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2026-04-13 - 11:41
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Data to construct the above plot have been generated using the RT test utility cyclictest.

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 highest latencies:
System rackcslot3.osadl.org (updated Mon Apr 13, 2026 00:43:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811030rcu_preempt0-21swapper/122:19:371
81770rcu_preempt13094-1kworker/0:1H21:23:110
81770rcu_preempt0-21swapper/122:37:151
81740rcu_preempt8917-21ssh22:25:380
81740rcu_preempt10230-21diskstats21:25:421
81730rcu_preempt4218-21diskmemload00:23:080
81730rcu_preempt19-21ksoftirqd/121:59:311
81730rcu_preempt19-21ksoftirqd/100:00:261
81730rcu_preempt19-21ksoftirqd/100:00:261
81730rcu_preempt0-21swapper/122:48:501
81720rcu_preempt30253-1kworker/0:1H00:12:540
81710rcu_preempt13855-21rm22:35:101
81710rcu_preempt13361-21ssh00:40:070
81710rcu_preempt0-21swapper/123:51:011
81710rcu_preempt0-21swapper/122:56:231
81710rcu_preempt0-21swapper/100:10:491
81710rcu_preempt0-21swapper/019:35:390
81710rcu_preempt0-21swapper/000:28:400
81700rcu_preempt6294-21apt-get22:20:381
81700rcu_preempt27561-21wc20:35:531
81700rcu_preempt18114-21df_abs23:45:411
81700rcu_preempt0-21swapper/100:05:481
81700rcu_preempt0-21swapper/022:15:460
81700rcu_preempt0-21swapper/000:17:080
89850690irq/17-ehci_hcd14490-21ssh21:34:121
81690rcu_preempt0-21swapper/123:40:261
81690rcu_preempt0-21swapper/123:34:051
89850680irq/17-ehci_hcd945-21usb-storage21:46:090
81680rcu_preempt2698-21ssh22:12:260
81680rcu_preempt19-21ksoftirqd/123:09:571
81680rcu_preempt10746-1kworker/0:0H22:38:240
81680rcu_preempt0-21swapper/023:50:140
81680rcu_preempt0-21swapper/019:20:480
81680rcu_preempt0-21swapper/019:11:430
81670rcu_preempt0-21swapper/022:51:510
81660rcu_preempt19-21ksoftirqd/123:13:431
81660rcu_preempt11420-21latency_hist19:35:261
81660rcu_preempt0-21swapper/022:22:290
81660rcu_preempt0-21swapper/020:05:370
81650rcu_preempt19-21ksoftirqd/122:42:161
81650rcu_preempt0-21swapper/119:10:531
81640rcu_preempt30195-21vmstat20:45:521
81640rcu_preempt19-21ksoftirqd/123:26:541
81640rcu_preempt19-21ksoftirqd/121:48:561
81640rcu_preempt0-21swapper/022:45:410
81630rcu_preempt30918-21df22:05:401
81630rcu_preempt30868-21cpuspeed_turbos22:05:390
81630rcu_preempt21203-21missed_timers23:50:460
81630rcu_preempt17739-21latency_hist21:40:260
81630rcu_preempt0-21swapper/023:30:280
81630rcu_preempt0-21swapper/022:57:120
81630rcu_preempt0-21swapper/021:00:510
81620rcu_preempt4218-21diskmemload21:52:441
81620rcu_preempt0-21swapper/023:25:480
81620rcu_preempt0-21swapper/022:30:470
81600rcu_preempt11279-21ssh21:26:260
81600rcu_preempt0-21swapper/023:35:430
81600rcu_preempt0-21swapper/023:19:000
81600rcu_preempt0-21swapper/000:43:220
6251996046cyclictest945-21usb-storage19:48:471
147850600irq/30-eth0-tx-0-21swapper/021:52:040
89850590irq/17-ehci_hcd27177-21ssh21:57:020
81590rcu_preempt5191-21cut23:20:420
81590rcu_preempt20574-21if_can020:10:421
81590rcu_preempt19-21ksoftirqd/100:03:501
81590rcu_preempt15052-21apt-get21:35:381
81590rcu_preempt0-21swapper/023:58:210
81590rcu_preempt0-21swapper/023:58:210
81590rcu_preempt0-21swapper/022:44:390
81590rcu_preempt0-21swapper/000:00:470
89850580irq/17-ehci_hcd945-21usb-storage19:50:401
81580rcu_preempt19-21ksoftirqd/121:45:191
81580rcu_preempt0-21swapper/000:30:490
89850570irq/17-ehci_hcd945-21usb-storage21:00:451
81570rcu_preempt30565-21munin-run22:05:250
81570rcu_preempt0-21swapper/023:40:470
81570rcu_preempt0-21swapper/021:33:040
81570rcu_preempt0-21swapper/020:14:190
81570rcu_preempt0-21swapper/019:55:430
89050560irq/17-ehci_hcd945-21usb-storage22:50:481
81560rcu_preempt2138-21snmpd20:50:500
81560rcu_preempt0-21swapper/021:15:160
81560rcu_preempt0-21swapper/021:15:160
81560rcu_preempt0-21swapper/020:47:220
81560rcu_preempt0-21swapper/020:40:520
81560rcu_preempt0-21swapper/019:49:460
81560rcu_preempt0-21swapper/000:05:470
81550rcu_preempt11293-21latency_hist19:35:250
81550rcu_preempt0-21swapper/021:40:150
81540rcu_preempt0-21swapper/023:11:540
81540rcu_preempt0-21swapper/023:07:350
81540rcu_preempt0-21swapper/021:16:200
81540rcu_preempt0-21swapper/021:16:200
81540rcu_preempt0-21swapper/020:24:450
81530rcu_preempt8754-21df00:30:411
81530rcu_preempt5049-21apt-get23:20:411
81530rcu_preempt0-21swapper/023:03:550
81530rcu_preempt0-21swapper/019:16:140
81520rcu_preempt31571-21latency_hist20:55:261
81520rcu_preempt19-21ksoftirqd/123:38:411
81520rcu_preempt19-21ksoftirqd/121:18:481
81520rcu_preempt19-21ksoftirqd/121:18:481
81520rcu_preempt0-21swapper/021:09:430
81520rcu_preempt0-21swapper/020:57:350
6251995249cyclictest181ktimersoftd/121:24:151
81510rcu_preempt4999-21ssh00:22:541
81510rcu_preempt29033-21ssh23:04:051
81510rcu_preempt19-21ksoftirqd/100:37:201
81510rcu_preempt0-21swapper/019:41:090
6251995148cyclictest181ktimersoftd/121:12:421
6251995148cyclictest181ktimersoftd/121:12:421
81500rcu_preempt23898-21cron20:25:261
81500rcu_preempt19-21ksoftirqd/122:00:581
81500rcu_preempt19-21ksoftirqd/100:15:501
6251995048cyclictest181ktimersoftd/123:17:321
147950500irq/31-eth0-tx-0-21swapper/100:28:151
89850490irq/17-ehci_hcd17017-21latency19:55:471
81490rcu_preempt9056-21df19:25:380
81490rcu_preempt26822-21diskstats20:35:420
81490rcu_preempt19-21ksoftirqd/100:41:051
81490rcu_preempt0-21swapper/120:43:431
81490rcu_preempt0-21swapper/020:28:420
6251994946cyclictest945-21usb-storage19:16:421
147950490irq/31-eth0-tx-0-21swapper/122:30:091
81480rcu_preempt0-21swapper/020:15:470
6250994744cyclictest945-21usb-storage20:00:420
6251994441cyclictest945-21usb-storage19:30:231
6250994313cyclictest0-21swapper/019:51:000
147950430irq/31-eth0-tx-17733-21/usr/sbin/munin20:00:361
6251994239cyclictest181ktimersoftd/120:05:401
625099421cyclictest0-21swapper/020:32:060
6251993835cyclictest181ktimersoftd/119:40:451
147950380irq/31-eth0-tx-1402-21kworker/1:220:30:261
81370rcu_preempt19-21ksoftirqd/120:30:461
81370rcu_preempt0-21swapper/122:10:461
147950370irq/31-eth0-tx-1402-21kworker/1:220:15:261
81340rcu_preempt19-21ksoftirqd/119:25:251
6251993431cyclictest181ktimersoftd/121:05:381
6251993331cyclictest181ktimersoftd/120:50:441
147650300irq/28-eth0-rx-10174-21apt-get19:30:351
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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