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2026-05-12 - 14:18
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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 May 12, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2038521410,12sleep30-21swapper/319:01:253
204019910617,43cyclictest0-21swapper/122:01:361
19910210311,64sleep019920-21vmstat18:57:110
20406999742,48cyclictest27278-21diskmemload23:56:252
20406999742,48cyclictest27278-21diskmemload23:56:252
20406999714,33cyclictest1-21systemd21:31:222
2039699963,81cyclictest22380-21apt-get23:36:360
158172960,7sleep30-21swapper/323:26:033
2039699953,83cyclictest16412-21rm21:36:470
196982958,59sleep119791-21sed18:57:081
20406999434,53cyclictest0-21swapper/221:06:592
20406999434,53cyclictest0-21swapper/221:06:592
2040699943,34cyclictest28159-21ssh21:56:362
20406999268,18cyclictest29419-21kernelversion19:26:462
2040699923,31cyclictest31059-21/usr/sbin/munin22:01:322
20396999264,21cyclictest29307-21cut19:26:430
2039699914,57cyclictest15-21ksoftirqd/019:41:240
20406999018,24cyclictest29132-21sh21:03:112
20396999052,31cyclictest22308-21sendmail00:31:210
20396999049,32cyclictest0-21swapper/023:06:240
20406998962,18cyclictest16361-21latency_hist00:21:242
20406998962,18cyclictest16361-21latency_hist00:21:242
2040699893,44cyclictest21944-21apt-key23:36:222
2040699884,42cyclictest26013-21switchtime21:51:582
2040699884,42cyclictest26013-21switchtime21:51:582
2040699884,41cyclictest352-21runrttasks20:26:512
20406998843,38cyclictest0-21swapper/223:21:332
2040699884,24cyclictest22492-21fschecks_count19:06:322
20406998835,46cyclictest16639-21sh23:26:452
20406998835,46cyclictest16639-21sh23:26:452
20406998830,50cyclictest0-21swapper/222:41:402
2040699882,32cyclictest10215-21latency_hist22:21:232
20396998811,46cyclictest15-21ksoftirqd/023:15:390
2040699873,32cyclictest24938-21cut21:51:232
20406998710,29cyclictest7269-21grep19:56:572
20401998710,60cyclictest16494-21chrt21:37:021
2039699878,45cyclictest15-21ksoftirqd/019:13:040
20396998748,18cyclictest181rcu_preempt00:22:120
1908328713,38sleep20-21swapper/218:56:482
2040699868,27cyclictest26109-21fschecks_count20:56:432
2040699864,43cyclictest1905-21fschecks_count23:01:432
2040699864,34cyclictest9770-21ssh21:26:202
2040699864,32cyclictest14383-21apt-key20:21:252
2040699864,28cyclictest16332-21/usr/sbin/munin22:31:482
2040699863,33cyclictest16983-21fschecks_time21:37:532
2040699863,31cyclictest2596-21unixbench_multi22:06:582
2040699863,31cyclictest22359-21/usr/sbin/munin23:36:322
2040699863,30cyclictest24895-21wc20:51:532
2040699862,26cyclictest19472-21/usr/sbin/munin22:36:382
2040699862,26cyclictest19472-21/usr/sbin/munin22:36:382
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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