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2026-03-28 - 07:09
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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 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
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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