190899854,36cyclictest29947-21/usr/sbin/munin20:34:432
3190899853,36cyclictest26633-21cut20:24:452
3190899852,38cyclictest17635-21grep19:54:572
3190899844,38cyclictest352-21runrttasks23:09:512
3190899844,38cyclictest352-21runrttasks23:09:512
3190899844,37cyclictest13335-21basename22:09:212
3190899844,34cyclictest31746-21latency_hist22:39:242
3190899844,34cyclictest1420-21fschecks_time19:09:292
3190899844,33cyclictest12816-21latency_hist21:14:242
3190899843,38cyclictest31798-21ssh21:44:552
3190899843,37cyclictest22249-21cstates21:29:392
3190899843,36cyclictest5806-21grep19:19:572
3190899843,36cyclictest3615-21modprobe20:54:212
3190899843,36cyclictest19198-21unixbench_multi19:59:572
3190899843,35cyclictest13123-21/usr/sbin/munin21:14:532
31899998462,17cyclictest24612-21latency_hist20:19:241
3190899835,41cyclictest5922-21ssh23:44:372
3190899834,39cyclictest4748-21ssh22:48:282
3190899834,34cyclictest4113-21sort19:14:582
3190899833,38cyclictest6819-21latency_hist21:04:262
3190899833,36cyclictest13897-21ssh22:09:422
3190899833,35cyclictest24750-21/usr/sbin/munin20:19:562
3190899833,33cyclictest10579-21proc_pri19:34:542
3190899833,33cyclictest10579-21proc_pri19:34:542
31899998360,16cyclictest31885-21cyclictest19:39:541
31899998360,16cyclictest31885-21cyclictest19:39:541
3190899824,36cyclictest15135-21taskset23:04:562
3190899823,38cyclictest1962-21latency_hist20:49:212
3190899823,37cyclictest24237-21awk23:19:552
31899998260,11cyclictest0-21swapper/120:49:591
31908998161,14cyclictest7133-21/usr/sbin/munin21:04:492
3190899814,36cyclictest8638-21chrt19:29:442
3190899814,36cyclictest8638-21chrt19:29:442
3190899814,32cyclictest21248-21modprobe20:09:212
31899998162,11cyclictest0-21swapper/119:39:241
31899998162,11cyclictest0-21swapper/119:39:241
31899998154,19cyclictest19525-21kworker/u19:0+events_unbound20:34:221
3189499812,44cyclictest2388-21/usr/sbin/munin22:44:570
31894998118,48cyclictest22372-21ssh22:24:220
31908998064,10cyclictest31590-21cpuspeed20:40:322
31908998064,10cyclictest31590-21cpuspeed20:40:322
3190899804,35cyclictest12485-21timerwakeupswit19:39:572
3190899804,35cyclictest12485-21timerwakeupswit19:39:572
3190899803,36cyclictest9121-21/usr/sbin/munin22:54:552
31899998058,14cyclictest27895-21sh00:20:421
31894998062,13cyclictest5841-21kworker/u19:0+events_unbound22:04:210
31894997949,21cyclictest352-21runrttasks19:19:540
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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