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2026-07-04 - 17:24
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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 Sat Jul 04, 2026 12:43:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81910rcu_preempt30710-21ssh10:11:110
81870rcu_preempt5079-21ssh12:17:551
81770rcu_preempt19-21ksoftirqd/111:02:311
81760rcu_preempt29480-21diskmemload10:16:551
81750rcu_preempt26319-21cron10:05:331
81750rcu_preempt19-21ksoftirqd/111:29:521
81750rcu_preempt10594-21latency_hist08:00:321
81750rcu_preempt0-21swapper/107:30:571
81740rcu_preempt0-21swapper/111:55:571
81740rcu_preempt0-21swapper/109:35:501
81740rcu_preempt0-21swapper/109:05:501
81730rcu_preempt20775-21cpuspeed09:55:451
81730rcu_preempt20775-21cpuspeed09:55:451
81730rcu_preempt19662-21df_abs08:35:461
81730rcu_preempt14201-21timerwakeupswit08:10:581
81730rcu_preempt11525-21df_inode10:35:470
81720rcu_preempt25507-21switchtime08:55:581
81720rcu_preempt2192-21snmpd07:49:350
81720rcu_preempt14552-21ssh11:37:091
81720rcu_preempt11882-21missed_timers10:35:541
81720rcu_preempt0-21swapper/112:39:491
81710rcu_preempt29480-21diskmemload12:40:541
81710rcu_preempt0-21swapper/107:15:271
81710rcu_preempt0-21swapper/012:21:200
81710rcu_preempt0-21swapper/010:15:560
81700rcu_preempt29480-21diskmemload09:53:230
81700rcu_preempt13684-21sh12:33:160
81700rcu_preempt0-21swapper/112:23:371
81700rcu_preempt0-21swapper/110:30:491
81700rcu_preempt0-21swapper/011:36:460
81700rcu_preempt0-21swapper/009:33:120
89950690irq/17-ehci_hcd0-21swapper/008:17:100
81690rcu_preempt29953-21ssh12:05:451
81690rcu_preempt28931-21sh10:09:280
81690rcu_preempt2266-21interrupts07:25:501
81690rcu_preempt0-21swapper/112:25:571
81690rcu_preempt0-21swapper/110:50:521
81690rcu_preempt0-21swapper/012:42:310
81680rcu_preempt7218-21ssh10:27:261
81680rcu_preempt29480-21diskmemload09:20:451
81680rcu_preempt18458-1kworker/0:2H11:56:410
81680rcu_preempt0-21swapper/111:14:481
81680rcu_preempt0-21swapper/010:57:540
81680rcu_preempt0-21swapper/009:23:030
81680rcu_preempt0-21swapper/009:20:070
81670rcu_preempt24080-21irqstats10:00:520
81670rcu_preempt0-21swapper/111:44:181
81670rcu_preempt0-21swapper/110:09:441
81670rcu_preempt0-21swapper/107:55:391
81660rcu_preempt3752-21if_can109:25:510
81660rcu_preempt0-21swapper/010:33:400
81650rcu_preempt4568-21ssh11:20:450
81650rcu_preempt3807-21threads10:20:590
81650rcu_preempt18043-21ssh09:50:481
81650rcu_preempt0-21swapper/111:30:581
81650rcu_preempt0-21swapper/012:39:140
81640rcu_preempt29481-21munin-run09:15:330
81640rcu_preempt0-21swapper/011:10:470
81640rcu_preempt0-21swapper/010:50:500
81640rcu_preempt0-21swapper/010:28:430
81640rcu_preempt0-21swapper/009:55:450
81640rcu_preempt0-21swapper/009:55:450
81630rcu_preempt0-21swapper/011:00:580
81630rcu_preempt0-21swapper/009:01:210
81630rcu_preempt0-21swapper/007:35:500
81620rcu_preempt18542-21sendmail-msp11:45:330
81620rcu_preempt12292-21df_abs09:40:461
81620rcu_preempt0-21swapper/008:55:550
81620rcu_preempt0-21swapper/007:10:520
81610rcu_preempt0-21swapper/012:03:090
81610rcu_preempt0-21swapper/011:05:560
81610rcu_preempt0-21swapper/010:41:010
146450610irq/29-eth0-rx-31915-21kworker/0:209:45:080
81600rcu_preempt1771-21ssh12:11:190
81600rcu_preempt0-21swapper/007:50:530
81590rcu_preempt0-21swapper/011:51:190
81590rcu_preempt0-21swapper/010:47:360
81590rcu_preempt0-21swapper/007:40:510
81580rcu_preempt19-21ksoftirqd/111:18:531
81580rcu_preempt1615-21sort11:15:330
31500995849cyclictest945-21usb-storage07:44:281
31500995848cyclictest945-21usb-storage09:11:181
89550570irq/17-ehci_hcd30600-21grep12:05:540
89550570irq/17-ehci_hcd2997-21ssh12:14:591
81570rcu_preempt11649-21ssh09:39:530
81570rcu_preempt0-21swapper/011:34:090
81570rcu_preempt0-21swapper/009:46:250
89950560irq/17-ehci_hcd171rcuc/108:50:331
81560rcu_preempt20759-21ssh11:48:560
81560rcu_preempt19-21ksoftirqd/112:30:361
81560rcu_preempt0-21swapper/012:25:500
81560rcu_preempt0-21swapper/011:29:300
81550rcu_preempt0-21swapper/012:16:250
81550rcu_preempt0-21swapper/008:41:410
81550rcu_preempt0-21swapper/008:30:110
81550rcu_preempt0-21swapper/007:57:170
81550rcu_preempt0-21swapper/007:34:540
31500995550cyclictest945-21usb-storage07:17:261
81540rcu_preempt17195-21ssh09:49:301
81540rcu_preempt0-21swapper/009:05:550
81540rcu_preempt0-21swapper/008:45:590
81540rcu_preempt0-21swapper/008:00:480
81540rcu_preempt0-21swapper/007:25:560
81540rcu_preempt0-21swapper/007:15:320
31500995449cyclictest945-21usb-storage07:36:551
31500995445cyclictest945-21usb-storage08:47:121
81530rcu_preempt19-21ksoftirqd/111:50:491
81530rcu_preempt19-21ksoftirqd/110:59:231
81530rcu_preempt19-21ksoftirqd/110:45:461
81530rcu_preempt19-21ksoftirqd/109:19:151
81530rcu_preempt19-21ksoftirqd/107:45:331
31500995348cyclictest945-21usb-storage08:33:121
31500995348cyclictest945-21usb-storage07:55:131
31500995348cyclictest945-21usb-storage07:21:331
81520rcu_preempt29721-21cron12:05:331
81520rcu_preempt0-21swapper/007:22:030
31500995249cyclictest945-21usb-storage08:41:591
31500995249cyclictest945-21usb-storage08:27:121
31500995249cyclictest181ktimersoftd/110:43:421
31500995248cyclictest945-21usb-storage09:01:361
31500995248cyclictest945-21usb-storage08:17:241
31500995248cyclictest945-21usb-storage08:06:181
31500995247cyclictest945-21usb-storage08:22:541
81510rcu_preempt19023-21ps08:30:560
81510rcu_preempt19-21ksoftirqd/111:10:171
81510rcu_preempt0-21swapper/008:35:430
81510rcu_preempt0-21swapper/008:12:150
81500rcu_preempt19-21ksoftirqd/111:46:301
81500rcu_preempt19-21ksoftirqd/110:24:531
81500rcu_preempt12980-21users08:06:000
81490rcu_preempt23303-21apt-get08:50:450
81490rcu_preempt19-21ksoftirqd/111:25:331
81460rcu_preempt19-21ksoftirqd/110:10:371
31500994542cyclictest181ktimersoftd/109:32:451
146550420irq/30-eth0-tx-5572-21ssh09:29:331
3149999408cyclictest31440-21kworker/0:208:20:330
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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